2018-07-12 07:33:33 +00:00
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.TH DMID 1
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.SH NAME
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dmid \- MIDI to OPL3 converter using GENMIDI-type instrument banks
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.SH SYNOPSIS
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.B dmid
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[
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2018-08-31 16:01:21 +00:00
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.B -2s
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2018-07-12 07:33:33 +00:00
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] [
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.B -i
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.I bank
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] [
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.I file
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]
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.SH DESCRIPTION
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.I Dmid
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decodes MIDI instructions either from
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.I file
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or from standard input,
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and produces
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.SM OPL3
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instructions suitable for playback by
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.IR opl3 (1).
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To program instruments, an OPL2 instrument bank formatted as
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.SM GENMIDI
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lumps from
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.I doom
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must be provided.
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Since it is assumed that the bank is contained in a
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.I doom WAD
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file, its default location is
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.BR /mnt/wad/genmidi .
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This may be overridden with the
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.B -i
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command line option.
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.PP
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2018-08-31 16:01:21 +00:00
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The
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.B -s
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flag enables streaming mode,
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in which the input file is a stream of MIDI events.
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The file needn't provide any timing information such as MIDI tics.
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This is suitable for MIDI instruments.
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.PP
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2018-07-12 07:33:33 +00:00
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In
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.SM GENMIDI
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lumps, two voices are defined per instrument.
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For compatibility, the
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.B -2
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flag disables the second voice, reducing the number of
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.SM OPL
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channels needed.
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It also disables
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.SM OPL3
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specific features and produces an IMF-format stream,
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which can be used in other game engines.
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.SH EXAMPLES
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Play a MUS file from a
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.I doom WAD
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file:
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.IP
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.EX
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% games/wadfs /sys/games/lib/doom/doom2.wad
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createfile SW18_7: file already exists
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% games/mus /mnt/wad/d_doom | games/dmid | games/opl3 >/dev/audio
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.EE
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2018-08-31 16:01:21 +00:00
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.PP
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Play a MIDI stream from a USB device (see
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2018-10-27 22:05:05 +00:00
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.IR usb (3)):
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2018-08-31 16:01:21 +00:00
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.IP
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.EX
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% games/wadfs /sys/games/lib/doom/doom2.wad >[2]/dev/null
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% games/dmid -s /dev/usb/ep10.1/data | games/opl3 >/dev/audio
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.EE
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2018-07-12 07:33:33 +00:00
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.SH SOURCE
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.B /sys/src/games/dmid.c
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.SH "SEE ALSO"
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.IR games (1) ,
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.IR mus (1) ,
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.IR opl3 (1) ,
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.IR audio (3) ,
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2018-08-31 16:01:21 +00:00
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.IR usb (3) ,
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2018-07-12 07:33:33 +00:00
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.IR wadfs (4)
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.SH HISTORY
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.I Dmid
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first appeared in 9front (July, 2018).
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