SideBand is a music and radio application developed by Wil Macaulay, available for iPhone users. It is a powerful tool for musicians who want to learn and practice tunes by ear. With SideBand, you can slow down and loop sections of a tune, import any unprotected music from the Music app, iCloud Files application or drag tunes from your desktop.

The application supports all iPhone screen sizes as well as iPad. You can use slide-over while listening to your Music files to quickly import on iPad and use split-screen to listen while viewing music. SideBand offers a wide range of features, including adjusting tempo from half-speed to double speed, transpose - change the key by semi-tones up to an octave higher or lower, change the tuning - adjust the pitch of an out-of-tune recording, and import from any other app that can export an audio file - wav, mp3 and AAC files are supported.

With SideBand, you have a powerful tool to learn and practice tunes by ear, and with its various features, you can customize and adjust the music to fit your voice or instrument. Overall, SideBand is a must-have application for all musicians who want to improve their skills and take their music to the next level.