DefleMask Free plan 9.3 Visit Helm
tytel.org
What it is
Helm is a free software synthesizer for creating electronic music on a computer. It is available as a standalone application or as a plugin in LV2, VST, VST3, or AU formats, with GNU/Linux, Mac OSX, and Windows versions in 32-bit and 64-bit editions. Its sound tools include dual oscillators with cross modulation, unison, a sub oscillator, filters, modulation, a step sequencer, an arpeggiator, and audio effects. MIDI Learn lets users assign a MIDI control to a knob or slider. The maker describes Helm as software that can be run without DRM, studied, changed, and redistributed in original or modified form. The FAQ says the person who plays a sound made with Helm holds its copyright. Listed requirements include Windows 7 or later, MacOS 10.7 or later, Ubuntu Trusty 14.04 or later, and Debian Jessie or later. The project is described as being in beta with outstanding bugs. For bug reports, the maker asks users to include details such as what happened, crash reports, their operating system, and whether they use the plugin or standalone version.
Spec sheet
- What it does
- Helm is a computer software synthesizer for creating electronic music.Read 15 Oct 2026 · tytel.org
- Support
- The maker asks users to email bug reports with operating system, standalone or plugin details and crash information.Read 15 Oct 2026 · tytel.org
- Build requirements
- The source build instructions require platform build tools; AAX builds need the AAX SDK and macOS AU builds need Apple's CoreAudio SDK.Read 15 Oct 2026 · github.com
- Created sounds
- The FAQ says sounds created with Helm belong to the person who played them, who holds their copyright.Read 4 Oct 2026 · tytel.org
- Documentation depth
- The official manual is a 32-page v0.9.0 PDF covering synthesis modules, modulation, patch browsing, audio settings and performance controls.Read 15 Oct 2026 · tytel.org
- Effects
- Built-in effects are formant filtering, stutter, distortion, delay and reverb.Read 15 Oct 2026 · github.com
- Filters
- Helm provides blendable 12 dB and 24 dB low-, band- and high-pass filters plus low-, band- and high-shelf filters.Read 15 Oct 2026 · tytel.org
- Known limitations
- The GitHub project description says the release is in beta and has outstanding bugs.Read 4 Oct 2026 · github.com
- Licence
- The source repository identifies Helm as GPL-3.0 licensed open-source software.Read 15 Oct 2026 · github.com
- License and DRM
- The maker describes Helm as free software that can be run without DRM, studied, changed and redistributed in original or modified form.Read 4 Oct 2026 · tytel.org
- Limit: high-resolution Windows GUI
- A KVR reviewer reports that Helm's interface becomes unusable on Windows 11 with UHD monitors, although hosted-plugin use still worked.Read 15 Oct 2026 · kvraudio.com
- Limit: learning curve and interface
- Equipboard reviews mention a steep learning curve, while another reviewer calls the interface visually cluttered or unattractive.Read 15 Oct 2026 · equipboard.com
- Limit: maintenance
- GitHub shows the official repository was archived and made read-only on February 8, 2025.Read 15 Oct 2026 · github.com
- Limit: premium feature gap
- Data Broth says newer free instruments such as Vital and Surge offer substantially more capability, while AudioTechnology's summary says Helm lacks some premium-level polish.Read 15 Oct 2026 · databroth.com
- Limit: sound character
- Data Broth describes Helm as mainly digital and harsh, with limited usefulness for analog-style sounds.Read 15 Oct 2026 · databroth.com
- Limit: stability
- The project README warns that the release is beta and has outstanding bugs.Read 15 Oct 2026 · github.com
- Limit: Unity availability
- Unity marks the Audio Helm asset deprecated, unavailable for purchase and unsupported by its publisher.Read 15 Oct 2026 · assetstore.unity.com
- Maker identity
- The official Helm manual identifies Matt Tytel as the developer.Read 15 Oct 2026 · tytel.org
- Maker location
- Matt Tytel describes himself as a software synthesizer developer in the Boston area.Read 15 Oct 2026 · tytel.org
- MIDI control
- The manual explains how to map a MIDI control to a knob or slider using MIDI Learn.Read 4 Oct 2026 · tytel.org
- MIDI learn
- The manual describes right-click MIDI Learn for assigning a hardware MIDI control to a knob or slider.Read 15 Oct 2026 · tytel.org
- Modulation
