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 Forum index » DIY Hardware and Software
DIY Vocoder projects?
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goodrevdoc



Joined: Sep 11, 2006
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PostPosted: Tue Jun 19, 2007 9:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the kind words everyone, here's a pic of the just finished, smaller I/O board. Beware, there seem to be some labelling errors on the component layout for this one. I'll post P&P layouts and porject notes if and when I get it operational.
-justin
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goodrevdoc



Joined: Sep 11, 2006
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PostPosted: Tue Jul 17, 2007 12:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

SUCCESS!!! wave
After frying a couple of op-amps, and one slightly more expensive compander, this thing is now vocoding like the dickens! Very Happy Very Happy Very Happy Very Happy
I'll try to post some samples later, and will definately fix my layout errors and post some PDF's of the project info. I just can't beleive it, this is by far my new favorite toy, and I didn't even have to learn Japanese to make it.(which I briefly considered doing, deep in the throes of debugging) Out the door now, but like I said, I'll try to get some sounds up later...
-justin
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Wild Zebra



Joined: Apr 28, 2005
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PostPosted: Tue Jul 17, 2007 12:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

Congrats, looking forward to some samples and documentation.
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psylux



Joined: May 15, 2007
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PostPosted: Tue Jul 17, 2007 1:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

very interested, can't wait for the details!
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crashlander42



Joined: Oct 21, 2006
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PostPosted: Tue Jul 17, 2007 5:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

Very nice. Hope to hear samples soon. I'd also love to get my greedy little hands on those PDF's! Very Happy
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goodrevdoc



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PostPosted: Tue Jul 17, 2007 6:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

OK, as promised, here's a quick & dirty sample. It was recorded on my cellphone. Believe it or not, that's the easiest & best way for me to record right now, other than reel-to-reel. Embarassed It was done with my trusty Moog MG-1 as the instrument source with a sawtooth and not much filtering. Microphone is an SM57. Amp was a crappy little practice amp I keep under my bench for just such occasions. It sounds much better than this, but this sample does it pretty adequate justice. As for the project file, It should be finalized in the next week or so, but right now one of the op-amps is still running pretty hot, so I want to get that nailed down before I do anything else. Also, thanks for the kind words everyone, its nice to have some support when attempting the largely futile. OK, enough blabbering, to the sample already!
-justin


Vocoder.wav
 Description:
Hello electro-music.com... This is my new Okita vocoder...

Download
 Filename:  Vocoder.wav
 Filesize:  15.74 KB
 Downloaded:  2606 Time(s)


Last edited by goodrevdoc on Wed Nov 07, 2007 12:35 am; edited 1 time in total
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crashlander42



Joined: Oct 21, 2006
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PostPosted: Tue Jul 17, 2007 6:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sounds good. Especially considering the recording conditions. I'm sold. Great. Another project. Very Happy Should I etch off the CAG PDF's or are you going to post touched up pdf's?
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goodrevdoc



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PostPosted: Tue Jul 17, 2007 6:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

The CAG pdf file is not to scale, nor is the one over at colin's site. Also they are bottom views. (not oriented for P&P) I took the CAG files, imported them into Osmond Quartz, and painstakingly re-did them many moons ago. The smaller boards also had a few small errors in them, so they were fixed along the way. In addition, once assembled, I found a few additional errors that I had made, so I would like to incorporate them into the file before I release them. Then too, there is the hot Op-Amp. But if you want to start getting ready, the board sizes are a whopping 8"x6" and 5"x4", the former being the biggest thing I've ever P&P'd or etched, easily.
-justin
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crashlander42



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PostPosted: Tue Jul 17, 2007 9:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

excellent. I have copperboard to accomidate that. Very Happy Just not a tub big enough for it.
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goodrevdoc



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PostPosted: Tue Jul 17, 2007 11:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

I had the same problem... Smile
-justin
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goodrevdoc



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PostPosted: Tue Nov 06, 2007 9:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

So I just noticed that the last post I made in this thread was in mid July- a sad testament to the fact that life keeps getting in the way of SDIY. A few days ago, i got a PM from a kind gent asking the status of this project. I replied, "It's almost done I just have to type out a parts list and a few build notes." As I read this, I realized I was but an hour away from posting this for the few months. Embarassed So tonight I took about an hour and finished it up. So here you go, the Okita Vocoder:


Okita Vocoder.zip
 Description:
Okita Vocoder PnP and Project files.

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 Filename:  Okita Vocoder.zip
 Filesize:  9.11 MB
 Downloaded:  2108 Time(s)

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crashlander42



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PostPosted: Tue Nov 06, 2007 10:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

Shocked

Awesome work.

Looks like it's time for me to make a big parts order.

