NOS

Brand new, unused. Aztech PCI 368-DSP sound card featuring the VLSI VT21702DA "Thunderbird 128" audio chip, developed with QSound Labs for hardware-accelerated 3D positional audio.

VLSI Thunderbird 128 chip (0.35 micron), 160-pin MQFP package

External SigmaTel STAC9704T 18-bit AC'97 codec

4-channel output (2 or 4 speakers + headphones)

Full-duplex audio, up to 48kHz sampling

Hardware Q3D / Q3D 2.0 (QSound) 3D positional audio engine — supports A3D 1.0 and EAX 1.0

Built-in MPU-401 MIDI/Game Port, wavetable header, MPC2/MPC3 CD-audio connectors

SNR up to 98dB, 0.02% THD

What's included: Sound card, original driver CD, printed manual — complete kit.

Compatibility: Windows 9x (also WinNT 4.0 drivers available for this chipset).

Condition: Brand new, never installed. Complete with original CD and manual — rare to find this complete for a card of this era.

Ideal for: Retro/vintage PC builders chasing period-correct QSound/A3D-era 3D audio — a step above standard AC'97 cards for DOS/Win98 gaming rigs.