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Found 28 results

  1. Ever wonder if you could output MIDI data to a MIDI synthesizer from your Diamond GOS equipped ATARI 8 bit through a MIDI MAX compatible interface? I didn't think so but I had to ask. And the answer is: I came across a MIDI device handler(M:) and blogged about the adventure of writing a test program in ATARI BASIC. I have had the time to try it out with a Diamond GOS program written in machine code using the MAC65 assembler. It seems that the handler, if loaded as an AUTORUN.SYS, will stay operational when quitting to BASIC or when running an APP. The program DMIDITST.APP loads and then sets up the menu bar with a quit command. Then it places 8 icons for the C scale. These where borrowed from a previous program. The M: device is opened for output to the MIDI interface. There is no error checking for the M: device and am not sure what will happen if it's not loaded. I did note that after running SDUMP.ACC, the program stopped working. This was most likely caused by the ACC opening the same IO channel for the printer that was opened for the M: device. Haven't run into an other glitches. On the chance you have an A8, Diamond GOS, MIDI interface and a MIDI sound module, the disk with the m: device, application, source and macro library files is attached. Diamond MIDI test.atr Create a Diamond boot disk with DOS and configuration files. Copy the AUTORUN.SYS and DMIDITST.APP to your boot disk. Hook up your synth, push in your Diamond cart, boot up the system, and load the app. I used DOS 2.5 on an xe with st mouse, Diamond GOS 3 and MIDIMAX. There shouldn't be any reason why the program sill not run under Diamond 2.0. It would be nice to hear that someone else was able to get it to run on their system.
  2. I started looking at a disassembly of Melody Blaster, after I became curious as to which ECS games supported tape expansions. My hope is to create virtual tape images for jzintv that can be used to allow extra music into the game. As an intermediate step, I'll try creating a ROM hack with new music in it. The ROM follows the standard memory map for 12K Mattel games: 8K in the $5000-6FFF range, and 4K in the $Dxxx range. Most of what's in $6xxx is the Help text, and it overflows a little into $D0xx. After that is the 11 tunes. There are a bunch of calls in the code to functions at $40xx and $41xx, so the ECS "Executive ROM" must be located there. The ECS does have onboard RAM, and I'm pretty sure tunes are loaded there and then parsed by the ECS EXEC. The list of pointers to the starting addresses of each tune starts at $57E7 (cartridge ROM), with the low-order byte listed first, and the starting address for the current tune is loaded into $354 (16-bit system RAM address). The game allows for one extra tune to be loaded into memory, either from a tape or by playing a tune (one channel only). I hope tape tunes aren't limited to a single channel, but I don't know yet. All the music data fits into 8-bit words, probably because that's the width of the ECS RAM. As for the tunes, the first 18 bytes comprise the title. I looked at the first 2 tunes so far, which both had a 9-byte signature starting with 0 1 1 9 6 6 9 4. After that was the data for each of the 4 channels used by the game (2 sprite-based notes per channel). The channels' lines are listed separately, in order from low to high, and not all of them are used. The music data consists of byte pairs: a note ($18 is Middle-C) or $80 for a rest, and then a duration in "ticks". In most cases, channel data is separated by the signatue 1 1 $80 1, but I found an exception in Tune 2 "ROW,ROW THE BOAT". That signature appears twice in a row in Tune 1 "BLASTER'S BLUES" because one channel is not used. In many cases, channels' music data is prefaced with a rest, because another channel has a starting pick-up. The first channel for BLASTER'S BLUES is the left-hand harmony line, which has a small pause to allow the pickup in the right hand melody line. Then the channel-separator signature appears twice, followed by the melody line. Strangely, the fourth channel has a series of rests which add up to 234 ticks, where it is then used to play a second note in the right hand at the tune's end. There are a total of 9 consecutive rests here, the first 8 of which are 25 ticks each ("$19"), and the last of which is 34 ticks ("$22"). There's a little more data here which I haven't yet deciphered. ROW,ROW THE BOAT is played as a round, with the harmony line picking up a measure behind the melody line. The same value $18 is used for the C note in their respective octaves, which leaves me to believe that the ninth byte in the signature following the title contains bits to tell us which channels have octave offsets (in other words, are meant to be played by the left hand or the right hand). The end-of-channel signature is also absent at one point, so maybe the header signature tells us which channels are not used at all? That's as far as I got so far. I'll take the time to study the other tunes later today. Another interesting point is that there will sometimes be tiny spaces between notes at what appear to be arbitrary points: a note played for 2 ticks followed by a 1-tick rest in one hand and for the full 3 ticks in the other hand. That indicates to me that the music data was created by a device that a MIDI keyboard was connected to, and that data was only moderately cleaned up afterwards to get a consistent tempo across all channels.
