twig — a tone wheel interval generator

An additive synthesizer: one fundamental pitch and twelve overtones above it, tuned by the chosen overtone system. Start in the Source panel, which sets the fundamental and what the overtones are made of, then Gain, which sets how loud each overtone is; the other surfaces shape those same twelve voices. Press Space to start and stop the sound. The number row sets the fundamental and the Q to ] row plays the overtones. The full list is in Settings, under Shortcuts.