Hydrogen is an advanced drum machine with a main goal to bring professional yet simple and intuitive pattern-based drum programming.Hydrogen Features:General Very user-friendly, modular, fast and intuitive graphical interface based on QT 4. 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 192 ticks per pattern with individual level per event and variable pattern length. Unlimited instrument tracks with volume, mute, solo, pan capabilities. Multi layer support for instruments (up to 16 samples for each instrument). Sample Editor, with basic cut and loop functions. (NEW) Time-stretch and pitch functions via rubberband cli. Require the rubberband-cli package. (NEW) Play-lists with scripting function. (NEW) Advanced tab-tempo. (NEW) Director Window with a visual metronome and song position tags. (NEW) Time-line with variable tempo. (NEW) Single and stacked pattern mode. (NEW) Export/Import single patterns into song projects. (NEW) Midi learning via Shift+MouseClick on many gui-cotrollers combined with a midi settings editor. (NEW) 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, aiff, flac or ogg file. Export song to midi file.