- Modulation sources include two monophonic LFOs, one polyphonic LFO, three envelopes, keyboard controls, random values and polyphonic aftertouch.Read 15 Oct 2026 · github.com
- Notable news
- Matt Tytel announced the rebranding from Twytch to Helm on May 8, 2015.Read 15 Oct 2026 · tytel.org
- Oscillators
- The synthesizer has two oscillators with cross modulation and up to 15 unison oscillators per oscillator.Read 15 Oct 2026 · github.com
- Plugin formats
- The official site distributes Helm as standalone software and LV2, VST, VST3 and AU plugins.Read 15 Oct 2026 · tytel.org
- Polyphony
- Helm supports 32 simultaneous voices.Read 15 Oct 2026 · github.com
- Praise: sound range
- Equipboard reviewers say Helm can produce a wide range of sounds, including 808-style patches, and compare its value with Serum.Read 15 Oct 2026 · equipboard.com
- Praise: value
- Equipboard reviewers repeatedly praise Helm as a free alternative to expensive synth plugins and suitable for producers with limited budgets.Read 15 Oct 2026 · equipboard.com
- Praise: workflow
- KVR reviewers praise the clear interface, easy programming, useful presets, low CPU use on older hardware and creative modulation possibilities.Read 15 Oct 2026 · kvraudio.com
- Preset handling
- Helm can save and export individual .helm patches and import or export .helmbank collections.Read 15 Oct 2026 · tytel.org
- Rating on Equipboard
- 3.5 out of 5 from 5 reviews (11 ratings).Read 15 Oct 2026 · equipboard.com
- Rating on KVR Audio
- 4.33 out of 5 from 6 reviews.Read 15 Oct 2026 · kvraudio.com
- Security and DRM
- The maker says Helm has no DRM and allows users to study, modify and redistribute the software.Read 15 Oct 2026 · tytel.org
- Self-hosting
- Developers can build and install standalone, LV2 and VST binaries locally with make on Linux, with Xcode projects for macOS and Visual Studio solutions for Windows.Read 15 Oct 2026 · github.com
- Sequencing
- The product includes a step sequencer and a simple arpeggiator.Read 15 Oct 2026 · github.com
- Standalone and plugins
- Helm is available as a standalone synthesizer and as an LV2, VST, VST3 or AU plugin.Read 4 Oct 2026 · tytel.org
- Sub oscillator
- A sub oscillator includes shuffle waveshaping and an additional octave-down control.Read 15 Oct 2026 · tytel.org
- Supported systems
- The maker lists GNU/Linux, Mac OSX and Windows, with 32-bit and 64-bit versions.Read 4 Oct 2026 · tytel.org
- Synth features
- Helm includes dual oscillators with cross modulation, unison, a sub oscillator, filters, modulation, a step sequencer, an arpeggiator and audio effects.Read 4 Oct 2026 · github.com
- System requirements
- The FAQ lists Windows 7 or later, macOS 10.7 or later, Ubuntu 14.04 or later, and Debian Jessie or later.Read 15 Oct 2026 · tytel.org
- Unity integration
- Audio Helm integrates the synthesizer, sampler and sequencer into Unity through native audio components and controller or sequencer components.Read 15 Oct 2026 · tytel.org
- Unity scripting
- The Audio Helm page links to a component manual, scripting reference and tutorial videos for developers.Read 15 Oct 2026 · tytel.org
- Waveforms
- The manual lists 12 oscillator waveforms, including sine, triangle, square, saw and stepped or pyramid shapes.Read 15 Oct 2026 · tytel.org
Plans and prices
Pay what you want Free Pay what you want; you are free to pay nothing. Standalone or plugin · GNU/Linux, Mac OSX, Windows · 32-bit and 64-bit versions Read 4 Oct 2026 · tytel.org
Pay what you want Price not published Optional contribution; page displays $5 input and $10, $25, $50 and $100 amounts Standalone or plugin download · no DRM · pay nothing permitted Read 15 Oct 2026 · tytel.org
Strong points and limits
Strong points
- Free software with no DRM.
- Standalone and plugin versions are available.
- Includes a step sequencer and arpeggiator.
- Supports MIDI Learn for knobs and sliders.
Limits
- The release is in beta.
- The project has outstanding bugs.
- Listed system requirements specify older minimum operating systems.
Who it suits
Helm suits computer-based electronic music makers who want a free synthesizer in standalone or plugin form. Its broad platform and format support may suit users working across GNU/Linux, Mac OSX, or Windows.
Verdict
Helm provides a substantial set of synthesis and modulation tools at no required price. The beta status and outstanding bugs are important considerations for anyone choosing it.
Where Specifiction places it
- Software Synthesizers#4 of 388.6
