pitch-based trigger

Hi all, looking for some creative solutions again!

I have a sequence running from Slips that is mostly from 150-400 Hz but has one note at 500 Hz that I would like to trigger a gate to open feedback on another module. Being Slips, the note doesn’t play all of the time so it’s important that the gate is triggered only when the note is played. In my mind, ideally a module would listen to the output of the oscillator and when the 500 Hz frequency exceeds a threshold a trigger would be…triggered.

I’ll keep looking for a solution but I’d also like to pick your brilliant minds!

A comparator and some logic will accomplish what you require.

I’m thinking it would be simpler, perhaps more reliable, to monitor the V/Oct signal feeding into the VCO rather than the VCO output. Use a windowed comparator to produce a gate when the V/Oct is within your desired range. The Venom WinComp is one module that can do this.

2 Likes

correct, 500Hz sits between B4 and C5, here is the voltage equivalents of those notes:

B4        0.917V         493.88 Hz
C5            1v         523.25 Hz

Excellent that did the trick! A lot more elegant than the Frankenstein solution I was trying to develop.

3 Likes

And not to forget, Note Detector from Voxglitch does exactly this. A gate or trigger from a specific note input (v/oct). Of course you would have to adjust tolerance for a note off the 12tet grid. Maybe windowed comparator is best.

A quantizer, in other words :wink:

1 Like

That is why I recommended Venom WinComp. The Bogaudio CMP can also do this. There are probably others.

1 Like

you can use a bandpass filter tuned on 500Hz and after you put a slope detector

1 Like