hydrogen 1.0.0~rc1-0ubuntu0.20.04.1 (amd64 binary) in ubuntu focal

 Hydrogen is an advanced drum machine. It's main goal is to bring
 professional yet simple and intuitive pattern-based drum programming.
 .
 General features:
  * Very user-friendly, modular, fast and intuitive graphical interface
    based on QT 5.
  * Sample-based stereo audio engine, with import of sound samples in
    .wav, .au and .aiff formats.
  * Support of samples in compressed FLAC file.
 .
 Sequencer and mixer features:
  * Pattern-based sequencer, with unlimited number of patterns and
    ability to chain patterns into a song.
  * Up to 64 ticks per pattern with individual level per event and
    variable pattern length.
  * 32 instrument tracks with volume, mute, solo, pan capabilities.
  * Multi layer support for instruments (up to 16 samples for each
    instrument).
  * Ability to import/export song files.
  * Unique human velocity, human time, pitch and swing functions.
  * Multiple patterns playing at once.
 .
 Other features:
  * JACK, ALSA, PortAudio, OSS and PulseAudio audio drivers.
  * ALSA MIDI and PortMidi input with assignable midi-in channel (1..16,
    ALL).
  * Import/export of drumkits.
  * Export song to wav file.
  * Export song to midi file.