DMID(1) DMID(1)
NAME
dmid - MIDI to OPL3 converter using GENMIDI-type instrument
banks
SYNOPSIS
dmid [ -2s ] [ -i bank ] [ file ]
DESCRIPTION
Dmid decodes MIDI instructions either from file or from
standard input, and produces OPL3 instructions suitable for
playback by opl3(1). To program instruments, an OPL2 instru-
ment bank formatted as GENMIDI lumps from doom must be pro-
vided. Since it is assumed that the bank is contained in a
doom WAD file, its default location is /mnt/wad/genmidi.
This may be overridden with the -i command line option.
The -s flag enables streaming mode, in which the input file
is a stream of MIDI events. The file needn't provide any
timing information such as MIDI tics. This is suitable for
MIDI instruments.
In GENMIDI lumps, two voices are defined per instrument.
For compatibility, the -2 flag disables the second voice,
reducing the number of OPL channels needed. It also dis-
ables OPL3 specific features and produces an IMF-format
stream, which can be used in other game engines.
EXAMPLES
Play a MUS file from a doom WAD file:
% games/wadfs /sys/games/lib/doom/doom2.wad
createfile SW18_7: file already exists
% games/mus /mnt/wad/d_doom | games/dmid | games/opl3 >/dev/audio
Play a MIDI stream from a USB device (see usb(3)):
% games/wadfs /sys/games/lib/doom/doom2.wad >[2]/dev/null
% games/dmid -s /dev/usb/ep10.1/data | games/opl3 >/dev/audio
SOURCE
/sys/src/games/dmid.c
SEE ALSO
games(1), mus(1), opl3(1), audio(3), usb(3), wadfs(4)
HISTORY
Dmid first appeared in 9front (July, 2018).
Page 1 Plan 9 (printed 4/18/24)