How to use Load up to 4 WAV or MP3 files. Press play, then tap A/B/C/D to switch instantly — playback position is preserved. Ideal for A/B comparisons in the car.

Loading files on your phone 📱 iPhone — Download the WAV files. Open the Files app and save them to "On My iPhone." When you tap a slot above, choose Browse → On My iPhone to find them. 🤖 Android — Download the WAV files — they go to your Downloads folder automatically. When you tap a slot above, navigate to Downloads to find them.