  3. Changing presets/patches/voices/instruments/programs on your MIDI gear was rather easy in the early 80's. Having more the 128 instruments on a digital synth was unbelievable. So unbelievable that the original MIDI standard got a special command number( 192+channel #-1 ) and a 7bit number (0 - 127) to made the change. The MIDI Music System software provided the command Sn to accomplish this. Insert Sn between two notes in a voice and the patch magically changes. Then the future happened and synthesizer manufacturers added banks of 128 instruments. The MIDI controller 32 was assigned the task of controlling the least significant number and controller 0 as the most significant number to designate 128 banks of 128 banks of 128 patches. That's 128*128*128=2097152 patches. Accessing that many instrument voices in MMS requires these commands P32,LSB P0,MSB Sn It is pretty simple as far as MIDI standards are concerned. But..... it seems every manufacture displays patch codes in their own way and deriving these numbers may require a close examination of the manual. I've gone through my MIDI equipment and documented how to calculate the numbers from the front panel displays of the patch information. Your equipment will more then likely be different but you may find this of interest and I'll be able to use it as reference when next I forget. -------------------- MIDIPlus miniEngine USB- a simple midi device with MIDI standard instruments, 127 possible sounds. Three digit display shows sound number. The miniEngine is supplied with a card with the MIDI numbers and names of the patches. MMS command: Sn where n = 0 to 127. Could it be any easier? -------------------- KORG - MicroKorg - This MIDI device contains 128 user definable patches. The patches can be accessed by setting the Dial(bank select) , A/B button(bank side) and the 1-8 buttons(program numbers). These 3 settings define a 7 bit number that sets the patch. The patch displays as (A/B bank side)(Bank Select Dial)(Program button). display = (A/B) (X) (Y) n = (A=0 or B=64)+((X-1)*8))+(Y-1) MMS command: Sn ------------------ Yamaha TG33 - There are 5 banks of 64 voices. 1 - internal programable, 2- Card (card can hold 1 or 2 banks), and 2 - presets. Controller Command 00 and 32 are used to set MSB and LSB for bank. Voice Display = (bank)X.Y Name Set bank (page 104) bank Voice Mode Multi Mode (?) Internal 0 10 Card 1 1 11 Card 2 4 14 Preset 1 2 22 Preset 2 5 25 MMS commands P0,0 MSB P32, bank LSB Sn ,where n = (X-1)*8 + (Y-1) Have not worked with Multi Mode. ----------------- E-MU Proteus 2000 - The Proteus 2000 ships with 4 banks of USER programable memory and 7 banks of COMPSER presets. More programed ROMs can be added. Display: preset location, preset numbers, bank number, name (page 19) MMS command: P0,n Preset location (MSB) USER = 3 COMPSR = 4 more ROM = ? P32,n Bank (LSB) USER = 0-3 COMPSR = 0-7 Sn 0-127 ----------------- KAWAI K1r - Patches can be made as Single(a combination of 4 wave forms) or Multi(a combination of 4 samples. Changing between internal memory and external (card M8) is done on the front panel(I,i,E,e). Single = 0, Multi = 64 Capital letter = 0, Lower case = 32 (I = internal, E = external) A=0,B=8,C=16,D=24 Number = n-1 Single iB-6 = 0 + 32 + 8 + (6-1) = 45 Command S45 Multi IC-4 = 64 + 0 + 16 + (4-1) = 83 Command S83 Switching between internal and card memory during MMS play - unknown how/if it can be done. ----------------- This data is correct until I learn otherwise.
  4. I never really thought about it but a drummer has 2 hands and 2 feet; that's 4 percussion instruments that can be struck at the same time. But are they really? I'm no drummer so the best place to start programming drum patterns was using a book of drum patterns. I chose to start with 200 Drum Patterns by Rene-Pierre Bardet and a chart of the standard MIDI note number for the percussion instruments. MIDI Music System was loaded up and a drum pattern was entered. Two or three voices were used for each pattern - A, B, Break. Then three more MIDI VOICEs were needed to sequence the pattern. I've avoided entering more until now. Trying to understand a voice file data has forced a much deeper understanding of note duration and clock cycles. Notes with the standard duration can be inputted as W, H, Q, E, S ect. or you can input a "^" followed by a 192, 96, 48, 24, 12 ect. clock cycles. As it turns out the drums can be programmed with duration of 1 clock cycle. Play them with a fast tempo and the drum instruments will sound like they were struck at the same time. Of course, MIDI is serial so nothing is played at the same time. "Fast enough" is a rather loose term. The clock cycle is constant for a given note duration. A quarter note is 48 clock cycles. The tempo is used to to set the speed at which the music is played. This a clock cycle period can change from 0.03571 seconds per cycle at 35 beats per minuet to 0.00431 sec/cycle at 290 BPM. Say you want to play a base and snare drum at the start of a 1/16 note. The base and snare are played for 1 cycle and a rest for 10 cycles. That's the 12 cycles required for a sixteenth note. C2^1, D2^1, R^10 or C2^1, D2^11. I have put together a couple of drum solos. RNB1.MUS was without using the ^ duration settings. ROCK1.MUS and RANDB1.MUS were hand coded into MMS voice 51-53. Voice 1 was then programmed with a series of jumps to the patterns. Change up the tempo and hear for yourself when the delay between strikes becomes noticeable. drumtest.atr Now I have a method of programming drum patterns and an understanding of the MMS voice file format. If the M: device works under Diamond GOS I can start automating the task of programming drum patterns.
