Gravis Ultrasound MAX

Technical details
Name:	Ultrasound MAX
Company:	Advanced Gravis
Chipset:	Gravis GF1, Crystal CS4231A-KL
Bus:	ISA 16 bit
Connectors:	Line-Out, Speaker-Out, Line-In Mic-In, Game/Midi (with extender box), CD-ROM Sony/Panasonic/Mitsumi
FCC-ID:	HYN412-0039-AA
Manufactured:	1995

The GUS MAX brings a CS4231 codec chip that adds mixing capabilities as well as support for Windows Sound System standard (however on an unusual port). Rev 1.8.
The Gravis Ultrasound uses a different approach as Creatives Soundblaster Series. The GF1 is a fixed-function DSP that can play only samples from its own RAM. From there it can interpolate and mix 32 independent channels that are upsampled to the output sample rate. When using more than 14 active channels the output sample rate goes gradually down from 44100 Hz to 19293 Hz when all 32 channels play.
This design makes the card perfect for tracker style music. When software has native support it can use the card to play nearly without CPU load music. (only note changes have to be transmitted)

Gravis Ultrasound Drivers and Software


Gravis Ultrasound MAX specific software


Wavetable Comparison Recordings