This blog is a notepad for Physical guitar synth

Sunday, January 10, 2010

Signal electronics are working!

I have tested all the parts together and they are working.
I only have one coil untill i settle on the exact configuration i need, but i have tested it on each string and amplifier channel.

I have tried a few different coils including hand wound electromagnets, relays, speaker coils, buzzer and bell coils. so far the bell coil works the best, it is 3 ohms and does not get too hot as long as you do not send it a full level signal for too long (that would never happen) and it imparts the attack of the sound in to the string which is the most important thing.

Unfortunately i dont think you can get these old electromechanical bells anymore.

also the pickup works and i can get the signal in to scope through the fostex VC-8


This is really good progress, and i actually got to hear some sounds :D (i just sent synth pulses from "miniscope" to the string, but it sounded cool. will record some soon.), it is looking good!

Next up will be to create a scope drvice which runs on the Pulsar DSP card. this will do all the hard work generating envelopes and processing the signal to be fed back to the strings

The  MIDI part will be done after that. For now i will just use a MIDI keyboard to emulate the guitar keys.

1 comments:

  1. Beautiful Frankenstein testbed!

    I have a gk2a-based sustainer (without DSP and with a monophonic driver coil) and am delighted to see your VERY different approach to this.

    I think your power amps are overkill for this application, but you've (undeniably) built in lots of headroom and have minimal risk of blowing one up.


    I'll stay tuned for the next installment!

    Elmo'.

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