What sample rates and audio file formats is Tracker working with?

Polyend Tracker works with uncompressed PCM wave files only.
Tracker’s sampling and internal audio processing rate is 44.1 kHz (16, 24 and float 32 bit).

All other WAV files with different properties are being converted to supported 44.1kHz 16bit mono PCM files automatically.

Stereo .wav files will be converted to mono automatically.