Hydrogen

Overview

Hydrogen is a desktop drum sequencer and drum synthesizer for musicians building beats from patterns and samples. It suits people who want a free, configurable drum machine that can operate on its own or join a MIDI-based setup. Its main trade-off is that it is a standalone application rather than an LV2 plugin.

Key features

Hydrogen’s pattern sequencer supports unlimited patterns and lets users chain them into songs. That makes it more useful for developing full arrangements than a tool confined to short loops, though users still need to program the patterns themselves. It can also function with an external MIDI keyboard or sequencer.

The sample-based stereo engine imports WAV, AU, AIFF, and FLAC files, and downloadable drumkits can be installed through the sound library manager. This suits users who want to shape a kit around their own samples. The pattern editor offers per-note velocity and pan controls; human velocity, timing, pitch, and swing functions add ways to vary programmed parts without changing the underlying pattern.

Time-stretching and pitch shifting provide additional sound shaping. MIDI support and OSC API automation help Hydrogen fit into a controlled performance or production workflow. For audio connections, it supports JACK, ALSA, PortAudio, and OSS drivers; the manual describes connecting it to other audio software through JACK.

Exports include WAV, AIFF, FLAC, OGG, MIDI, and LilyPond. That range covers rendered audio as well as MIDI and notation-oriented output, giving users options for carrying songs into other workflows. Hydrogen is distributed under GPLv2+.

Pricing

Hydrogen is free, with no paid plan or free-trial period. There are no plan tiers to weigh against its sequencing, sample import, or export features. It is a strong fit for anyone who wants a capable drum machine without a purchase; users who need an LV2 plugin should look elsewhere, since Hydrogen has no current plans for one.

Platforms

Hydrogen is a desktop application with downloads for Linux, Windows, and macOS, as well as source code. Windows downloads support 64-bit Windows Vista and later; the macOS release supports OS X 10.14 and later. Linux users can find it through distribution repositories or the project’s Linux download. The project also provides a manual, FAQ, wiki, GitHub repository, and mailing list for help and information.

Who it's for

Hydrogen suits musicians who want pattern-based drum programming for home practice, studio work, or live performance, especially those who value sample import, note-level editing, and control through MIDI or OSC. Its audio drivers and JACK connections make it relevant to users integrating a dedicated drum machine with other audio software. It is less suitable for someone who specifically needs Hydrogen to load as an LV2 plugin.

Pros and cons

• Pros: Unlimited patterns can be chained into songs, supporting arrangements beyond isolated beats.
• Pros: WAV, AU, AIFF, and FLAC import, plus downloadable drumkits, offer flexibility in building sounds.
• Pros: MIDI and OSC control, multiple audio drivers, and six export formats give it several ways to fit into a larger workflow.
• Cons: No LV2 plugin version is currently planned, ruling it out for users who require that format.
• Cons: It is desktop software; the supported downloads target Linux, Windows, and macOS rather than mobile platforms.

Alternatives

For a browser-based or mobile groovebox, mpump is free and runs on Android, iOS, and the web, with drums, bass, synths, effects, and shareable beat links. Choose Atlas 2 instead if you want paid desktop software for Linux, macOS, or Windows: its full version costs $99, paid once, includes installation on three machines, and has a free trial.

0x808 is another free option for Windows, macOS, and Linux. DMC60 is a paid alternative for Windows and macOS. On Apple devices, Patterning 3 costs $29.99, paid once and supports iPadOS 14.7 or later and macOS 11.5 or later on Apple Silicon.

DrumComputer is a paid option for iOS, macOS, and Windows, with a free trial and a $129, paid once full version. Playbeat 4 is another paid option for iOS, macOS, and Windows; its full version costs €89, paid once, while the €29, paid once upgrade is for previous-version owners. TRIAZ is a paid alternative for Windows and macOS. Browse more options in Drum Machine Software.

Verdict

Choose Hydrogen if you want a free desktop drum machine with flexible pattern arrangement, sample import, MIDI and OSC control, and broad export options. Its strongest case is the combination of sequencing depth and open-ended sound customization at no cost. Look elsewhere if an LV2 plugin is essential, or if you need a mobile-first tool.