Audio to MIDI

Dec 8, 2006 at 7:44pm

Audio to MIDI

I have been developing(with limited success)a patch to send MIDI controller data and note ON/OFF/velocity based on the dynamics of 2 or 3 frequency ranges(Kick,Snare,Hi-Hat). The problem I’m having is in the process of filtering the incoming audio. I consider myself to be quite an audio geek but when it comes to the internal workings of filters and the math behind them, I’m pretty clueless. I can’t seem to build a good adjustable band-pass filter, just a bunch of resonant noise. So I am wondering if anyone has had success with accurate filtering or if anyone has tried to make a similar patch. I even be willing to compensate anyone that has a working example of this. I’ve been working on this for a while and it seems I’ve hit a wall with it. Unfortunately I really need to make this work soon. Any information is sincerely appreciated.
(If anyone is interested in my flawed approach, I’ve attached the text version of my filter)

#29111
Dec 8, 2006 at 10:08pm

You’d probably have to explore fft~, pfft~, etc. These could be configured to analyze the freq ranges and intensities, then (somehow) you’d have to select from the three outcomes. It sounds a bit tricky but is doable (I imagine).

I’d like to do something similar with vocals triggering MIDI data based upon the sounds created (like a beatbox). Not that easy, I think, but doable if the ranges are different enough.

-CJ

#90177
Dec 8, 2006 at 10:46pm

there are some externals out there that can help you. specifically the fiddle~ object. that converts audio input to midi data and then you could set a range of notes to trigger your kick, snare, and hihats.
This would be a way of doing it without elaborate filters or diving into fft objects.

http://crca.ucsd.edu/~tapel/software.html
for fiddle~ and other freq analysis externals.

good luck.

#90178
Dec 8, 2006 at 11:41pm

Awesome! I’m having a look at fiddle~ right now. Looks pretty good so far. I’ll let you know how it goes.

#90179

You must be logged in to reply to this topic.