soundtronics vs PlayStems

soundtronics reconstructs microphone input in real time. Speak just a single word, and waves of sound begin to ripple outward. This isn’t a simple echo — it’s a live remix, a live rework.

PlayStems is a powerful yet easy-to-use multi-track audio player designed for musicians. Import songs, split them into stems, and play all audio tracks perfectly in sync across iPhone, iPad, and Mac. Build your own song library with custom titles and artists, add multiple audio files to each song, and control every stem independently with a built-in mixer. Adjust playback speed and pitch in real time, jump through tracks with intuitive drag gestures, and create loop ranges for practice or live performance. Features: * Multi-track stem playback in perfect sync * Song library with custom titles and artists * Import and manage multiple audio files per song * Individual and master volume controls * Real-time speed and pitch adjustment * Smooth forward/backward scrubbing gestures * Loop playback for selected time ranges * AI-powered stem splitting into vocals, drums, bass, and other instruments tracks (runs on your device) Whether you’re rehearsing, performing live, remixing, or practicing difficult sections, StemSync gives you complete control over your music. # Free version * Free version is limited to 1 song if the user does not consent to analytics * With analytics consent, the free version is limited to 5 songs # Full version * Full version (perpetual license) has no limitations * HQ stem splitting models available for download (requires iOS 26.4 or later and about 2 GB of available memory on recent iPhone, iPad, or Mac with Apple Silicon).