Voice of the Computer
Audio ICs
The Yamaha OPL Æ chips are the industry
standard music synthesizers found in most personal computer audio
boards. The OPL3 uses FM synthesis
techniques proprietary to Yamaha. The OPL3L
is a low power FM synthesizer in a small package. The recently
announced OPL3-SA single chip
audio solution integrates audio CODEC, DOS games compatibility
and D/A converter with FM synthesis in one low-profile package.
The OPL3-SA replaces up to four
devices used in current SoundblasterÆ compatible audio
subsystems, and is ideal for motherboard applications.
For the high end of sound quality, the OPL4
family combines synthesis techniques to produce rich musical
sound using Yamaha's unique FM-enhanced wavetable synthesis. The
new OPL4-ML combines the
FM/wavetable synthesizer with a wavetable sample ROM and General
MIDI interface into a low-cost, 100-pin package. The
OPL4-ML allows for the first truly
cost-effective implementation of wavetable synthesis in the
mainstream personal computer.
Yamaha also offers a variety of other audio
chips, ranging from special effects to Karaoke to DolbyÆ Pro
Logic.
OPL3
(YMF262)
FM Music Synthesizer
Features
- Up to 18 simultaneous sounds.
- Two- or four-operator synthesis modes.
- 24 pin SOP package.
- YAC512 audio DAC completes OPL3 chipset.
OPL3L
(YMF289)
Low Power FM Music Synthesizer
Features
- Software compatible with the OPL3.
- Powerdown mode.
- Selectable 3.3V/5V operation.
- 48 pin small-footprint, low-profile
package.
- Uses Yamaha YAC516 or any standard audio
DAC.
OPL3-SA
(YMF701)
Single Chip PC Audio Solution
Features
- Integrates FM synthesizer, audio CODEC,
DOS games compatibility, and audio DAC in one 100-pin
low-profile package.
- Ideal for motherboard applications.
- Software compatible with the OPL3.
- Powerdown mode.
- Selectable 3.3V/5V operation.
OPL4-ML
(YMF704)
Integrated Wavetable Synthesizer
Features
- Features Yamaha's unique 44-voice
FM-enhanced wavetable synthesis.
- Combines wavetable and FM synthesizer,
1MB wavetable ROM, and General MIDI processor in one
100-pin low-profile package.
- Yamaha SA-1 chip, or any standard Audio
CODEC plus DAC, completes audio subsystem.
- Easy and affordable manufacturing upgrade
from basic FM sound to wavetable sound using a common
printed circuit board.
YMZ280B
8 Channel PCM/ADPCM Audio
Features
- 4-bit ADPCM or 8/16-bit PCM.
- Up to 16MB Wavedata in ROM or SRAM
- Separate Start, Stop, Loop Addresses
- 16 Panpot, 256 Volume & Pitch
Settings
- 64-pin plastic QFP
YSS225
YSOUND Effects Processor
Features
- 4 Stereo Inputs (2 channels x 4
16/18-bits)
- Two or four 256k PSRAM supported
- 2 Stereo Outputs (2 channels x 2
16/18-bits)
- Uploadable Effects Programs
- Sampling frequency from 32kHz~48kHz
- 100-pin plastic QFP
YSS215
Audio/Video DolbyÆ Surround Processor
Features
- Modified B-type Noise Reduction Decoder
- 256k External PSRAM used for Digital
Delay
- Serial µP Interface for Parameter
Control
- 44.1kHz Sampling Frequency on Internal
A/D & D/A
- Multiple Outputs (LF, RF, LR, RR, plus L,
C, R)
- 64-pin plastic QFP
YSS216B
Karaoke Processor 2
Features
- 3 Analog Inputs (Left, Right,
Microphone), one Output
- Built-in 15-bit A/D and D/A Converters
- Supports - Key Control, Voice Cancel,
Echo, Surround
- Stereo Digital Inputs and Outputs
Supported
- Sampling frequency 44.1kHz
- 64-pin plastic QFP
YM2413
FM Sound
Features
- FM Sound Generator
- Up to 9 Simultaneous Voices
- 15 Built-in Instruments + 1
User-definable
- Internal Digital to Analog Converter
- Vibrato, Envelope Generators
- 18-pin plastic DIP
YM2149
Software Controlled Sound Generator
Features
- 3 Sound + 1 Noise Generators &
Internal DAC
- Two 8-bit Parallel Ports
- 5-bit Envelope Generator/ 4-bit Volume
Control
- YM3439 is CMOS, YMZ284 is 18-pin w/o
Ports
- 40-pin plastic DIP