NEC DIRECTION L Service Manual page 112

Sound System
Audio integrated on system board based on Yamaha OPL3-SA3 and OPL4-ML (in some
systems)
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Compatible with Sound Blaster Pro™, Sound Blaster™ 2.0, Ad Lib™,
MPU-401, and Microsoft
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Stereo jacks
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Built-in 16-bit sigma-delta stereo CODEC
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Dual DMA channel and built-in FIFOs for full duplex simultaneous playback and
record in 16-bit stereo
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Programmable sample rate from 5.5 KHz to 48 KHz for recording and playback
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6-bit (64 steps) master volume control
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IMA-compatible adaptive differential pulse code modulation (ADPCM), A-Law
and u-Law compression/decompression
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DMA Demand mode, MPU-401 compatible MIDI interface
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Wave Blaster upgradeable for wavetable synthesis
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Built in 6-channel stereo mixer; supports 3 channel analog input
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Software programmable ISA bus interface (DMA, Interrupt, I/O address)
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Power down mode, dual master clock input
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Sound Retreival System (SRS) for 3D sound effects
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Complies with General MIDI system level 1
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Wavetable synthesis to generate up to 24 voices simultaneously
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MIDI/Game connector
Dimensions
System Unit
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Height 17.1 in. (43.43 cm)
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Desktop Width
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Minitower Width
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Depth 17.3 in. (43.94 cm)
Windows Sound System™ for PC sound applications
®
microphone in, line in, line out
supports MIDI device or gaming device
6.5 in. (16.51 cm)
7.8 in. (19.81)
System Specifications A-5