  5. Using MIDI MUSIC SYSTEM software to build music compositions seems to fit my skill set. I'm not proficient at reading music but I can translate it. My latest arrangement was a Celtic folk song for flute and drums. Music was entered into MMS and a simple drum pattern was added. It sounded terrible. Turns out that a synthesized flute doesn't need to breath and sounds very mechanical without those breaks. Selected notes were shortened and rests were inserted to maintain timing and give the illusion that a breathing person was playing the flute. Sounded much better but it was tedious work. Then I started to think I might have saved a Voice file and used a program to make the changes. Then import the voice back into MMS. Then it dawned on me that I was going to have to figure out the file structure of a voice file and what the data means. At this time I want to share what I think I know about how to create a voice file to import into MMS. Then someday someone (or myself) might write a useful program to create those files. File header and data structure: First thing that was done was to take a look at what a voice data file contained. A few notes were entered in a voice and then the voice was saved. This short program was written to list the content to the screen. Simply change the filename to match the one you wish to view. Use the cntl-1 key to stop and start scrolling. 10 TRAP 100:COUNT=0 20 OPEN #1,4,0,"D:TEMP.V01" 30 GET #1,A:? A;" "; 33 GET #1,A:? A 37 FOR X=1 TO 3 40 GET #1,A 45 COUNT=COUNT+1 50 ? (A), 56 NEXT X 60 ? :GOTO 37 100 ? "COUNT=";:? COUNT This short voice file listing demonstrates the format of the voice file. You may want to build your own voice files and check the results. 24,0 250,0,0 10,48,0 85,48,0 75,48,0 87,48,0 250,0,0 165,48,0 245,51,255 COUNT= 24 It became apparent that the first two bytes will be the number of instructions in the file. LSB - MSB format. Then the instructions are listed. At the end of the a count of the instruction sets is displayed. This should match the 16 bit number at the beginning of the file. An instruction consists of three numbers. The first designates the specific instruction and the next 2 are for any required data. I am assuming that if the data byte is not required by the instruction then MMS does not clear them to zero. That's the only explanation I have for some of numbers I have seen. The first instruction will always be a measure marker(250). Every voice has a measure marker at the beginning. Check it out. Rests and Notes Rest Rn - 0,LSB,MSB n=0 - 65535 cycles In MMS the duration of the rest is its clock value. In MMS you would most likely assign a clock value as W,H,Q,E,S, T, or Z. Their clock values are listed on page 22 of the manual. The "." and " .. " are used to adjust the number of cycles required for the additional durations. There is also the option of setting the duration by entering the clock value as ^n. Keep in mind that meter will determine the clock value in a measure and to keep all the voices synced the total clock value must remain the same for all measures in a composition. (But you don't have to.) Note instructions are between 1 (C1) and 108(G9). If a tie is used bit 7 will be set making the value above 128. To calculate: MMS note number = (MIDI note number - 23) + (128 * IF tie) The duration is set by the next two numbers much the same as for rests. The Table The rest of the instructions are to manipulate the MMS music settings or MIDI instrument. For more information check the manual. If I missed any I'll add the information if I ever find a need to use them. If the Second or Third number's has not been determined then ND has been placed in the table. In fact, it may not have a purpose. Function MMS Input Byte 1 Byte 2 Byte 3 Rest Rn 0 LSB MSB Note (C1-G9)n MIDI# 24-127 MIDI#-23 (+128 if tie) LSB MSB Tempo Tn 240 35-290 ND Sound Sn 241 0-127 ND Program (CC) Pn,x 242 Controller number Setting 0-127 Repeat REPn 243 0 = forever 1-255 ND End Repeat ENDR 244 ND ND Jump to Voice JMPn 245 1-99 ND RETURN RTN 246 ND ND Change Channel /CHn 247 1-16 ND Transpose UP TRUn 248 0-127 ND Transpose Down TRDn 248 Start +256 - n LSB * ND Transpose Zero TRZ 249 ND ND Measure Marker M 250 ND ND Tempo up TUn 251 0-127 ND Tempo down TDn 251 Start +256 -n LSB * ND Pitch Wheel High PWHn 253 ND ND Pitch Wheel Low PWLn 253 ND ND Pitch Wheel Zero PWZ 253 0 ND *= I Think ND = not determined I hope this is a good start to understanding voice files. There are going to be some revisions to this table if I find a need to write a program that will import and export MIDI MUSIC SYSTEM Voice files. That may happen If I find that the M: device driver for the MIDIMax will work with Diamond GOS. I'll incorporate the changes when they are brought to my attention.
