​The Digidesign Audiomedia III is a PCI audio interface card designed for Macintosh and Windows systems, popular in the late 1990s and early 2000s.

Key Specifications

Analog I/O: 2 inputs and 2 outputs via unbalanced RCA connectors (-10 dBV)

Digital I/O: Stereo S/PDIF (RCA) supporting up to 24-bit resolution

Analog Converter: 18-bit, 1-bit Delta-Sigma with 128x oversampling

Sample Rates: 11.025, 22.05, 44.1, and 48 kHz

Frequency Response: 20 Hz – 20 kHz

Signal-to-Noise Ratio: 88 dB unweighted; 90 dB A-weighted

Total Harmonic Distortion (THD): 0.008% at 1 kHz

Power Consumption: 6.6 watts

Clock Speed: 66 MHz

Connector Type: RCA

Compatibility

Mac OS: Compatible with Mac OS 7.6 through Mac OS X Tiger (10.4)

Windows: Supports Windows 98, Me, and XP

When used with Pro Tools LE 5.x, the Audiomedia III can handle four simultaneous inputs or outputs by utilizing both analog and digital I/O.