Helm 2.3.9 for Mac

Mac Utilities

Updated Aug 16, 2026

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Helm is a free software synthesizer by Matt Tytel that runs on Mac as a standalone instrument and as a plugin inside your music software. It is a polyphonic synth with a clear layout that invites experimentation, and it is open source, so the sounds you make are entirely your own with no licence checks standing between you and a session. It suits beginners learning synthesis and producers who want a characterful free voice. Updated Aug 16, 2026.

Key Features

• Two oscillators with a choice of waveforms and cross modulation
• Flexible modulation routing with visual feedback on controls
• Built in arpeggiator and step sequencer for moving patterns
• Filters, envelopes and effects including distortion and delay
• Runs standalone and as a plugin in major Mac music hosts

How to Download

1. Use the download button on this page to get the Mac package.
2. Run the installer so the standalone app and plugins are placed correctly.
3. Open Helm on its own or load it as an instrument in your DAW.

System Requirements

Helm needs a Mac able to run your music software of choice, plus a host app if you plan to use the plugin version. A MIDI keyboard is optional but makes playing and testing patches far more enjoyable.

FAQs

Is Helm really free?

Yes. Helm is free and open source software released on a pay what you want basis by its developer, so you can use it without paying and support it if you wish.

Which plugin formats does Helm support on Mac?

The developer lists plugin and standalone versions for Mac, including Audio Unit and VST formats used by hosts such as Logic Pro and Ableton Live. Check your host for its preferred format.

Do I own the sounds I create with Helm?

Yes. The developer states that any sound you create with Helm belongs to you, which makes it safe to use in your own released music.