v4.0 of the Dot Trombone app includes the loop mixer. Listen to Rand Barnetts trombone and bass driven music or load in your own loops via an XML document.
In v4.0, the transcriber side of the app allows you to load in mp3s via url. MP3s are saved to the local file system for faster access. Time/Pitch stretch by octaves, semitones and cents. Automatic saving saves your place. Colorful new design.