  6. Hi guys, I hope someone could help me I recently brought a Atari ste and got given a E Magic LOG 3 with it. It's like a midi expander box if anyone has any info on what it's used for or if it is purely a midi expander. What sort of price do they go and is it a sort after item. I'm totally new to the st scene so if anyone has any info or knowledge please let us know. *It's not my photo used but looks exactly like that
  7. Is there any MIDI software that uses BANK SELECT on the Atari ST? I used to use Master Tracks Pro 3.6 back in the mid-90s with a Yamaha PSS-795. The software can only handle up to 128 programs (patches) and was published in 1990 which was before General MIDI was introduced. So with newer keyboards that have much more than 128 patches, there is no way to assign a certain instrument unless the software supports "bank select" which is standard with General MIDI 2. My new keyboard uses the newer MIDI protocols and sadly, MTP 3.6 doesn't seem compatible. Is anyone using Atari software with keyboards from the late 1990s or newer? Thanks, Steve
  8. There were several issues left unresolved while programing the MIDI IN interface for the ATARI8 joystick ports. The first was to revert back to using the Cassette Motor Control pin on the SIO port for data flow control. This was accomplished with the AU2PORTA shield design. The second consideration was the startup default joystick pin status. The joystick pins are set to high on startup and then grounded to zero by the joystick switches. There is some reverse logic in all of this that still gives me headaches. An Arduino pin set HIGH will turn on the optocoupler transistor and grounds the Atari Joystick pin resulting in a LOW logic level. The Arduino was programed to set all the joystick direction pins to HIGH at startup. PORTA contained 0. The Arduino inverted the MIDI data, thus the Atari was able to read the MIDI note number directly. This could be made to work but here is where the problem lies…….. I wanted to us an ATARIMAX cartridge to hold the programs to be used to produce the sounds. Read MIDI note number from PORTA (joystick port 1 and 2) and use it as index into the tone tables. The problem lay in the fact that the ATARIMAX menu expected to see the joystick working normally but the Arduino was setting all the pins to ground, thus confusing the ATARIMAX. The problem was temporarily solved by unplugging the Arduino before starting/or restarting the computer. A better solution was required. The solution was to start with all Arduino data pins set LOW, when the Arduino was started or reset. The curser keys on the Atari could be used to select the menu program and space bar would run it. Then the Arduino would read the MIDI note number and set pins according to bits. The Atari would read PORTA as the inverted number. The Atari then used an EOR #255 command to invert it a second time and then use that number as an index into the frequency table. This works as long as the MIDI instrument has not send data to the Arduino before turning on the Atari. A MIDI data byte to be sent to the Atari will set the data pins and the trigger, again confusing the AtariMax menu. Press the Arduino reset to clear the serial data buffer and reset the pin logic before restarting the Atari. At least nothing has to be unplugged. Arduino UNO compatible - AU2PORTA shield - MIDI shield These are the test programs for the Arduino and Atari used to troubleshoot the data transfer. The Arduino reads the MIDI data stream and picks out a channel 1 note on or note off command. It then sends a note number to the Atari; where it is used to turn on the note or turn it off. .ATR contains the M65 source Code and related files. READBYTE.atr .ZIP of the Arduino sketch. Atari_Monosynth_AU2PORTA.zip I think I'm at a good place to decide on my next project. I don't think I will go beyond a mono instrument. Some day I may retry shaping the sound using ADSR envelopes and combine 2 - 16bit tones for some kind of harmonic distortion. Or…………..
  9. Does anyone use Cubase on an ST emulator? I created a disk image from my old Cubase floppy disk, so I could use it with NoSTalgia, and whenever I try to run it, I get this error message: "MROS not found!" I thought maybe it was because the data had not been properly extracted from my disk, so I downloaded a Cubase disk image I found online. But still, same error message: "MROS not found!" I even tried several different versions of Cubase, and still no love. Any ideas why this is happening? I never had this problem on my ST, and it's the same Cubase!
