Support multiple tracks #3
Description
Features:
- Length – each track has its own length (in whole meters)
- Instrument – tracks can have different instruments (&i1=djembe1)
- URL – encode multiple tracks in URL (like /?track1=Bts&track2=stB)
- Shift – play a track with a shift by 1/N of the meter (&s1=1)
- Volume – adjust volume per track (&v1=100&v2=50)