CRYSTAL-MM-HP
User Manual v2.0 September 2007
Diamond Systems Corporation
P.
3
1. Features and Specifications
Crystal-MM-HP is a dual-channel audio module for PC/104 embedded systems. It provides 16-bit stereo
recording and playback with sample rates up to 44.1kHz. Features include full-duplex (simultaneous
record and playback) capability, plug and play configuration, multiple input and output channels, multiple
input and output user connection options, on-board 6-channel mixer, and built-in 20-voice FM synthesizer
compatible with the Yamaha OPL3. The board can also perform ADPCM compression and
decompression of .WAV files. The board uses ESS Technology Inc.’s ES1868/1869 AudioDrive chip.
Inputs include stereo line in, stereo CD in (connected to auxiliary input), mono microphone in, and mono
PC speaker in. Outputs include stereo line out, stereo amplified speaker out, and analog version of PC
speaker out.
Crystal-MM-HP provides full SoundBlaster Pro
TM
and Windows Sound System
TM
compatibility and will
operate with applications designed for those environments. Software drivers and applications from ESS
Technology are included for Windows 95
TM
, 98
TM
, and NT
TM
.
Crystal-MM-HP re5V from the PC/104 bus. Output power is 0.5W RMS per channel into 8
Ω
.
CMM-HP-EX contain a heatsink to dissipate the higher levels of heat generated by the higher output
levels of the audio amplifier. This heatsink fits within the envelope of the PC/104 specification and will
provide ample clearance for stacking a board above.
Features
SoundBlaster, SoundBlaster Pro, Windows Sound System compatibility
Full duplex capability
Plug and play configuration
4KHz to 44.1KHz sample rates
16-bit and 8-bit stereo recording and playback
On-board ADPCM compression/decompression
Yamaha OPL3 compatible FM music synthesis
Built-in stereo audio power amplifier
Built-in dual PC game port
Manual and/or software volume control
Hardware volume up/down/mute controls
Windows 95, Windows 98, and Windows NT driver and application software included