Gravis Ultrasound Tech Specs Header

The Gravis UltraSound makes use of the highly-integrated Interwave chip developed by Advanced Micro Devices. The Interwave(tm) chip was developed as the result of a joint venture between Gravis and AMD utilizing Advanced Gravis' UltraSound(tm) audio technology. The Interwave chip is the first to provide integration of the MPC-3 multimedia requirements. This integrated technology allows Gravis to deliver more honest reproduction of sound and reduce the card's cost without sacrificing the quality of the other components.

Easy Windows(R) 95 Plug & Play Setup.
Full Duplex-simultaneous record and playback for Internet applications and more.
32-voice General MIDI wavetable sound card.
Hardware mixing of 32 channels for dynamic digital effects.
Compatible with every Windows 95 application.
Expandable! Add up to 8 MB RAM for custom sounds and stunning effects processing.

(Pro Version comes with 512K RAM built-in.)
AMD Interwave(tm) GFA1 DDSP chip
32-voice wavetable synthesizer
32 channels for digital effects
CD-quality recording and playback at 16-bit, 48 KHz
Hardware mixing so you won't sacrifice game performance for good music
4:1 ADPCM, A-law, and æ-law compression
Slots for up to 8 MB of RAM memory
Line In, Line Out, Mono Mic In, Atapi Enhanced IDE CD-ROM interface, CD audio, and
Joystick/MPU 401 UART-compatible MIDI connectors
20 Hz to 20 KHz ñ 3dB line output frequency response
<0.05% total harmonic distortion with an input of -10dBm
80dB signal to noise ratio (line in to line out)

Technical Specifications
Hardware Required IBM 486 SX-33 or better, Hard Drive (30MB free), CD-ROM
Onboard Memory 1MB of ROM (expandable to 8MB of RAM)
System Required DOS 5.0 or greater - Microsoft compatible mouse - VGA and Windows(tm) '95 recommended - 16-bit bus slot
Digital Audio 8- and 16-bit
Digital Stereo Channels: 16
Voices 32
Digital Recording 8- or 16-bit (stereo)
Variable Sample Rates 2 to 48 kHz
MIDI Support Industry standard (MPU401-6850 UART)- 192 General MIDI patches included
MIDI Connectors In, Out, Through with optional MIDI Adapter
Card Connectors 15-pin joystick & MIDI connector - 3 jacks for audio line out, audio line in and microphone in internal CD-audio line in - IDE CD-ROM Interface
Warranty Three years


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