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