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 ProTM and Windows Sound SystemTM compatibility and will operate with applications designed for those environments. Software drivers and applications from ESS Technology are included for Windows 95TM, 98TM, and NTTM.
Crystal-MM-HP requires +5V from the PC/104 bus. Output power is 0.5W RMS per channel into 8Ω.
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