  10. MrPastGlory

    the setup

    From the album: Mr.PastGlorys´ collection

    Mr.PastGlory's only Synthcart ensemble
  11. How do I play a note via MIDIMATE? I'm trying the following code but hear nothing in Altirra: org $6000 main sei ldy #7 lda #0 sta:rpl ^20,y- mva #$28 ^28 mva #$15 ^24 mva #$23 ^2f mva #0 ^2e mva #$10 ^2e mvx #$c0 ^2d ldx #$01 ; instrument jsr send ldx #$90 jsr send ldx #$3c ; middle C jsr send ldx #$7f jsr send mva $10 ^2e cli rts send lda #$10 and:rne ^2e sta ^2e mva #$10 ^2e stx ^2d rts run main end
  12. Hello all, I'm getting back into ST MIDI sequencing after a decade (or two?!?) away. The ST software is just so uniquely brilliant and in many cases, there is absolutely nothing like it on the market today. I was wondering if there is a good resource for ST manuals. I can find some on Tim's Atari MIDI World, but I'm hoping there is a larger resource. /ü
  13. Hi everyone I'm proud to present the MidiBox TIA Cartridge! This is the first FULL midi synthetizer based on the TIA chip and cartridge cased. This is a DIY project, the firmware is opensource. It was not easy. Not because of the technical issues, just bad karma. In 2011/2012 I made a working firmware and a manager under Max/MSP. Because of personal reasons, I put the project on hold. End of 2012, I received a message from Eptheca who asked me the status of the project. With his help we decided to print 3 PCB’s. Unfortunately during this period, the hard drive of my computer suddenly decided to leave me, and I lost all my work: (( I sent the drive to Shanghai to try to recover my data, but of course my disc was one of the non-recoverable 10% (always this bad karma). So now we had the box and the electronics but nothing to put in it. In February I decided to rewrite everything but it took me some time. ... Done! We've now got a new firmware and the application to manage the box. I am inspired by the version 1 MB-SID. I kept all the features of this engine. I improved the management of banks, I dedicated two envelopes to the voice of the TIA which is free, and a few small details that might please you. Here is the features of it: 1 dedicated envelope for each voices(so 2) with optional non-linear curve and Sync which can be assigned to Amplitude and pitch. 3 specifics Mode to mix Modulation matrix and this env Env+Mods, Env*Mods, Env+(Env*Mods). 2 additional envelopes with optional non-linear curve and Sync which can be assigned to Amplitude and pitch. 4 additional LFOs with different waveforms and Sync which can be assigned to Amplitude and pitch. Pitch Bender Portamento/Glide function with Optional "Constant Time Slide". Delays 1 Arpeggiator for each voice(so 2) with optional Sync. Poly, Mono and Legato Mode Separate keyboard zones for each voice (key splitting) allows to play voices separately Extended Mode for keys(all note reponse) or non extended with offset and length. 1 velocity response for each voices (so 2) with optional CC assignment Free controller assignments to Modulation Wheel and Aftertouch LFOs, Envelopes, Arpeggios optionally syncable via external MIDI clock (one for each;) Bankstick support (4 banks of 128 sound patches per stick, up to 8 can be connected) so 32 banks. And much more. Coming soon: wave and CC sequences which allow more percussive sounds (Wavetables) with dedicated banks. Drum or Fx Kit Presets with dedicated banks. 8 Analog I/O 4bit sampling Atari 2600 Joystick and Video touch pad support. There's no CS on the cartridge version, but there's enough room in FW to add it. If someone wants to create it, you are welcome. This firmware is only for 18f4685. You can add MB-Link too if you need it, PORTA.0-7 and PORTB.0-3 share 8 I/O on the AUX connector. No CS; but I designed a Max/MSP Application (windows and Mac compatible): And it has iDevice support(sorry for those who boycott Apple products): I'm trying to finish a Max4Live version, with a common file between both applications that will retrieve the names of banks, patches and all parameters without having to open the input of the midi track and make a CC request (there's no SysEx in Ableton Live). Now i suppose you want to hear it: http://soundcloud.com/bdupeyron/mb-tia-mantua-preset Voilà!!!
  14. Since the Switched On Bach album was released in 1968 and the Atari 800 was introduced in 1979, it seemed fitting that I would should start with the 1979 Atari and fade into the 1990 Yamaha TG-33. Brandonburg #3 third move.mp3 NOTES: Music File origin: Sheet Music VBURGM3.MUS for Atari RECORD.MUS for TG-33 RECORD.INF for TG-33 channel assignments Control Computer: 130XE Sequencer Software: MIDI Music System by Lee Actor Voice 1 - PAT9 Voice 2 - PAT10 Voice 4 - PAT8 MIDI out: MIDIMAX Sound Source: Atari 130XE (#2) MIDI in: Arduino Software: MONOSYN_1-Byte_Data_rC.ino Monitor output to mixer Software: ADSR0D.M65 (recompiled for each voice settings) (.Included READMIDC.M65) - PAT8.OBJ PAT9.OBJ PAT10.OBJ Loaded from ATARIMAX Cart. Yamaha TG-33 Sound Card VC3303 - Voice Data Card Multi C1-15 CLASSIC Voice 1 = Channel 5 Voice 2 = Channel 5 Voice 4 = Channel 4 Mixer: Behringer Xenyx 1202 FX Mic One input - Atari monitor port LINE IN 5/6 - Yamaha TG-33 FX : #3 MID HALL 1 Recorder: PC - Audacity 2.1.2 File: Brandonburg #3 third move.aup - Sync tracks and trim - Fade in and out TRACK12.atr
  15. I need serial (in/out) MIDI cable or MIDI interface schematic (scheme) which will works with Raster´s Midi Pattern Editor on ATARI 800 . http://raster.infos....tari/mpe2v3.zip Screenshots>
