Our Singletrack Audio Post Production Algorithms need one mono or stereo master audio file as input, where the content is already mixed (multiple speakers, music). Auphonic then processes the master audio file and adjusts loudness, filters noise, etc.
The Multitrack Post Production Algorithms require multiple, parallel input files - one file per track (each track might be stereo or mono).
This is useful if you record every speaker of your conversation and also music in a separate track. Then we can automatically mix all tracks and perform automatic gating, crosstalk removal, automatic ducking, etc.
Please read the Multitrack Best Practice before using our multitrack algorithms!