Windows XP SP2 or Win2k SP4 with DirectX 8 or later and audio card that can sample at 16000Hz
functional limitations:
Does not work on WinNT, WinMe, Win95 and Win98
Wtune description
spectrum analyzer/frequency counter to check your vocal accuracy and/or your instrument intonation
single track recorder to MIDI file of whatever is captured by your PC soundcard (for instance, when the microphone input is used, what you are singing or what you are playing with an acoustic instrument) so that you can later obtain the relevant score once you import the MIDI file into your usual notation program (this MIDI feature requires a dedicated plugin available upon donation)