I found this list in an old 3.1 book from 1993, thought you guys might be interested in these specs. These are the so-called Multimedia PC Marketing Council's Requirements for a Multimedia PC.

part: min. spec | rec. spec

Computer
CPU: 80386sx, 16Mhz | 80386, 25MHz
RAM: 2 M | 4 M
Diskette: 3 1/2-inch, 1.44 M capacity | Same
Fixed disk: 30 M | 80 M
User input: 101-key keyboard, mouse | Same
I/O: 1 serial, 1 parallel, 1 joystick* | Same

Graphics
Display: VGA, 640x480, 16 colors | Same, 256 colors

Audio
Sampling type: Linear PCM | Same
Resolution: 8-bit | 16-bit
Sampling rate, DAC**: 11.025 and 22.05 kHz | 44.1 kHz
Sampling rate, ADC**: 11.025 kHz, microphone input | 22.05 and 44.1 kHz
Melody notes/ timbres: 6/3 simultaneous | 16/9 simultaneous
Percussive notes/ timbres: 2/2 simultaneous with melody | 16/8 simultaneous
External audio input: Microphone | Added stereo input
Internal mixing: CD, synthesizer, and DAC | Added aux. input
Audio Output: Line level, -10db, stereo*** | Same
MIDI I/O: In, Out, Thru, interrupt-driven | Same

CD-ROM Drives
Transfer Rate: 150kB/second, 16kB blocks | 64kB(with buffers)
Seek time: 1 second | Same
MTBF: 10,000 hours | Same
Mode: 1 | 2, Form 1 and 2
Subchannels: Q | P and R-W
Driver: Microsoft MSCDEX 2.2 | Same

*joystick input usually is provided by the audio adapter card.
**DAC is an abbreviation for digital-to-analog converter, a device that converts digital data to audio signals. ADC stands for analog-to-digital converter, which converts audio input signals to digital data.
***Referenced to standard consumer audio line level -0 db = 1 milliwatt into 600 ohms.