Shuriken is an open source beat slicer for Linux which harnesses the power of aubio's onset detection algorithms and Rubber Band's time stretching capabilities. A simple Qt interface makes it easy to slice up drum loops, assign individual drum hits to MIDI keys, and change the tempo of loops in real-time. The JUCE library takes care of handling audio and MIDI behind the scenes.

• onset and beat-of-the-bar detection (via aubio)
• calculate BPM
• sync BPM of a drum loop to JACK transport
• zero-crossing detection
• slice and un-slice waveform
• each audio slice automatically assigned to its own MIDI key
• move, delete, and copy & paste audio slices
• apply gain, gain ramp, normalise, and reverse
• amplitude envelope generator with controls for attack, release, and one-shot
• set the number of JACK outputs and route any audio slice to any output
• time stretching in offline or real-time mode (via rubberband)
• time stretch individual audio slices and quantise your beats
• NSM and LADISH L1 session management support
• ALSA and JACK MIDI
• import a wide range of audio file formats (via libsndfile and the built-in sndlib library)
• export audio slices in WAV, AIFF, AU, FLAC, or Ogg format, with options for encoding and sample rate
• export Hydrogen Drumkit, SFZ, Akai .pgm (MPC 500/1000/2500), or MIDI file