OPL3(1) OPL3(1)
NAME
opl3 - OPL3 chip emulator
SYNOPSIS
opl3 [ -n rate ] [ file ]
DESCRIPTION
Opl3 is an emulator of a single Yamaha 262 chip, also known
as OPL3.
The emulated chip is programmed by a stream of commands
either from 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.
Commands are 5 bytes wide, in little-endian byte order:
register[2] value[1] delay[2]
Each command specifies a value to be written to an OPL3 chip
register, modifying its internal state.
The delay field provides timing. It is a multiple of a com-
mand period, during which the 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 -n parameter.
SOURCE
/sys/src/games/opl3
SEE ALSO
audio(3)
HISTORY
Opl3 first appeared in 9front (July, 2018), based on
ymf262.c from the Multiple Arcade Machine Emulator ( MAME ).
Page 1 Plan 9 (printed 12/15/25)