I'm totally new to PD and am trying to get Charles Martin's Audio to MIDI patch working. I want to use it with my violin, so I can play synths with my violin in Ableton live.

So far I've got MIDI info coming in to Ableton, but it's not notes - it's just a couple of CC values (14 and 15) which don't seem to relate to the pitch.

Are there any existing posts about this, or does anyone have knowledge of using this?

I don't know about Charle's martin's audio midi, but have you taken a look at [fiddle~]? It should do what you need.

Hey Pitch Twit,

Charles here. The idea of that patch was to send MIDI control data, and not pitch and amplitude data. It isn't very difficult to change the patch to output pitch information since the fiddle~ object already returns pitch as a midi note value.

I think that the best thing for you to do is to follow some of the Pd tutorials (these are in the doc directory inside the application folder) and learn about which objects can output midi notes.

I'm not sure how hard it would be to create a patch that can output meaningful MIDI notes from violin. The answer could be ``extremely hard" if you're looking for an accurate MIDI transcription of a violin performance. But if you only want to have MIDI information that corresponds (in a simplified way) to what you are playing on violin, it could be quite simple like my theremin patch.

You could use the noteout object, but I tried that and am getting a lot of jitter between notes. Works better with a vsti or aui synth that has a slow attack.

I connected the amplitude to a number and sent that to the velocity inlet on noteout. Then I connected the pitch to the left inlet on noteout

The real problem with using noteout is that notes will ring forever! you need to send notes with velocity zero (I think) to stop them.

This is why this is hard, even on a monophonic instrument. After some small delay we know the pitch and amplitude to some degree of accuracy. We also know about attacks (either from fiddle~ or bonk~), but it's hard to manage the data in such a way that when an attack occurs, significant pitch and amplitude information is send to noteout.

But what about a nonattack? how do we know when to turn notes off? You could say that if amplitude dies away the note ends, but what if you're playing legato on violin and there are several notes that occur before the amplitude dies away.

All these problems are possible to overcome, but it takes time and work.

--Charles