Voice of the Computer Audio ICs The Yamaha OPL 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 Soundblaster® 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 Dolby® 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 Dolby® 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 .