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etaoin



Joined: Jun 30, 2005
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PostPosted: Tue Nov 06, 2007 11:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Great stuff. I was actually looking into building the Elektor vocoder, but this is a lot less work Wink
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bubblechamber



Joined: Nov 04, 2006
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PostPosted: Tue Nov 06, 2007 11:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

really nice work. looks like I'll be building a vocoder or 2 this winter. great job.
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23isgood



Joined: Nov 18, 2006
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PostPosted: Tue Nov 06, 2007 11:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

Very nice job! I absolutely love vocoder's. My favorite is the Roland VP330. Could you post a sample please? I could not find the previous sample you put up. Also where could I find the schematics.

thanks,
pete

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etaoin



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PostPosted: Tue Nov 06, 2007 11:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/voc-freq-res-layout.gif

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/voc-freq-res-pcb.gif

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/voc-headphone-amp.gif

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/voc-main-layout-pcb.gif

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/voc-power-amp%20pcb.gif

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/vocoder--main-board.gif

http://experimentalistsanonymous.com/diy/Schematics/OOP%20Japanese%20Electronics%20Book/vocoder-freq-response-board.gif

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goodrevdoc



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PostPosted: Wed Nov 07, 2007 12:42 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for putting up those links, Etaoin. Also, the link to the original scanned article is at the beginning of this thread. I just put the sample back up as well. I may try the Elektor next, but I believe there are some weird parts to be had with that one...
-justin
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etaoin



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PostPosted: Wed Nov 07, 2007 12:44 am    Post subject: Reply with quote  Mark this post and the followings unread

I'll have a quick check for the Elektor one, but I think the weirdest part in there is the 3080 (which isn't that weird). Only problem I had were the terrible PCB scans.
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etaoin



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PostPosted: Wed Nov 07, 2007 12:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Okay, also TDA1034. One could probably use the NE5534 there.
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goodrevdoc



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PostPosted: Wed Nov 07, 2007 10:04 am    Post subject: Reply with quote  Mark this post and the followings unread

I was thinking about those 21 pin Siemens connectors. I searched for some awhile ago with no luck, but not very hard. The 3080 is no problem and the TDA1034 should only be a minor bump...
-justin
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23isgood



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PostPosted: Wed Nov 07, 2007 4:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sounds cool! I can imagen all the different type of sounds you could get by patching in different synths. I would love to hear some more samples. I really want to build this, but with the Klee I will be pretty busy for a minute. A future project for sure.

thanks
pete

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etaoin



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PostPosted: Thu Nov 08, 2007 12:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I was thinking about those 21 pin Siemens connectors. I searched for some awhile ago with no luck, but not very hard.


Yes, European connectors... easier to get over here.

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TheAncientOne



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PostPosted: Thu Nov 08, 2007 5:58 am    Post subject: Reply with quote  Mark this post and the followings unread

I still have the original elektor articles, I think. I did wonder about a batch of boards, being as there are several of the main filter boards. I think revising the layouts might be a good idea, in order to have options for different capacitors, as Jurgen did on his excellently thought out Tau pipe boards, (I really hate it when you have to faff around finding the caps in the right pin spacing as well as value, and it is more difficult to experiment).

I built two of these, for friends, back in the day, using Elektor's own boards. They worked well, though I have heard better. The ability to patch out the filter is a definite plus.

The other one I built was the ETI design, done by Tim Orr, of EMS. That was a good design, but needed a huge main board, about 16x6 or something, which id definitely not practical unless your name is Jim Patchell, (that guy's boards are awesome!). This sounded a bit nicer than the elektor, but wasn't patchable, it might also be that by then I was into using a sweep gen and display, had a capacitance bridge, and hand tuned the filters, the Elektors were just done 'straight out of the box', and in a hurry, for an experimental vocal group, (they thought their grant would cover a couple of EMS's, and when it didn't, were under time pressure for a performance). I wonder what happened to them -

I did think of doing a re-work of the ETI, beginning with stripboard in a rackframe like the Elektor, and allowing patching.

This thread has reminded me to take a look.

I may be some time.......

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goodrevdoc



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PostPosted: Thu Nov 08, 2007 12:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Yes, European connectors... easier to get over here.


I see. If I ever actually have a go at it, I may have to hit someone up on that side of the pond then.

Quote:
I built two of these, for friends, back in the day, using Elektor's own boards. They worked well, though I have heard better. The ability to patch out the filter is a definite plus.

The other one I built was the ETI design, done by Tim Orr, of EMS.


I have the files from CAG for both of these, but after thinking it over for awhile, the elektor is probably the way to go. An 8X6 board was hard enough to PnP and etch, 16X6 is surely a nightmare!!! (although totally possible)
-justin
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etaoin



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PostPosted: Thu Nov 08, 2007 12:43 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:

I see. If I ever actually have a go at it, I may have to hit someone up on that side of the pond then.


At least I think these ones sold by Conrad are the right ones (pictures are 13 pins, they also sell 21 pins)


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