Spent the weekend breadboarding a substantial part of the vocoder's analogue circuitry.
ETI Vocoder constructional project reproduced with permission from Wimborne Publishing Ltd. http://www.epemag.com

By Julian

Youtuber, shed dweller, solar charge controller aficionado

15 thoughts on “Vocoder update – filters and vcas on breadboard”
  1. Avataaar/Circle Created with python_avatars jlucasound says:

    I didn't want to mess up the "555" on your "thumbs up"!! 😉 Here is your thumbs up. 👍 👍 🙂

  2. Avataaar/Circle Created with python_avatars Arlen Moulton says:

    are you ever going to get this finished? really want to see what it can do!! love this rackmount audio stuff

  3. Avataaar/Circle Created with python_avatars Do RC says:

    What is this going to do?

  4. Avataaar/Circle Created with python_avatars Will Proctor says:

    Could you balance the resistors on the pots to allow a bigger range of adjustment on the pots themselves? Or is this against the point of the vocoder?

  5. Avataaar/Circle Created with python_avatars mike95826 says:

    A suggestion for the future would be to do the same project using switched capacitor filters such as the LTC1060 or LTC1160 series parts. Years ago I did a project with the predecessor part, the MF10. The part is easy to use and quite versatile.

  6. Avataaar/Circle Created with python_avatars Elnufo says:

    This is soo nerdy stuff, i love it! 😀

  7. Avataaar/Circle Created with python_avatars Scott McGill says:

    Krispy Kreme. Lol.

  8. Avataaar/Circle Created with python_avatars Marek Coufal says:

    hi jullian, can you please record or something output sound? because apparently, mic on your mobile phone or those repros are not wery good.

  9. Avataaar/Circle Created with python_avatars Leepshin says:

    erm, you've got a long way to go before you offer it to Daft arsed Punks to make a hit record with. lol

  10. Avataaar/Circle Created with python_avatars NivagSwerdna says:

    PLEASE! Get modern…. Download DipTrace… schematic… PCB…. Send to Elecrow. In the time you could have put a few wires on a breadboard you would have something far prettier and it would be educational at the same time. (And actually relevant!)

  11. Avataaar/Circle Created with python_avatars irgski says:

    time for a pcb?
    btw – where do the Krispy Kreme's go in the circuit?

  12. Avataaar/Circle Created with python_avatars Rays RCs and Tech says:

    Great video… going to try this myself. Just a odd question how do you find the quality of that breadboard? I like the look of it and may pickup one

  13. Avataaar/Circle Created with python_avatars RWBHere says:

    Hello, Julian. Is there a fairly simple way of individually notch-filtering all 88 notes of a piano, so that each output can be used to write directly to a MIDI file? I'd like to do it in hardware, or else with some routine on Arduino/ Raspberry Pi, etc. I want to pass an audio signal through a fine-tuneable 'comb filter', then save and edit the resulting MIDI output. If you know of a method, could you please consider making a project video or videos about how it's done? Thanks. P.S. You'll be best off by dumping that breadboard approach, and using a shielded/ground-planed PCB layout, with screened cables between stages. Those microphonics are worrisome hints about future problems.

  14. Avataaar/Circle Created with python_avatars T Komoski says:

    Super Cool Julian, nice to see the project moving forward.

  15. Avataaar/Circle Created with python_avatars Defpom's Electronics Repair says:

    Maybe you should consider a digital pot arrangement, to allow you to parallel the pots electronically to adjust digitally instead?

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