Caustic 3 is a mobile‑focused music creation environment inspired by classic rack‑mount synthesizers and sampler rigs. 

Build your rack with up to 14 machines, choosing from:

• SubSynth – virtual‑analog subtractive synth

• PCMSynth – multi‑sample wave synthesizer

• BassLine – 303‑style mono synth

• BeatBox – 8‑channel sample‑based drum machine

• PadSynth – harmonic‑table pad generator

• 8BitSynth – equation‑based chiptune synthesizer

• Modular – fully routable, patch‑based synthesizer

• Organ – tonewheel organ with rotary speaker

• Vocoder – 8‑band harmonic vocoder

• FMSynth – 3‑operator FM synthesizer

• KSSynth – Karplus‑Strong string model

• SawSynth – supersaw polysynth

Additional features include:

• Effects rack with 2 slots per machine (20 effect types)

• Mixer with global delay/reverb

• Master section with EQ and limiter

• Full song sequencer

• Automation on most controls with detailed curve editors

File support:

• All files stored in user‑accessible storage

• WAV import for PCMSynth, BeatBox, and Vocoder

• Supports 8/16/24/32‑bit WAV at any sample rate

• PCMSynth loads SoundFont (.sf2) and FL Mobile (.instr, .zip)

MIDI:

• Class‑compliant USB MIDI controllers supported via USB OTG (Android 3.2+)

Desktop versions:  

Free, full versions for Windows, macOS, and Linux (via WINE).