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 Forum index » DIY Hardware and Software » Jürgen Haible designs
Bringing the Vocoder to life
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zthee



Joined: Feb 20, 2008
Posts: 414
Location: Stockholm

PostPosted: Sun May 06, 2012 6:04 am    Post subject: Reply with quote  Mark this post and the followings unread

So I did the changes suggested by Sound. The things I had to change in the changes was the noise level. Cause even with the noise level trimmer turned down it was still 4x higher than the replacement signal. So I reverted back to the 18K / 100K setting, which brought it down to a better level..

I'm not sure how to adjust the voiced / unvoiced detector. There's only like 3 different settings to it - Either there is no action at all, there is just some action (I.e. Say "T" and there will be a burst of noise, but it sounds imho a bit strange..) or a 3rd where it's a mix of everything. I'm not sure which I like the best. But if I set it to the 3rd option and then adjust the tone control to fine tune it better..

Here's a short MP3 clip http://thehumancomparator.net/music/living%20vocoder%203.mp3

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zthee



Joined: Feb 20, 2008
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PostPosted: Sun May 06, 2012 6:13 am    Post subject: Reply with quote  Mark this post and the followings unread

http://thehumancomparator.net/music/living%20vocoder%204.mp3

Turning the V/U threshold trimmer. Starts at 0, then to max.

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keithwin



Joined: Jul 20, 2007
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PostPosted: Mon May 07, 2012 4:00 am    Post subject: Reply with quote  Mark this post and the followings unread

Good work zthee and sound, just soldering my 1% caps in today, still got the trims and other box caps to order. Have used 25V electrolytics instead of 35V, this shouldn't make a difference, it's what I had in but the paranoia is creeping in Sad
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zthee



Joined: Feb 20, 2008
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PostPosted: Mon May 07, 2012 5:41 am    Post subject: Reply with quote  Mark this post and the followings unread

This project is only paranoia Smile

I checked all bands yesterday - turned out band 6, 8 and 17 were dead. Quick fix though, pin 8 of 4558 were bent (same op amp, same location, same pin, three different channels).

Here's another function test with all bands operational http://thehumancomparator.net/music/living%20vocoder%205.mp3

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jwilsey



Joined: Feb 24, 2009
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PostPosted: Mon May 28, 2012 12:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Sounds amazing! Thanks for posting.
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SolderSmoke



Joined: May 21, 2007
Posts: 15
Location: Sweden

PostPosted: Fri Jun 08, 2012 1:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Anyone did a suggestion for a frontpanel yet?
The patchpanels (Ghielmetti) seems hard to get. Anyone figured out a different solution, like analog matrix?
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Luka



Joined: Jun 29, 2007
Posts: 1003
Location: Melb.

PostPosted: Fri Sep 07, 2012 2:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

i just acquired a pcb for this project

i just wanted to tip my hat to sound and zthee for paving the way through the troubleshooting. thanks for helping out


does anyone have a panel completed / case yet?

is there anyone in australia who wants to join in on capacitor buying
there is a price break at 250 which halves the cost of the caps

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problemchild
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vtl5c3



Joined: Sep 08, 2006
Posts: 425
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PostPosted: Wed Oct 24, 2012 5:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Has anyone in the US ordered the 1% caps? I'm trying to order them from RS electronics' german site, but it looks like they only ship to germany. I went to the UK site and found the same caps for almost double the price, so that's out. And their US affiliate is Allied, who doesn't have those caps. Any recommendations?
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Luka



Joined: Jun 29, 2007
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PostPosted: Thu Oct 25, 2012 1:49 am    Post subject: Reply with quote  Mark this post and the followings unread

James from willzyx has a good deal on the caps
Im getting mine in the next few weeks

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problemchild
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Luka



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PostPosted: Sat Mar 02, 2013 3:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Does anyone have the manual for ems 3000 and/or 5000 vocoders in english?
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problemchild
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vtl5c3



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PostPosted: Sat Mar 02, 2013 8:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

I"m pretty sure this one is for the 5000:

https://sites.google.com/site/analogvocoderinfo/analog-vocoder/ems-manual
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Luka



Joined: Jun 29, 2007
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PostPosted: Sun Mar 03, 2013 12:50 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks

bad producer gave me that link earlier today as well

it is all starting to make more sense - time to start a panel design

has anyone thought about having led bar displays for the envelope detectors similar to the buchla 296e?

if so, would you need a bar graph driver for each channel or could you do it an easier way?

