OPL3(1) OPL3(1)
NAME
opl3 - OPL3 chip emulator
SYNOPSIS
opl3 [ -s ] [ -r rate ] [ file ]
DESCRIPTION
Opl3 is an emulator of a single Yamaha YMF262 chip, also
known as OPL3.
The emulated chip is programmed by a series of commands
either from file or from standard in. It then synthesizes
stereo 16-bit little-endian PCM samples at the chip's sam-
pling rate, 49.716 kHz, resamples them to audio(3)'s default
44.1 kHz rate, and writes them to standard out.
The -s flag enables streaming mode, in which the input is a
pipe streaming commands in identical format and semantics as
described below, but in real time.
Command format
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 input stream's sampling rate, by default
the same as the chip's output sampling rate. The -r parame-
ter sets the input sampling rate.
SOURCE
/sys/src/games/opl3
SEE ALSO
dmid(1), audio(3)
Yamaha ``YMF262 Manual'', 1994.
V. Arnost ``Programmer's Guide to Yamaha YMF 262/OPL3 FM
Music Synthesizer'', version 1.12 dated Nov. 23rd 2000.
HISTORY
Opl3 first appeared in 9front (July, 2018), based on
ymf262.c from the Multiple Arcade Machine Emulator ( MAME ).