  16. My Catch-22: If I knew what I know now, I am not sure I would have started this project. But If I didn't start this project, I would not have learned what I know now. It seems like it has taken forever to finish the tracks but I'm not sure when it started. In October 2018 the prologue was written; that's only 10 months. If you consider I started experimenting with programing MIDI, it started when "Computer Blues" was modified to output midi commands through the 850's RS232 port; September 2016. I would expect that it took about 2 months of work from track one to twelve, if you only consider when inspiration and motivation were at sufficient levels to advance the project. Much thought was put into deciding if some of the tracks should be redone (they are not all my favorites). There is still a lot that can be done to the Arduino interface. The Atari Software could use a few more options. These changes will come in the future. Today, I am even more amazed at what Wendy Carlos was able to accomplish in 1968 to produce Switched On Bach. Just the fact that I didn't have to deal with the Atari detuning half way through recordings and the free multi track recording software is so much easier to use then tape; the lack of which would have stopped me in her tracks. ------------------------------------- Rough draft for the cd jewel case insert. SOP Jewl case draft.pdf
  17. Within the Atari 800 computer manual is a program called Computer Blues. "This program generates random musical notes to "write" some very interesting melodies for the programmed bass." Maybe the first program I typed in . That same program is in the 1030 XE manual. It was while listening to this program and trying to figure out what to do with an Arduino MIDI shield that I thought, "What would Computer Blues sound like if played through a synthesizer?" Gone is my MIDI Mate, CZ-101 and Roland keyboard controller. The TG-33 and DH-100 have been in storage for quite some time along with the ST and the USB to MIDI cord for the Windows computer. A Casio CTK-481 was acquired in a trade and has been neglected until now because now is the time to find out what Computer Blues would sound like on a synthesizer. I don't remember there ever being an easy way to output midi commands to a MIDIMAX (or MIDIMATE) using Atari BASIC. The more I learn about the MIDI controllers and the MIDI standard the easier it is to imagine experimenting using BASIC. Speed and timing may be a disadvantage for BASIC but a quick and easy way to implement ideas may be an advantage. The plan is to convert the SOUND commands to MIDI command data and send it out to the "R2:" port on the 850. "R2:" will be attached to a RS-232 to TTL converter shield attached to an Arduino Uno. The Arduino will read and retransmit the data through a MIDI shield to the sound synthesizer. The serial port baud rate limit of the 850 is 9600 and the MIDI port will be 31250. Shouldn't be a problem for the Arduino to keep up with the Atari. The RS232 Shield Link sprite Store http://store.linksprite.com/rs232-shield-v2-for-arduino/ LinkSprite RS232 Shield V2 for Arduino is being used to read the RS232 signal from the 850. This board has the option of setting jumpers to use D0 to D7 for the TD and RD lines. D5 and D6 are the first available pins and will require the SoftwareSerial library for communications. To test the shield, the "hello world" program from the RTC project was used with Bobterm. I had problems receiving the data until I switched the jumpers around. Someday I hope to be able to make the connections between RS232 devices and have it work the first time, but not today. The MIDI Shield New version https://www.sparkfun.com/products/12898 This SparkFun MIDI shield has been in my shield collection long enough to have been replaced by another version. The old version requires you to use the Hardware serial lines where as the new version allows you to cut some traces and make the new connections. The shield has a PROG/RUN switch that needs to be set to PROGram the Arduino or RUN the program. It is an experimenters board and has 3 push button switches and 2 analog resistors that can be used as programmable controllers. Pins D0 and D1 are used for serial communications and D2-4 are used by the push button switches. https://www.arduino.cc/en/Tutorial/Midi The shield can be tested using the program in the Arduino MIDI Tutorial (It’s a quick read). Connect a MIDI cable from the MIDI OUT on the shield to the MIDI IN of the synth. Stacking the shields makes all the necessary connections. There are no wires. If you don't use the shields a RS232 to MIDI OUT can be constructed for less then $25. A Uno knockoff and ultra compact TTL to RS232 converter can be had for less then $10 each. A 5Pin-DIN socket and 2-220 ohm resistors should be less then $5. Your biggest expense will be the 850 or PR: connection. Wrap it up All the parts seem to work. Next step will be to sit down and write the Arduino program to read the NoteOn data from the Atari and output it to the MIDI device. Then an Atari BASIC program to send the midi commands to turn on and off a note. When that happens the hard part will be over. References: You may find some of these interesting and informative. MIDI Reference Tables https://www.midi.org/specifications/category/reference-tables MIDI Message Chart- https://www.midi.org/specifications/item/table-1-summary-of-midi-message MIDI Control Change Messages https://www.midi.org/specifications/item/table-3-control-change-messages-data-bytes-2 MIDI note number chart http://newt.phys.unsw.edu.au/jw/notes.html How to read MIDI implementation chart(wish I had this 30 years ago) http://midi-tutor.proboards.com/thread/119/interpret-midi-implementation-chart Tutorial on midi data and file structures. Program examples for QuickBasic. MIDI Programming Part 1: MIDI File Basics - MystikShadows http://www.petesqbsite.com/sections/express/issue18/ MIDI Programming Part 2: Data Structures And Timing Formulas - MystikShadows http://www.petesqbsite.com/sections/express/issue19/ Atari's Sound System by Bob Cockroft - ROM Magazine #10 Gives Atari values for specific Notes and more http://atarimagazines.com/rom/issue10/sound_system.php Notes and Volts - Electronics, Guitars and Geekery http://www.notesandvolts.com/
  18. Who owns a new or old midi module or synthesizer, and has connected it to his TI-99/4A or other home computer. Which module / synthesizer Which interface, how connected Which software Around 1988 I had a Roland D10, Connected through a CLAB MIDI interface Software was Supertrack 64.
