Use as/for: • Tool for Sound Design • Experimental Musical Instrument • Fun Key Features: • Fast and lightweight • Four tracks • Stereo Mode • Loads sound files of up to seven minutes length in any audio format • Effects like Convolution Reverb, Channel Vocoder, Phase Vocoder First use instructions: 1. Press POWER. Upper right power button turns on audio engine which is TURNED OFF on startup to save battery. 2. Press EJECT. Load a sound file. 3. Press PLAY. A manual can be found here: https://grainstorm.rocks.me/instructions.html There is an In-App-Purchase which among other things lets you record the output. Please consider the free version as a demo version.