ivop Posted September 28, 2020 Share Posted September 28, 2020 (edited) Here's v0.2beta3. All of the UI should be functional now. It does not promise it can actually start the sweep yet But you can set its parameters. Out of beta, it will sweep! Channel(s) and Start and End value are dependant on the Resolution setting. Start, End and Interval can increased and decreased by one at the time with the CTRL-keys displayed left and right of its status. All other CTRL-keys are looping through three or four options. No need for a second key. Source is here. In 8-bit mode, increasing/decreasing start and end is tollerable, but in 16-bit mode it might not be the same if you want to sweep $6000-$7000 I'm thinking about a way to speed up in 16-bit resolution. Is there a chart of which CTRL-SHIFT-key combinations work? Any regressions? Or any suggestions? Am I missing a certain "sweep" setting? Thanks. pokeyexp-v0.2beta3.xex Edited September 28, 2020 by ivop edit: troug->trough :) 2 Quote Link to comment Share on other sites More sharing options...
makary Posted September 28, 2020 Share Posted September 28, 2020 Hey Ivo, how about turning off the keyboard click / key stroke sound? Quote Link to comment Share on other sites More sharing options...
ivop Posted September 28, 2020 Share Posted September 28, 2020 (edited) 25 minutes ago, makary said: how about turning off the keyboard click / key stroke sound? It is muted. 74: mva #$ff $02db ; NOCLIK, disable key click Do you use AltiraOS by any chance? It seems not to work with that, but @phaeron has not responded yet. Standard Atari XL ROMS work. It should even work on a 600XL (not tested). But thanks for the suggestion. One of my earlier versions indeed had the key click on Edited September 28, 2020 by ivop edit: added missing word and elaborated Quote Link to comment Share on other sites More sharing options...
makary Posted September 28, 2020 Share Posted September 28, 2020 Oh, I do indeed Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted September 29, 2020 Author Share Posted September 29, 2020 Sweep information: $8x with poly 9, every 7 steps makes a differing tone. Every 11 steps in $0x poly 9 (and also maybe $8x) is intermittent silence or a tone $2x uses steps of 31. This means I will have to add a second square wave table to $2x 16-bit, amongst other things. $4x and $Cx both depend on multiples of 3 and 5. Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted September 29, 2020 Author Share Posted September 29, 2020 (edited) Further down the road, we may want to add 24-bit and 32-bit to the mix. This is for when we combine hi-pass with either the two-tone or the 16-bit settings. In particular, the 16-bit plus 1.79 on both clocks uses the 32-bit sweep. You put a 16-bit value into the first channels, and another 16-bit value into the last two channels, with 16-bit, 1.79 on both, and a hi pass from first to third channels, to use this function. Meantime, we may be able to get away with sweeping sections of the notes at a time. Edited September 29, 2020 by Synthpopalooza Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted September 29, 2020 Author Share Posted September 29, 2020 Another bug: Two tone mode is $8B, not $0B ... without it, it doesn't engage. Quote Link to comment Share on other sites More sharing options...
ivop Posted September 29, 2020 Share Posted September 29, 2020 10 hours ago, Synthpopalooza said: Two tone mode is $8B, not $0B ... without it, it doesn't engage. Thanks for noticing! Fixed on github. Quote Link to comment Share on other sites More sharing options...
ivop Posted September 29, 2020 Share Posted September 29, 2020 (edited) Here's v0.2beta4. I decided to stay away from CTRL-SHIFT combinations, because not all of them are detectable. Instead, you can now select the up/down step size for Start/End/Interval values. Bonus is that you have four step sizes now, instead of two CTRL-T only flashes the background UI is too crowded to do something with tuning tables. I intend to create a separate screen where several 8-bit and 16-bit tuned notes can be selected. Different base clocks, selection of used channel(s), optionally second pokey (handy for 24-bit or 32-bit settings), et cetera But that's for later. And I might have to drop the "runs on a 16kB machine" requirement. First, I intend to implement the sweep. Sweep Parameters line will show Press START etc... again, adjust start/end values if nonsensical, run the sweep. Any regressions? Do the CTRL-SDWE controls work for you, with the added CTRL-U step size? Bugs fixed? Thanks for any feedback. As I got no response to my previous question, I assume @Synthpopalooza does not mind I "pollute" his thread with my musings pokeyexp-v0.2beta4.xex Edited September 29, 2020 by ivop 1 1 Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted September 29, 2020 Author Share Posted September 29, 2020 oh it's fine. My original question got answered anyway lol Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted September 30, 2020 Author Share Posted September 30, 2020 So after some preliminary experimentation: $2x is not useful in two-tone mode, except for those square tones which occur every 31 steps. You'll probably need 1.79 clock to make use of it $8x plus poly9 has some guitar tones in two-tone, but you will need 1.79 clock $Cx two tone shows some promise in either base 64 clock or 1.79. In 64 khz it is set up rather like the $Ax two tone mode, but using the standard $Cx 8-bit table instead. $0x plus poly 9 two tone might have something, in the 1.79 clock 2 Quote Link to comment Share on other sites More sharing options...
