MIDI controllable audio sampler - successor of specimen

 A simple but very useful midi controlled sampler for ALSA/JACK featuring:
  * 64 notes of polyphony, spread across up to 64 patches.
  * fast, high quality pitch scaling, linear ADSR volume envelopes.
  * low pass filter with resonance; a variety of direction-independent.
  * playback modes and zoomable sample editor for loop and play points.
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 Petri-Foo is a fork of the Specimen Sampler project.