Creative Labs CD Kit  (250-0200/01/02)  Specifications  Faxback Doc. # 2898
Discovery CD 16

MUSIC SYNTHESIZER:

Enhanced FM OPL3 synthesizer using four operators
Frequency modulation FM sound generation
Compatible with previous Sound Blaster versions and Adlib FM
Two-operator mode:  20 voices (15 melodies and 5 percussion)
Four-operator mode:  11 voices (6 melodies and 5 percussion

STEREO DIGITIZED VOICE CHANNEL:

16-bit and 8-bit digitizing in stereo and monaural
Standard format for PCM data
Programmable sampling rate:  5 kHz to 44.1 kHz in 228 linear steps in DOS
16-bit and 8-bit DMA channels using a single interrupt
FIFO butter for high speed data transfer
Dynamic filtering for digital audio recording and playback

BUILT-IN DIGITAL/ANALOG MIXER:

Analog mixing of six audio sources:
     Digital audio (stereo)
     CD audio (stereo)
     Synthesized music (stereo)
     Extra line level audio (stereo)
     Microphone level audio (monaural)
     PC speaker (monaural)

Software programmable volume control:
     Master volume (stereo, 32-level attenuation in 2-dB steps)
     Digital audio (stereo, 32-level attenuation in 2-dB steps)
     CD audio (stereo, 32-level attenuation in 2-dB steps)
     Synthesized music (stereo, 32-level attenuation in 2-dB steps)
     Extra line level audio (stereo, 32-level attenuation in 2-dB steps)
     Microphone level audio (monaural, 32-level attenuation in 2-dB steps)
     PC speaker (monaural, 4-level attenuation in 6-dB steps)

Master treble and bass control (left and right channels):
     16 levels from -14 dB to +14 dB steps

Recording source control:  Independent selection of input sources for both
channels or a combination of the following:

     CD audio left channel
     CD audio right channel
     Synthesized music left channel
     Synthesized music right channel
     Line level audio left channel
     Line level audio right channel
     Microphone level audio

Output and input gain control:

BUILT-IN STEREO POWER AMPLIFIER

Four watts per channel (PMPO) with four ohms stereo output
Automatic gain control or fixed gain amplifier for microphone level
Output at line level selectable through jumper settings

MIDI INTERFACE

Built-in MIDI interface for connection to external MIDI devices
Sound Blaster compatible or MPU-401 UART mode
MIDI specification fixed at 31.2 kHz
FIFO for smooth operation
Internal expansion option for Wave Blaster daughter board

CD-ROM DRIVE

Performance:

Storage Capacity.......................................680 MB (12 cm disk)
                                                        180 MB (8 cm disk)
Buffer Memory........................................................64 KB
Transfer Rate..........................................150 KB/sec (normal)
                                                 300 KB/sec (double speed)
Access Time............................................350 KB/sec (normal)
                                                 450 KB/sec (double speed)
Audio Specifications:

Headphone Out............................................0.6 Vrms (RL:32W)
Line Out.................................................0.8 Vrms (RL:50W)
Number of Channels.......................................................2
Frequency Response...........................100 Hz to 20 kHz (headphones)
                                                20 Hz to 20 kHz (line out)
Dynamic Range...........................................80 dB (headphones)
                                                          80 dB (line out)
Signal-to-Noise Ratio...................................80 dB (headphones)
Distortion..................................................0.2 % at 1 kHz
Stereo Separation.......................................45 dB (headphones)
                                                          60 dB (line out)

(ALL/all-06/20/94)