Audio looping & manipulation in RAM

Music Technology

Sebastian built an experimental record/looper circuit, resulting in some interesting sample contortionism –

This circuit currently has a few ways to manipulate audio. These are:

  • A record button allows the user to sample incoming audio to a RAM buffer
  • A potentiometer sets the input level
  • A potentiometer sets the sample rate / pitch for playback. The changing of sample rate can be recorded if desired, by physically changing the position of the pot during recording.
  • The address lines A0 – A18 can be manipulated ie. moved around, removed, replaced, giving a wide range of effects such as stuttering, repeating and basic granulation.

    Although this does not sound like heaps of manipulation, keep in mind that this circuit can absolutely mangle a sound beyond recognition. The ADC is running at its maximum speed, and as such the sample rate can be varied greatly for example.

  • Read on for further explanation of this RAM Music.

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