Mbira
Well-known member
Hi guys,
It's been a while!
And while it has been a long time since I have posted here, my electronics abilities have not improved at all! In fact they have probably gotten worse. In any case, I have been totally bitten by the modular synth bug, and I'm having a blast!
I have the marimbas that I build for the band, and in each key there is a piezo trigger that I have been sending through an audio to MIDI converter. Now, I want to totally ditch the midi and computer. I want to go out of a DB-25 from the marimba. The DB-25 has 19 individual piezo triggers.
I want to then plug that DB-25 into a module that will take each individual signal and let me assign a specific voltage for when that trigger is struck.
I understand that probably the easiest way to do this would be with some sort of logic and programming, but I really want to create this circuit with purely analog circuitry-if only to help myself learning.
I was looking at a 555 timing circuit: http://www.electroschematics.com/10166/piezo-trigger-switch/
From what I can tell, this circuit will take a trigger from a strike on the piezo and then hold a gate signal high for a time that is determined by the r/c network. That seems easy enough and that I could dial in that network to reduce false triggering or debouncing.
So I'm thinking having that circuit with a trim pot to adjust that r/c network. That will take care of the trigger.
Then I need that to feed into a circuit that will detect the trigger and when it is high, it will output a specific voltage. These modular synths work from 0-10V and there is a 1 v per octave range. I work in non-western tunings, so I would like to have a trim resistor that will let me fine tune each specific pitch to the exact frequency that I want...I don't know how this circuit would look, but I'm thinking this is just a basic transistor sort of circuit?
Then the third part of this circuit would listen to all of the incoming voltages and output only the most recent voltage. This is a part of the circuit that I don't know what I'm looking for at all.
Can anyone point me in the right direction-or at least tell me if I'm moving in the right direction? Thanks so much!
It's been a while!
And while it has been a long time since I have posted here, my electronics abilities have not improved at all! In fact they have probably gotten worse. In any case, I have been totally bitten by the modular synth bug, and I'm having a blast!I have the marimbas that I build for the band, and in each key there is a piezo trigger that I have been sending through an audio to MIDI converter. Now, I want to totally ditch the midi and computer. I want to go out of a DB-25 from the marimba. The DB-25 has 19 individual piezo triggers.
I want to then plug that DB-25 into a module that will take each individual signal and let me assign a specific voltage for when that trigger is struck.
I understand that probably the easiest way to do this would be with some sort of logic and programming, but I really want to create this circuit with purely analog circuitry-if only to help myself learning.
I was looking at a 555 timing circuit: http://www.electroschematics.com/10166/piezo-trigger-switch/
From what I can tell, this circuit will take a trigger from a strike on the piezo and then hold a gate signal high for a time that is determined by the r/c network. That seems easy enough and that I could dial in that network to reduce false triggering or debouncing.
So I'm thinking having that circuit with a trim pot to adjust that r/c network. That will take care of the trigger.
Then I need that to feed into a circuit that will detect the trigger and when it is high, it will output a specific voltage. These modular synths work from 0-10V and there is a 1 v per octave range. I work in non-western tunings, so I would like to have a trim resistor that will let me fine tune each specific pitch to the exact frequency that I want...I don't know how this circuit would look, but I'm thinking this is just a basic transistor sort of circuit?
Then the third part of this circuit would listen to all of the incoming voltages and output only the most recent voltage. This is a part of the circuit that I don't know what I'm looking for at all.
Can anyone point me in the right direction-or at least tell me if I'm moving in the right direction? Thanks so much!
