TapeDesk is a four-track tape with a synth beside it, for iPhone and iPad. A song can start on the phone's mic and leave the app as a mixed file. tape A take goes onto the armed track when you press rec. The speed fader runs from 0.25x to 2x and the pitch moves with it, so at half speed the whole song sits an octave lower. With loop on, each pass adds a layer over the last one. For recording alone there is a threshold on rec, and the take waits for the first sound. A tape holds ten minutes on…