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



Joined: Mar 24, 2010
Posts: 6
Location: Dresden

PostPosted: Mon Nov 16, 2015 4:45 am    Post subject: Reply with quote  Mark this post and the followings unread

as i wrote i was also surprise, anyway to be more precise the leds have more realistic response between
100ohm and 100kohm depending on the audio source, it work for me with 100ohm.

I use a compressor in order to have always quite the same peaks on both input. I have the following settings:

For the MIC IN: threshold -20db | attack 40ms | release 1s | ratio 6:1
INSTRUMENT IN: threshold -5db | attack 5ms | release 1s | ratio 4:1

For the gain adjustment i recommend to use a multi-meter and be sure that
no more then 0.7volt are going in to the Vocoder, like this there are distortions or other artifacts
and also the 2 source are mixed in balance.

Settings vary always depending on the gear and setup used but there are some good starting compression
setting and from them is more easy to reach the adjustment that meets your need.

for simple audio signals

SOLO VOICE: threshold -20db | attack 30ms | release 350ms | ratio 2.5:1
ACOUSTIC GUITAR: threshold -10db | attack 5ms | release 240ms | ratio 2.5:1
E GUITAR: threshold -8db | attack 5ms | release 260ms | ratio 3.5:1
FINGER BASS: threshold -12db | attack 15ms | release 470ms | ratio 2:1
SLAP BASS: threshold -12db | attack 6ms | release 140ms | ratio 1.7:1
BRASS: threshold -18db | attack 15ms | release 220ms | ratio 1.7:1
STRINGS: threshold -15db | attack 70ms | release 1s | ratio 2:1
SYNTH BASS: threshold -10db | attack 8ms | release 250ms | ratio 3.5:1

for complex audio signals

FULL COMP: threshold -10db | attack 70ms | release 1.5s | ratio 3:1
NEAR LIMIT: threshold -18db | attack 10ms | release 200ms | ratio 6:1
HARD LIMIT: threshold -5db | attack 1ms | release 300ms | ratio 10:1

hope this can help Very Happy
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electrospeaker



Joined: Jun 30, 2006
Posts: 49
Location: Norway

PostPosted: Sun Dec 20, 2015 1:43 am    Post subject: Reply with quote  Mark this post and the followings unread

hesed wrote:
I use a compressor in order to have always quite the same peaks on both input. I have the following settings:

For the MIC IN: threshold -20db | attack 40ms | release 1s | ratio 6:1
INSTRUMENT IN: threshold -5db | attack 5ms | release 1s | ratio 4:1


I'm currently working on the ETI vocoder (mentioned earlier in this thread) and plan to add a compressor (or rather a limiter) to the input circuitry. It sounds like you have an external compressor connected to your vocoder, but would there be any disadvantages to including it with the input amps, permanently turned on?
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zephyrin



Joined: Feb 15, 2012
Posts: 9
Location: Switzerland

PostPosted: Sat Apr 16, 2016 6:26 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello

i don't know if someone know it but there are a 20 bands vocoder designs by JH here

http://jhaible.com/legacy/vocoder/living_vocoder.html

Ralf from random source have sell some PCB for 100$
Perhaps it can make an other batch!

If there are someone interesting by this you can send a message to ralf on this site

http://randomsource.net/haible/vintage
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shenda



Joined: Jan 01, 2014
Posts: 9
Location: Rovinj, Croatia

PostPosted: Sun Feb 07, 2021 6:47 am    Post subject: Reply with quote  Mark this post and the followings unread

Just to wake up this sleepy topic.
I removed everything unnecessary from the pcb ... Laughing Laughing Laughing
... to the other side.


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elmegil



Joined: Mar 20, 2012
Posts: 2141
Location: Chicago
Audio files: 16

PostPosted: Sat Feb 27, 2021 11:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's a different one. http://www.vocoder.eu/

This is a respin of the Elektor Vocoder....

The PCBs are well made, an enclosure is included (if you wish), and it's a straightforward build... until you get to the calibration.

The calibration instructions were reworked a couple months ago, but I haven't taken time to dig it back out and finish it up.

It looks smashing though. Smile
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shenda



Joined: Jan 01, 2014
Posts: 9
Location: Rovinj, Croatia

PostPosted: Fri Mar 12, 2021 3:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

the rest of the story... Cool


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electrospeaker



Joined: Jun 30, 2006
Posts: 49
Location: Norway

PostPosted: Mon Mar 15, 2021 3:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow! That's very impressive to make it so compact.
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