Helm is compatible with GNU/Linux, Mac OSX, and Windows operating systems. You can utilize Helm as a standalone synthesizer or as a plugin in various formats such as LV2, VST, VST3, or AU, and it is available in both 32-bit and 64-bit versions. This flexibility allows you to use Helm anywhere without concerns about digital rights management (DRM), and it empowers you to examine, modify, and share the source code, whether in its original form or altered. As a software synthesizer, Helm enables users to generate electronic music directly from their computers. Its philosophy of being "free as in freedom" means you have complete control over the software rather than being controlled by it. In financial terms, Helm operates on a "pay what you want" model, giving you the option to use it without any payment if you choose. Moreover, any sounds produced by Helm are owned by the user, granting you copyright over every sound you create. You can easily toggle various modules on or off using the small power buttons located in the top left corner of the interface. Among these modules, the SUB module serves as one of Helm's primary sound generators, managing a single oscillator that typically plays an octave lower than the note currently being struck. This intuitive design ensures that users can quickly experiment and craft their unique sounds.