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MIDI Interface


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#126 ivop OFFLINE  

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Posted Tue Nov 7, 2017 12:57 PM

Courier just came by!

midirevb-pcb.png

 

Must say I really like the yellow PCB w/ black silkscreen!

 

Going to build one tomorrow, but some people might like to look at pcb-pr0n ;)

 



#127 Level42 OFFLINE  

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Posted Tue Nov 7, 2017 1:09 PM

Not a fan of that color combination. Reminds me of ancient radio PCBs for some reason.....but in the end it's personal,taste :)

#128 ivop OFFLINE  

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Posted Tue Nov 7, 2017 1:47 PM

Yeah, but you can discuss taste endlessly ;)

 

As a lifetime Prince-fan, I was really disappointed that I didn't like Purple and Gold PCBs. But now I have Peach and Black! :)

 

But seriously, this was just an experiment to see what it looked like. Maybe I'll try blue next time. Or open a poll before doing a large order?



#129 mytekcontrols OFFLINE  

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Posted Tue Nov 7, 2017 5:56 PM

Courier just came by!

attachicon.gifmidirevb-pcb.png

 

Must say I really like the yellow PCB w/ black silkscreen!

 

Going to build one tomorrow, but some people might like to look at pcb-pr0n ;)

 

 

I like it  :thumbsup:  :) .

 

- Michael



#130 David_P ONLINE  

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Posted Tue Nov 7, 2017 9:42 PM

The colours make me think of a 400 keyboard... so I like it.



#131 Matej OFFLINE  

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Posted Wed Nov 8, 2017 12:51 AM

PCB looks very nice.Will you 3d print case in XE light gray color?

And what Dreamblaster I should buy?

#132 ivop OFFLINE  

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Posted Wed Nov 8, 2017 12:14 PM

Yes, probably gray, but in the end it depends on the options provided by the printing co.

If I were you, I wouldn't buy the Dream Blaster S2 yet. I'm thinking of including an option where you buy the whole package, including the DBS2. Even if I don't get a discount if I order a large batch of them, it will save shipping cost :)

 

Also looking into 3D printing a SIO connector. Would be nice if one could buy a completed, fully functional device which needs no further soldering.

 

Status update: haven't received the cinch jacks yet, so the speakers are hanging of the pin header on the right, but otherwise the REV B PCB is fully functional! Tested IN, OUT, THRU, IN or OUT connected to the Wave Blaster port. Everything's fine so far. Sorry, no pictures yet...

 

Edit: spotted an error in the silkscreen. It says BC547, but that should be BC549.


Edited by ivop, Wed Nov 8, 2017 12:15 PM.


#133 Level42 OFFLINE  

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Posted Wed Nov 8, 2017 5:48 PM

Maybe it's me, but that Dream Blaster doesn't really sound all that great IMHO....I guess it's supposed to be a retro thing ?

#134 ivop OFFLINE  

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Posted Thu Nov 9, 2017 2:10 PM

Well, it's wave table technology, which is not used in modern synths anymore, so yeah, it's retro. But retro is like totally in ;) [1]

 

Again, I guess it's a matter of taste. Most (all?) wave blaster boards are bad at electric guitars, some excel at brass, others are better at strings, quality of percussion varies, et cetera...

 

But nothing stops you from connecting a better GM sound module. Also thinking about other cards in the future. There are more interesting single chip synths available which could be adapted to the wave blaster port standard.

 

 

 

[1] My dad bought a SNES Mini a couple of days ago; his first game console!



#135 Matej OFFLINE  

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Posted Fri Nov 10, 2017 9:10 AM

I am doing:
Pokey
YM
(+ in future:NES,GB,Opl3,Genesis)
Presets for DreamblasterX2.
So you will have 81 channel polyphony Pokey or Atari ST soundchip.

#136 ivop OFFLINE  

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Posted Fri Nov 10, 2017 11:42 AM

Small update:

 

I have decided to replace the RCA PCB mount jacks with panel mount. The ones I just received are the inverse of my footprint, even though the (now missing) Ali ad had them "right". What does this mean?

 

1) RCA footprints will be replaced by just four soldering pads for small wires

2) the housing will have all (audio) holes closed by default like Mathy suggested, two cinch or one 3.5mm jack can be opened when needed (i.e. they material is thinner than the wall thickness)

3) the acquired PCB space can be used for the stereo to mono mix for SIO Audio In

 

About the 3rd point, I prototyped that connection and I don't really like it, because you can hear all the SIO activity (even when muted) through the audio signal for every command send to MIDI Out, but if you really want that option, I'll implement it in the final version.


Edited by ivop, Fri Nov 10, 2017 11:50 AM.


#137 Mathy OFFLINE  

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Posted Fri Nov 10, 2017 6:20 PM

Hello Ivo

 

I have decided to replace the RCA PCB mount jacks with panel mount. The ones I just received are the inverse of my footprint, even though the (now missing) Ali ad had them "right". What does this mean?

 

1) RCA footprints will be replaced by just four soldering pads for small wires

2) the housing will have all (audio) holes closed by default like Mathy suggested, two cinch or one 3.5mm jack can be opened when needed (i.e. they material is thinner than the wall thickness)

 

1) Why not leave the RCA footprints in?  The holes can be used to solder in a cable if that's the choice of the user, but PCB mount jacks would still be possible for those who want them.  "Panel mount" means you have to screw the jack to the housing.  Not everybody likes that.

