I created a chugin that warps and transposes audio like Ableton Live does with clips. It actually parses Ableton ".asd" files in a kind of hilariously hacky way.Control parameters:

• .read - ( string , WRITE only ) - loads file for reading
• .playhead - ( float , READ/WRITE ) - set/get playhead position in quarter notes relative to 1.1.1
• .loop - ( int , READ/WRITE ) - toggle looping
• .play - ( int , READ/WRITE ) - toggle playing
• .bpm - ( float , READ/WRITE ) - set/get BPM rate ( Audio files without Ableton warp files are assumed to be 120 BPM )
• .transpose - ( float , READ/WRITE ) - set/get pitch transpose in semitones
• .startMarker ( float , READ/WRITE ) - set/get start marker of the clip
• .endMarker ( float , READ/WRITE ) - set/get end marker of the clip
• .loopStart ( float , READ/WRITE ) - set/get loop start marker of the clip
• .loopEnd ( float , READ/WRITE ) - set/get loop end marker of the clip
• .reset ( float , WRITE ) - reset the internal process buffer of the Rubberband stretcher