ivop Posted October 1, 2020 Share Posted October 1, 2020 (edited) On 9/29/2020 at 7:52 PM, Synthpopalooza said: oh it's fine. My original question got answered anyway lol Okay, great! I'll start a proper thread once v0.2-release is there. For now, here is v0.2beta5 Everything you see, except for 16-bit sweeps, should work now. That includes 8-bit sweeps! Thanks to Altirra I caught a last moment bug (classic lda 0 in stead of lda#0). 8-bit resolution sweeps. You can set channel, start, end, interval, the amount of time you hear the sound, the amount of pause in between , and poly reset. The last one is not particularly useful, as it is pretty random. During manual exploration, you just press - or [ a couple of times to hear the right timbre or to check if there are different timbres, but the automated version is not synced in any way to get a certain timbre. But, it should still contain the proper base frequency. Except for the modulos that have silence sometimes Anyway, should be good enough to do some sweeps to get an impression. I lowered the lowest play time to 0.1s (rest: 1s, 2s, 4s), so it easy to test a sweep (and set gap time to 0s). The higher play and gap times are for future automated FFT frequency detection. And last but not least, there's a separate PAL and NTSC version now. Might be merged in the future, but this is easier Play and gap times should be adjusted to PAL/NTSC frame times and, if used on proper hardware/emulation settings, the sounds can be slightly different, too. Countdown is a GTIA buzzer pokeyexp-v0.2beta5-ntsc.xex pokeyexp-v0.2beta5-pal.xex Edited October 1, 2020 by ivop 1 Quote Link to comment Share on other sites More sharing options...
ivop Posted October 1, 2020 Share Posted October 1, 2020 (edited) Here's an example: Because of the neighbours, it's just $85 But seriously, this is a sweep of $8x on channel 1, clocked at 1.79MHz with polycounter 9. Start at 3. Interval 7. sweep-8x-179-poly9-mod7.mp3 Edited October 1, 2020 by ivop 1 Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 1, 2020 Author Share Posted October 1, 2020 Yes I know that setting well ... electric guitars with AUDF2=$00. I did actually manage to document that one? 1 Quote Link to comment Share on other sites More sharing options...
ivop Posted October 1, 2020 Share Posted October 1, 2020 (edited) With AUDF2=$00, do you mean a joined 1+2 and 2 silent? And then $00 + interval $07 on AUDF1? (instead of the 8-bit mode I used, where the period starts at $03 with an interval of $07) Edited October 1, 2020 by ivop elaborated on my 8-bit sweep :) Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 2, 2020 Author Share Posted October 2, 2020 (edited) Yep that was it ... AUDCTL=$D0 ... three note tables. On AUDF2=$00, you get a mod 7, and a non mod 7 table. The third one requires inverse frequency ratios between AUDF1 and AUDF2, and can make warbling vibrato guitars, where the vibrato speed can be modulated. All of this has been documented in my note table. Edited October 2, 2020 by Synthpopalooza Quote Link to comment Share on other sites More sharing options...
