when you quantize a midi clip in ableton live (let´s say 1/8), it will automatically place out of tempo played notes to the nearest specified beat on the grid. ok

why don´t do that with an audio live recording on the fly? it can´t be so difficult… (well, I would not be able to do it by my self).

so this device should detect the highest peak in each beat to place them “on time” in the specified grid to the nearest quantized tempo beat. I suppose that adding a little of time stretching live capability…

any ideas? has this been done?

thanks a lot.

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http://www.en.davidfernandez.org
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it has been done before in supercollider via the bbcut library by nick collins:

http://www.informatics.sussex.ac.uk/users/nc81/bbcut2.html

check out his other stuff, too:

http://www.informatics.sussex.ac.uk/users/nc81/code.html

http://www.informatics.sussex.ac.uk/users/nc81/

he refers to it as “Real Time Onset Detection”.

if you’re eager to use something like this in Max, there is a VST developed around parts of the BBCut library called LiveCut:
http://mdsp.smartelectronix.com/livecut/
But LiveCut i think simply cuts according to your DAW’s tempo sync and certain procedures(see description). I don’t think it does the full onset-detection, but it will sound like it if you play rhythmic to the tempo at which it is synced(your DAW or Max’s transport tempo).

If you want more than BBCut(in SuperCollider) or the LiveCut VST, it’s probably something you’d want to code an external for, perhaps even translate the BBCut source code(classes) into Max external(s).

I’m not saying that something much simpler couldn’t be achieved in Max alone, just that Nick there really hit the mark with some extensive research and work.

Hope it helps.

if you record an audio with a strong and marked rhythm, and a couple of beats are out of tempo, you can easy move the warp markers to make it sound synced.

so what about a maxforlive device detecting the maximum amplitude parts of a live recording and taking them to the nearest quantized beat automatically.

it sounds simple… I´m sure it has to be done before.

anyway thanks a lot raja for your so well documented reply,

I´ve tryed livecut, but it is not what I was looking for.

I´m not into supercollider, waw! it took me lots of months get into max/msp… I´m not skilled with programming, so it scares me to start with another enviroment…

thanks again for your reply!

but can you control the warp markers within a max4live device?

I think that’s the main problem in implementing what you have in mind.

i don´t think this is difficult to accomplish (well, for me it is). it´s just a matter of time.

but the time has come!!

:)