YM3812

The YM3812 has the following features including FM sound generation system for realistic sound;Mode selection of simultaneous voicing of 9 sounds or 6 melody sounds and S rhythm sounds is possible. Both modes can produce various sounds;Built-in vibrato oscillator/amplitude modulation oscillator (AM);Composite sine wave speech synthesis also possible;Input/output TTL compatible;Si-gate CMOS-LSI;SV single power supply.

The YM3812 OPLII(FM OPERATOR type-LII) is an LSI IC which can be used as a sound generation system for computer apparatus, teletext instruments, etc. The OPLII employs frequency modulation for the melody sounds, and has rhythm sounds very close to those of natural musical instruments, making it possible to synthesize various tones by software control from a CPU.In addition, an LFO is built in to generate effects such as vibrato and tremolo, thus reducing the software load.The OPLII can be easily interfaced with the DAC YM3014.OPLII has two voice modes: simultaneous voicing of 9 sounds, and 6 melody sounds and 5 rhythm sounds. Furthermore, these melody sounds can be produced with different voices at one time. Operation by software control makes the OPLII suitable as a sound generation system for computer-based apparatus such as game machines, teletext, etc.The synthesizer, which mixes several waveforms, and the noise generator are used to produce each individual rhythm sound. Five voices are available: Bass drum (BD), Snare drum (SD),High hat (HH), Top cymbal (TC), and Tom (TOM).

The YM3812 products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite).