ref: 2e5cd278d75be0cc046ac66259cc8d20af04b0c8
dir: /sys/man/1/opl3/
.TH OPL3 1 .SH NAME opl3 \- OPL3 chip emulator .SH SYNOPSIS .B opl3 [ .B -n .I rate ] [ .I file ] .SH DESCRIPTION .I Opl3 is an emulator of a single Yamaha 262 chip, also known as .SM OPL3. .PP The emulated chip is programmed by a stream of commands either from .I file or from standard in. It then synthesizes a number of stereo 16 bit little-endian samples for a sampling rate of 44.1 kHz, and writes them to standard out. .PP Commands are 5 bytes wide, in little-endian byte order: .PP .RS .IR register [2] .IR value [1] .IR delay [2] .RE .PP Each command specifies a .I value to be written to an .SM OPL3 chip .IR register , modifying its internal state. .PP The .I delay field provides timing. It is a multiple of a command period, during which the .SM OPL3 chip may be sampled before processing the next command. The period itself is the inverse of the command rate, 44100 Hz by default. This rate can be set using the .B -n parameter. .SH SOURCE .B /sys/src/games/opl3 .SH "SEE ALSO" .IR audio (3) .SH HISTORY .I Opl3 first appeared in 9front (July, 2018), based on .I ymf262.c from the Multiple Arcade Machine Emulator ( .SM MAME ).