Amstrad CPC playing 4 channel music using the Betalicious Buzzer engine

BSC of Symbiosis^GCS begun a new, special musik projekt, which will consist of many releases of very special musikal pieces.
The first piece is called Musik100 and is dedicated to Cocio & Finsprit, two renowned composers well known to the connoiseur.
On a more serious note: This was made with a new kind of audio engine called "Betalicious Buzzer". The engine is based on 1-bit ZX Spectrum music and the so-called sync buzzer effect which plays around with the PSGs volume envelope registers for some nice bass tones. There's more where that came from :)
Features:
- 4 channels of audio
- realtime sawtooth synthesis
- with variable duty-cycle (effectively a crude high pass filter)