ivop Posted October 2, 2020 Share Posted October 2, 2020 (edited) I found this today: https://aubio.org/ and specifically its command line utility aubiopitch, which is almost exactly what we need Looks promising IMHO. This is an analysis of previous done sweep. Cut-off the countdowns and normalized to 0dB. Next time, record at $8a or something. Spoiler $ aubiopitch -i sweep-8x-179-poly9-mod7.wav -B 48510 -H 48510 -u hertz -v -s -90 -p yinfast using source: sweep-8x-179-poly9-mod7.wav at 44100Hz pitch method: yinfast, pitch unit: hertz, buffer_size: 48510, hop_size: 48510, tolerance: 0.000000 0.000000 3470.160889 1.100000 1737.677612 2.200000 1157.762695 3.300000 867.133057 4.400000 347.094391 5.500000 578.728455 6.600000 495.760956 7.700000 433.681305 8.800000 385.712189 9.900000 347.095459 11.000000 315.449280 12.100000 289.225067 13.200000 267.004791 14.300000 247.881500 15.400000 231.346832 16.500000 216.935318 17.600000 204.153671 18.700001 192.793747 19.799999 182.668777 20.900000 173.535233 22.000000 165.258133 23.100000 157.748917 24.200001 150.900894 25.299999 144.605408 26.400000 138.814713 27.500000 133.489120 28.600000 128.542297 29.700001 123.942223 30.799999 119.674324 31.900000 115.690910 33.000000 111.950638 34.099998 108.449608 35.200001 105.173851 36.299999 102.075935 37.400002 99.154320 38.500000 96.406044 39.599998 93.801765 40.700001 93.802437 read 40.81s (1799871 samples in 38 blocks of 48510) from sweep-8x-179-poly9-mod7.wav at 44100Hz Edit: Window at 4.4s seems off. I don't know why, yet. Think it should be times two, i.e. 694Hz. Edit2: yin and yinfast are the only two pitch detection type that consistently show a downward trend. All the other methods show garbage frequencies. Edit3: left column is time in seconds, right column is frequency in Hertz Edit4: fixed some missing words, lol Edited October 2, 2020 by ivop 1 Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 2, 2020 Author Share Posted October 2, 2020 awesome. Grab my note table from the 7800 forum and try those settings I have documented already, and maybe we'll see how well I did the old fashioned way lol Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 2, 2020 Author Share Posted October 2, 2020 https://www.liutaiomottola.com/formulae/freqtab.htm This may be of use too. Gonna play with this tonight. Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 2, 2020 Author Share Posted October 2, 2020 Also, maybe try grabbing the two tables here, using $4x reverse 16 AUDCTL=$50 and run them through, see how accurate I did on my tunings. Quote Link to comment Share on other sites More sharing options...
ivop Posted October 2, 2020 Share Posted October 2, 2020 (edited) 1 hour ago, Synthpopalooza said: https://www.liutaiomottola.com/formulae/freqtab.htm This may be of use too. Gonna play with this tonight. Keep in mind that these tables are tuned to A=440Hz A4 -- 440Hz -- 0.773m -- Tuning reference note You can take any value in the neighborhoud of 440Hz for the A4 reference note. Some people swear by 432Hz. For ehm.... reasons. You can google it. And a lot of orchestras over the world tune their whole arsenal of instruments to a lot of varying frequencies for A4. 4 hours ago, ivop said: 7.700000 433.681305 This could be our A4 I'm currently working on 16-bit sweeps. I have an idea to easily do reverse 16-bit, too. After that, we'll compare frequency tables ? I also want to merge PAL and NTSC again. It's not too much trouble, and in the end there's just one binary, which I like ? Edited October 2, 2020 by ivop Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 2, 2020 Author Share Posted October 2, 2020 Well, there was a tuning table for $Ax 8-bit someone did, tuned to A4=432 or so ... which apparently allowed for greater octave range. For standard documenting purposes though, A4=440 is the best way. We can always retune as needed. 1 Quote Link to comment Share on other sites More sharing options...
ivop Posted October 2, 2020 Share Posted October 2, 2020 (edited) 2 hours ago, Synthpopalooza said: Well, there was a tuning table for $Ax 8-bit someone did, tuned to A4=432 or so ... which apparently allowed for greater octave range. For standard documenting purposes though, A4=440 is the best way. We can always retune as needed. Yes. Once we have all kind of sweeps in a spreadsheet (by frequency in Hertz), we can calculate all kinds of optimal tunings for different keys. Pure intonation, and equal temperament tuning. And which combinations of instruments work best together in specific keys, where A4 can be anything between 430Hz and 450Hz. Fascinating Edited October 2, 2020 by ivop 1 Quote Link to comment Share on other sites More sharing options...
ivop Posted October 3, 2020 Share Posted October 3, 2020 (edited) Here's v0.2beta6. New: 16-bit sweeps work! Example: Joined 3+4 with 3 @1.79. Sweep with interval of $FB, just because it's not $FF. Short play time (0.1s) and no gap time (0s). Press START to sweep I tested all eight combinations, and they should work. Four times 16-bit channel combinations, and four times reverse 16-bit channel combinations where 2+4 turns into 4+2 (LSB/MSB swapped), etc. Please explore Edit: the sweep was done with Alitrra emulating a 600XL with 16kB, so this confirms it should work on a 16kB machine. pokeyexp-v0.2beta6-ntsc.xex pokeyexp-v0.2beta6-pal.xex sweep-16bit-Ax.mp3 Edited October 3, 2020 by ivop Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted October 3, 2020 Author Share Posted October 3, 2020 Looks good. In 16-bit how do you get it to step through all 65,536 combinations? Or can it only be done one 256 block at a time? Quote Link to comment Share on other sites More sharing options...
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