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The Bad Producer



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PostPosted: Sun Mar 10, 2013 5:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

I can't think of any other way of doing it - than bar graph drivers...
are you really thinking of doing that?
Shocked

If you did that would it probably be best to have that whole section powered from a different 'dirty' PSU...

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The Bad Producer



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PostPosted: Sun Mar 10, 2013 6:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

I should add that my vocoder has been half finished for nearly a year whilst I've been moving in and out of different houses. I have a nice new workshop now, so have pulled it onto the desk again for finishing, can't remember where I got to though!
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The Bad Producer



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PostPosted: Sun Mar 10, 2013 7:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

So, I'm trying to get my head around the panel design for this as I near the end of soldering and beginning of testing. I thought I'd make a design for each part of the schematic to help me envisage how best to arrange everything, what to include etc..

Has anyone finished and got a panel done?

Be good to hear any thoughts on sections as I put them up over the next days...

I begin with the Speech Input Amplifier:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

(posted this on muffs too)

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StephenGiles



Joined: Apr 17, 2006
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PostPosted: Tue Mar 12, 2013 8:59 am    Post subject: Reply with quote  Mark this post and the followings unread

The Bad Producer wrote:
I should add that my vocoder has been half finished for nearly a year whilst I've been moving in and out of different houses. I have a nice new workshop now, so have pulled it onto the desk again for finishing, can't remember where I got to though!


The trick is notes, notes and more notes - I have often told myself when I've been in the same boat!
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The Bad Producer



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PostPosted: Tue Mar 12, 2013 9:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes, you're right - I've found all my notes too, but still feel a bit disorganised!

Did you finish yours?

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Luka



Joined: Jun 29, 2007
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PostPosted: Wed Mar 13, 2013 1:47 am    Post subject: Reply with quote  Mark this post and the followings unread

The Bad Producer wrote:
So, I'm trying to get my head around the panel design for this as I near the end of soldering and beginning of testing. I thought I'd make a design for each part of the schematic to help me envisage how best to arrange everything, what to include etc..

Has anyone finished and got a panel done?

Be good to hear any thoughts on sections as I put them up over the next days...

I begin with the Speech Input Amplifier:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

(posted this on muffs too)


looks good

might be interesting to have a feedback input / aux input as well Smile
i have that on my fs1

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problemchild
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emdot_ambient



Joined: Nov 22, 2009
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Location: Frederick, MD

PostPosted: Wed Mar 13, 2013 6:56 am    Post subject: Reply with quote  Mark this post and the followings unread

The Bad Producer wrote:
I can't think of any other way of doing it - than bar graph drivers...
are you really thinking of doing that?
Shocked

If you did that would it probably be the best thing in the world!


Fixed that for you. Wink

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The Bad Producer



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PostPosted: Wed Mar 13, 2013 7:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Laughing

True!

I've done a bit more today on this, and I'll amend that panel Luka - do you mean like a switch and pot to allow the output to be mixed back into the input?

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Luka



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PostPosted: Fri Mar 15, 2013 3:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

trying to draw a signal flow diagram

got most of it done except -

where does the voiced and unvoiced outs goto?

edit - wait im blind - of course they go to the mode sections in the compander module

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problemchild
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Luka



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PostPosted: Fri Mar 15, 2013 7:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

here is what i can gather from the schematics

let me know if anything is wrong / missing

<<removed>>

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problemchild
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Last edited by Luka on Thu Mar 21, 2013 11:23 pm; edited 1 time in total
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The Bad Producer



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PostPosted: Sun Mar 17, 2013 5:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

Looks good to me, but I can't double check it at the mo from this computer, I have done something the same, but it's too shoddy to post! I'll look it up when back at home next week...
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Luka



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PostPosted: Mon Mar 18, 2013 12:28 am    Post subject: Reply with quote  Mark this post and the followings unread

removed the image above
the more i work on this the more errors i found Smile

one point of confusion at the moment is the pause bus

regarding the the filterbank pots / slider
is that marked as PB on the schematics?

and

does CW of the pot / slider join to both the PS bus AND channel analyzer output?

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problemchild
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Luka



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PostPosted: Fri Mar 22, 2013 12:18 am    Post subject: Reply with quote  Mark this post and the followings unread

bump for edit

and new question in previous post

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problemchild
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