MMJ4M 14: Audio Buffers

Chapter 14 of VJ Manzo‘s book Max/MSP/Jitter for Music has one purpose: show how to use audio buffers for recording and playing back audio files. These buffers will be a critical component in my planned live looping exercises, so I’m excited about this chapter. I learned how to do the following:

  • Create and name buffer~ objects
  • Open windows to see the sound waves for the buffer~ objects
  • Get information such as track length with the info~ object and use that manually resize the buffer (if desired, although Max 6 seems to adjust the buffer on its own)
  • Use the groove~ object to read audio from the named buffer
  • Set the buffer to loop
  • Set a flonum variable to control playback speed by converting it with a sig~ object
  • Record new audio into the buffer with the ezdac~ and record~ objects
  • Set up a MIDI keyboard to change simultaneously the speed and pitch of the buffer playback, with middle C set for default speed (although it would be better to alter speed and pitch separately)


  • Max/MSP/Jitter for Music, Ch. 14: Audio Buffers (9 exercises)
  • Patches can be downloaded from (Dead Link)
  • UPDATED LINK: Patches can now be downloaded from
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