n-Track Studio is an audio and MIDI multitrack recorder that turns your Mac into a full-fledged recording studio. You can record and playback a virtually unlimited number of audio and MIDI tracks. The program supports simultaneous recording from multiple 16- and 24-bit soundcards, and real-time audio effects can be applied non-destructively to each track. Built-in effects include multiband compression, delay, graphic EQ, pitch shift and time stretch, parametric EQ and spectrum analyzer with guitar tuner.
The program can use third party AU and VST plug-ins to process in real-time audio signals. Effect can also be used to process the recorded signal in real-time so that the computer can act as a multi-effects device. MIDI tracks can be imported and exported to regular MIDI files, and edited using the built in piano-roll-based MIDI editing window. The program supports AUi and VSTi instrument plug-ins for sample-accurate software-MIDI playback.
All the audio tracks are saved as standard WAV files and mixed "on the fly" during playback.