  19. Bach had the idea to write the second movement as 2 cords in one measure. Some believe that it was a place holder and Bach was going to finish the second movement at a later date and others say it provided a musician a starting point for improvisation. Wendy Carlos created a track that had me thinking her efforts were directly influenced by Bach's spirit. I'm not so lucky (or maybe your not so lucky). I took the notes of the cords and arranged them in sequence to produce the following. I'm not sure Bach would have approved of the somewhat haunting melody the sequence produced. Brandenburg No3 second movement.mp3 NOTES: Music File origin: IMPROV01.MUS - k-Pack Control Computer: 130XE Sequencer Software: MIDI Music System by Lee Actor Voice 1 - PAT8 Voice 2 - PAT6 MIDI out: MIDIMAX Sound Source: Atari 130XE (#2) MIDI in: Arduino Software: MONOSYN_1-Byte_Data_rC.ino Monitor output to mixer Software: ADSR0D.M65 (recompiled for each voice settings) (.Included READMIDC.M65) - PAT6.OBJ PAT8.OBJ Loaded from ATARIMAX Cart. Mixer: Behringer Xenyx 1202 FX Mic One input - Atari monitor port FX : #3 MID HALL 1 Recorder: PC - Audacity 2.1.2 File: Brandenburg no3 Second Movement.aup - Sync tracks and trim TRACK11.atr
  20. Seems the simpler the program the more I like the result. Prelude and fugue No2 in C Minor.mp3 Atari MUS and OBJ files SOPT8.atr NOTES: Music File origin: PANDF2R.MUS - entered from sheet music into MMS Control Computer: 130XE Sequencer Software: MIDI Music System by Lee Actor MIDI out: MIDIMAX Sound Source: Atari 130XE (#2) MIDI in: Arduino Software: MONOSNY_1-Byte_Data.ino Monitor output to mixer Software: SINGBYTE.M65 SINGBYTE.OBJ Loaded from ATARIMAX Cart. Mixer: Behringer Xenyx 1202 FX Mic One input - Atari monitor port FX : #3 MID HALL 1 Recorder: PC - Audacity 2.1.2 File: pandf2.aup Sound Edit - Sync tracks and trim - Pan and fade out
  21. I have 9 optocouplers setup to receive data from the Arduino for the SAM Rock You project. Eight for the MIDI data byte from the Arduino and 1 to signal the Trigger when new data is ready to be read by the Atari8. A tenth optocoupler needs to be added so that the A8 can let the Arduino know that it is ready for the next byte. That 10th optocoupler can indicate the status set using the Cassette Motor Control. The Cassette Motor Control line on the SIO port (Pin8) is used to turn the cassette motor on and off. I have used an accessory for the Diamond GOS that sets this bit to control the cassette for audio play back. Even though I wrote the accessory, I can't remember which bit to set but I remembered the program would set that bit to test the circuit. The circuit was put together on a breadboard for testing before soldering onto the prototype board. Preliminary tests proved that the optocoupler would switch states to achieve 2000 bytes/sec. Atari BASIC isn't going to outpace this circuit. The input side of the optocoupler was wired to SIO PIN 8(motor control) and PIN4(ground). The Arduino was programed to read a pin status set by the output of the optocoupler and then turning on/off an LED. The Diamond GOS "ON/OFF CAS" accessory successfully toggle SIO-Pin8 when activated. This simple Arduino program is used to read the optocoupler output attached to Arduino digital pin 4 and turn on the LED attached to pin 6. //check connection between A8 sio cassette //motor pin and Arduino int casMotorPin= 4; int ledPin= 6; void setup() { // put your setup code here, to run once: pinMode(casMotorPin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { if (digitalRead(casMotorPin) == HIGH){ digitalWrite(ledPin, HIGH);} else { digitalWrite(ledPin, LOW);} } Later the prototype was soldered together and added to the Arduino hardware board. The next step is to write the software for the Arduino to pass all relevant MIDI data to the Atari and a short Atari program to monitor the incoming data and test the data flow control. I suppose I should also look over the accessory source code to remind myself how to set the cassette motor control bit.
