Helm vs VCV Rack

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.

VCV Rack is a virtual modular platform modeled on Eurorack synthesizers, available as a standalone app for Linux, macOS, and Windows. It supports learning, live performance, algorithmic and generative composition, and multitrack recording. Its ecosystem includes 30+ built-in modules, 170+ official modules, and 2000+ modules in the VCV Library. For hardware connections, it offers audio or CV input and output across multiple interfaces, plus polyphonic MIDI input and output. Rack Pro adds VST2, VST3, Audio Unit, and CLAP support, with integration tested against listed DAWs including Ableton Live, Cubase, Reaper, Logic Pro, and others. It can render audio offline through a DAW and supports up to 16 audio input/output channels, MIDI, and parameter automation. Rack Free is open-source with community support; Pro includes professional support and costs $149, paid once. VCV Host can load VST plugins into Rack and control their parameters with CV, but is purchased separately. Rack requires 1 GB memory and disk space; dedicated Nvidia or AMD graphics are recommended.