MJSFX

MJSFX is a free, native macOS sounds and effects design studio.

Start from a generator (lasers, explosions, blips, hits, and so on) and build with layered oscillators, each with its own pitch sweep, envelope, and filters. Chain reverb, delay, distortion, bitcrush, and more per layer or across the whole sound, plus LFOs that can modulate any knob, including other LFOs. Everything exports to WAV, including retro formats like 22kHz/8-bit and per-layer stems.

It has serious MIDI hardware support with soft pickup and per-controller profiles, a built-in library with folders and filtering, a live "Sound Portrait" visualization drawn from real engine output, and twenty themes plus a browser-based theme builder.

No ads, no telemetry, and you own everything you make.