The Atari ST soundchip is the same as in the Amstrad, Oric and ZX Spectrum - Yamaha YM. The ST is a 16 bit "monster" with 4 bit soundchip. On the other hand even the A1000 have Paula which is 8 bit sound chip. On my Amiga 500/1200/4000 I had no trouble playing YM/SID/NSF songs with DeliTracker, while try playing Mod/Octamed songs on the Atari ST and you will decide by yourself which machine had the better sound. The Atari Falcon have better sound than the Amiga, but the Falcon had very limited production and it is not really an ST.
