Hydrogen is an advanced drum machine for GNU/Linux. It's main goal is to bring professional yet simple and intuitive pattern-based drum programming.

Click to see the Hydrogen Manual

Click to see the Hydrogen Tutorials

General:

• Very user-friendly, modular, fast and intuitive graphical interface based on QT 3.
• 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:

• 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:

• JACK, ALSA, PortAudio and OSS 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.

Changes in v1.2

• Fixed midi and pc keyboard input
• Fixed panning for midi and pc keyboard input
• Updated CoreAudio driver to new API
• The clock is now initialized correctly
• Fixed alsa driver deadlock
• Removed deprecated libarchive api calls
• Fixed memory leaks