2)  :D :grin: :-D

 

Sincerely

 

Mathy


Edited by Mathy, Fri Nov 10, 2017 6:20 PM.


#138 ivop OFFLINE  

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Posted Sat Nov 11, 2017 3:46 AM

1) Why not leave the RCA footprints in?  The holes can be used to solder in a cable if that's the choice of the user, but PCB mount jacks would still be possible for those who want them.  "Panel mount" means you have to screw the jack to the housing.  Not everybody likes that.

 

Yeah, guess you're right. Found out it was the KiCad footprint I relied on that was wrong. So I will reverse the polarity of the current footprint. Still have to find some place for the stereo downmix and jumpers for sio audio in.



#139 Irgendwer OFFLINE  

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Posted Sat Nov 11, 2017 4:06 AM

Still have to find some place for the stereo downmix and jumpers for sio audio in.

 

A SMD oscillator would free a lot of space without being tiny...


Edited by Irgendwer, Sat Nov 11, 2017 4:06 AM.


#140 ivop OFFLINE  

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Posted Sat Nov 11, 2017 4:25 AM

Thanks. I'll consider it. Currently I'm opting for putting them under the LS590. Clock divider jumpers can move down a little, so there's enough room for the sio audio jumpers. But if it gets ugly, I'll look into a smaller oscillator.



#141 yerzmyey OFFLINE  

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Posted Thu Nov 16, 2017 5:28 AM

ivop:

 

> http://www.serdashop.com/waveblaster

> Feature creep? What do you think?

---------------

I think it's an excellent idea. I'd go for it.

Most interesting.



#142 ivop OFFLINE  

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Posted Thu Nov 16, 2017 5:57 AM

> http://www.serdashop.com/waveblaster

> Feature creep? What do you think?

---------------

I think it's an excellent idea. I'd go for it.

Most interesting.

 

Yeah, I have decided to include the port. The actual Dream Blaster S2 will be optional at the time I start taking orders. Currently I'm finalizing the design and trying to fix the SIO cable problem, either source them from somewhere or make them myself. As you might have seen in the 3D SIO plug thread, my first attempt failed, but I have other options to explore... :)



#143 _The Doctor__ OFFLINE  

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Posted Thu Nov 16, 2017 6:48 AM

what is the advantage of this over the midi mate midi master for the 8 bit or are they functionally equivalent

 

of course Best has now doubled the price from 69 on the midi master and started the whole song and dance... I know for a fact they got them for next to nothing... they had cleaned out two people at the time and have a glut of software and hardware from the two... but if that's the business model that's also probably why I don't by from them anymore... because you know we just found one or two again... give me a break... can you say cases of em?


Edited by _The Doctor__, Thu Nov 16, 2017 7:17 AM.


#144 yerzmyey OFFLINE  

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Posted Thu Nov 16, 2017 7:35 AM

Hm. So anyway I would be interested in such a soundcard, I think. With Dream Blaster S2 onboard, inside of a case and so on. :)



#145 ivop OFFLINE  

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Posted Thu Nov 16, 2017 11:25 AM

what is the advantage of this over the midi mate midi master for the 8 bit or are they functionally equivalent

compare.png

 

The main attraction of my device is probably the option of a built-in synth, connected to the Wave Blaster inside port.

 

I have chosen not to support Non-MIDI triggers over SIO, mainly because it's obsolete but also because I have no hardware to test it. But if anyone has a spare Linn LM-1 or Oberheim DMX and is willing to donate it to the cause, my opinion might change ;) :D

Triggers over the joystick port will probably work, but requires an additional cable similar to MIDI Mate.

 



#146 _The Doctor__ OFFLINE  

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Posted Thu Nov 16, 2017 11:34 AM

nice,

while I never saw sio trigger get in the way years back, with all the stuff made since then, it's probably best not to go there..

 

joy trigger is a good compromise. I'd stick with that idea....



#147 _The Doctor__ OFFLINE  

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Posted Thu Nov 16, 2017 11:58 AM

 ah the question is... miditrack software needs the oscillator via sio to recognize the midi interface... without it it wont run... this will provide that as you already have an exact clock. correct?



#148 ivop OFFLINE  

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Posted Thu Nov 16, 2017 12:14 PM

Yes, that's what I call "Exact Clock"in the table. Probably should have called it External Clock or something. There's indeed a 31250 Hz clock on SIO Clock Input.

 

BTW all software that does not require an external clock, also works perfectly fine, like Ireneusz' MidiPlay 1.3.


Edited by ivop, Thu Nov 16, 2017 12:16 PM.


#149 _The Doctor__ OFFLINE  

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Posted Thu Nov 16, 2017 8:16 PM

okay with the joy trigger option this will be the most complete and wonderful midi for our 8 bit thus far....

what's your ball park on price in USD?



#150 Level42 OFFLINE  

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Posted Fri Nov 17, 2017 3:46 PM

I picked up this today...... the specs said it could do general MIDI and I REALLY like it's sound (esp. compared to that wavetable thing):

 

 

 

 

I must say that getting a MegaSTE also helped in deciding to get this one :)


Edited by Level42, Fri Nov 17, 2017 4:43 PM.





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