from thread on Abelton MaxForLive forum, responding to the idea that you could use current M4L API to do this:
Post subject: Re: Max/MSP user considering M4L... sending clips to buffers?
pukunui Posted: Thu Dec 17, 2009 6:45 pm
The clip name of a clip in Live is not bound to the file name. So you could not be sure that this would work all the time.
We have this logged as a feature request for a future version of the API - a way to get the absolute path of the file a clip references.
Andrew is a C74 developer, so I tend to believe him.
Lots you can do w/ Max4Live, just not that right now. or MidI polyaftertouch or SysEx.
here is the core of the workaround, from Crampe's linked file:
Note that in order for the clip to be loaded into Ms Pinky, the audio file corresponding to that clip must be located somewhere within the Max/MSP file search path.
if the clip is in the running max4live application's searchpath, it will be found with just a unique filename, such as the clip is named with, we got that, out side of the app's searchpath , it would require the absolute path, which we don't have.