  22. Testing a simple MIDI interface I knocked up this morning...
  23. A major rewrite of the Arduino/Atari communication software was accomplished. It seems the Cassette Motor Control pin causes a spike when it switched. (You can hear it in some of the previous tracks.) BIT 7 of PORTA has been configured for output. Joystick 2 trigger can be used as BIT 7 if its ever needed. It took a couple of weeks of software trouble shooting to figure out that the hardware was the problem. The output power from the CMC was enough to trigger the optocoupler but the power from the joystick port was not. A resister was changed and the software seemed to be working the way it should. There still seems to be a click but is a little less noticeable. Sorry, I wasn't going to get technical. Brandenburg no3 First Movement.mp3 NOTES: Music File origin: BRAND.MUS - thanks to unknown person TRACK10.MUS - Recorded Control Computer: 130XE Sequencer Software: MIDI Music System by Lee Actor Voice 1 - PAT5 Voice 2 - PAT6 Voice 3 - PAT7 Voice 4 - PAT8 MIDI out: MIDIMAX Sound Source: Atari 130XE (#2) MIDI in: Arduino Software: MONOSYN_1-Byte_Data_rC.ino Monitor output to mixer Software: ADSR0D.M65 (recompiled for voice settings) (.Included READMIDC.M65) - PAT5.OBJ PAT6.OBJ PAT7.OBJ PAT8.OBJ Loaded from ATARIMAX Cart. Mixer: Behringer Xenyx 1202 FX Mic One input - Atari monitor port FX : #3 MID HALL 1 Recorder: PC - Audacity 2.1.2 File: Brandenburg no3 First Movement.aup - Sync tracks and trim TRACK10.atrTRACK10.atr
  24. After hearing Computer Blues through a MIDI synthesizer, I can understand how some parents feel while hearing their child's first recital. Its not so much listening to the music as it is hearing the potential. It is in this spirit that I post these zipped sound files. Atari computer blues 8.m4a - the original sound from the A8 with 8 as the speed Midicb piano.m4a - recorded the Casio CKT-481 synth at speed 1 Midich organ.m3q - Organ sound Midich organ and drum - Organ with drum pattern. computer blues.zip Download this for the .ATR of the A8 files and the Arduino sketch. MIDI CB - program .zip The technical side: I wanted to make as few changes to the original program as possible. Follow along with a listing of the program CBMIDI2.BAS. 1000-1050 Data statements were converted from Atari pitch values to MIDI Note numbers. 9 consolidate lines 1-6 and move 8 to 15. Free up some line numbers at beginning of program. 1 REM program title information. 2 GOSUB 3000 sets up RS232 port for output to Arduino. 3000 Open R2: at 9600 baud - no translation 2500 Send MIDI command data subroutine Replace SOUND command with data setup and call to 2500 subroutine NOTE ON: 260 CMD=144:MIDINOTE=JAM(CHORD,NT),VELOCITY=NT*10+65:GOSUB 2500 535 CMD=144:MIDINOTE=LOW(CHORD):VELOCITY=60:GOSUB 2500 540 CMD=144:MIDINOTE=BASE(CHORD,THNOT):VELOCITY=60:GOSUB 2500 NOTE OFF: 700 CMD=128:MIDINOTE=LOW(CHORD):VELOCITY=0:GOSUB 2500 710 CMD=128:MIDINOTE=BASE(CHORD,THNOT):VELOCITY=0:GOSUB 2500 At this point the Computer Blues music was recognizable, although slow. The synth is able to play up to 16 notes at a time. This allowed 14 melody notes (+2 for the base) to be playing at the same time. When the 15 note was added the first note would tuned off. The following line was added to turn off the melody note before playing the next. Once in a while you'll notice that a note duration seems to be shortened. When the LASTNOTE = MIDINOTE, line 265 will turn off the melody note that was just started in line 260. This little quirk didn't degrade the song quality and may perhaps improved it. 265 CMD=144:MIDINOTE=LASTNOTE:VELOSITY:0:GOSUB 2500:LASTNOTE=JAM(CHORD,NT) The original goal of this project has been reached. It is possible to write Atari BASIC programs that can output MIDI data to a MIDI device, if you have an 850 and an Arduino with RS232 in/MIDI out. The speed of BASIC and the 850 interface will definitely impact most results. Trying to optimize the Atari BASIC code should increase its functionality. Then you also have to ask what happens when you let the Arduino do some of the work? Of course you could port Computer Blues directly into the Arduino, but where's the fun in that? Links to the two proceeding blogs The Hardware http://atariage.com/forums/blog/572/entry-13269-midi-computer-blues-setting-up-the-hardware/ Testing the Hardware. http://atariage.com/forums/blog/572/entry-13277-midi-computer-blues-note-on-note-off/
  25. hey guys , i have a mssiah synthcart from 8-bit ventures for my c-64 and i was wondering if there exists anywhere a synthcart for the atari 8-bit machines to access the pokey chip in a similar way as mssiah. i have looked every where and even asked 8-bit ventures if they would do one and they said they had no intentions of making one . if one does'nt exist, is there anyone that knows basic well enough to make something like this ? could put the program on a flashcart maybe ? and modify the computer with midi? Also does anyone do midi modifications to the 800xl ? i just really want to be able to control the pokey chip through my daw and midi sequence it like i do with my c64. i love the way the pokey sounds , probably even over the SID. any good direction on this would be awesome . please help i have been trying for well over a year for a solution . thanks alot
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