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  • M-ACPA MIDI Mapping Page created

    From Louis Ohland@21:1/5 to All on Tue May 30 07:13:21 2023
    http://ps-2.kev009.com/ohland/M-ACPA_MIDI_Mapping/M-ACPA_MIDI_Mapping.html

    I am kontused on the mapping of the percussion track. The README
    suggests all three mappings use a percussion track.

    General MIDI track maps Track 16 Input to Track 10 output. So what does
    Channel Ten Input do?

    IBM's README says that the Base synth "map channels thirteen through
    sixteen as the IBM M-AUDIO MIDI SYNTH and also change the destination of
    track sixteen to track ten."

    I am konfuzed like Helga von Pain was beating on me with a riot baton.

    More meditation required.

    --- SoupGate-Win32 v1.05
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  • From Louis Ohland@21:1/5 to All on Wed May 31 07:24:28 2023
    http://midi.teragonaudio.com/tutr/win95.htm#w3

    Microsoft didn't have time to finish rewriting the MIDI Mapper for Win95
    before the OS's release. Subsequently, MS created the IDFedit.zip
    utility which you can download from my Web Site now. This utility can be
    used to create an Instrument Definition File (ie, IDF) in which you
    determine how the GM patch set and drum note assignments are remapped.
    Then, you install this IDF as if it were another MIDI device upon your
    system, and use it for MIDI IN and OUT.

    http://midi.teragonaudio.com/midi/software/idfedit.zip

    --- SoupGate-Win32 v1.05
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  • From Louis Ohland@21:1/5 to All on Wed May 31 07:52:30 2023
  • From Louis Ohland@21:1/5 to All on Wed May 31 08:31:43 2023
    https://web.archive.org/web/20090204141720/http://math.boisestate.edu/gas/midi/html/midi_mapper.html


    MICROSOFT'S SPECIFICATION

    Microsoft Corporation has produced their own version of the General MIDI specification, complicating things somewhat. The Microsoft standards
    require less of the equipment than the General MIDI standard. General
    MIDI supports 32 notes sounding at the same time on all 16 MIDI
    channels. Microsoft has defined two less capable devices -- a "basic"
    device and an "extended" one.

    Basic Device

    A Basic device must be capable of playing 6 notes, in at least 3
    different instruments, as well as 5 percussion notes. All sound cards, including the original 8-bit sound cards, can do this. Basic devices
    play the melodic instruments on channels 13 through 15, with the drums
    on channel 16.

    Extended Device

    Extended devices must be capable of 16 melodic notes, using 9
    instruments, plus 16 notes on 8 percussive instruments. Extended devices
    use channels 1 through 9 for melodic sounds, with the drum track on
    channel 10.

    --- SoupGate-Win32 v1.05
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  • From Louis Ohland@21:1/5 to All on Wed May 31 08:26:48 2023
    http://www.cs.uccs.edu/~cs525/midi/midi.html

    Use MIDI channels 13 through 16 for base-level synthesizer data
    (reserve channel 16 for key-based percussion instruments).

    Use MIDI channels 1 through 10 for extended synthesizer data (reserve
    channel 1O for key-based percussion instruments).

    --- SoupGate-Win32 v1.05
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  • From Louis Ohland@21:1/5 to All on Wed May 31 08:56:25 2023
    So... a MIDI channel can be analogous to a DMA channel, where a track
    can be assigned to a channel.

    OK. Still does not clarify the percussion [drum?] being assigned to
    Channel 10. In, Out, double to the rear...

    --- SoupGate-Win32 v1.05
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  • From Louis Ohland@21:1/5 to All on Wed May 31 11:10:52 2023
    https://www.academictutorials.com/midi/midi-the-general-system.asp

    The General MIDI system utilizes MIDI Channels 1-9 and 11-16 for
    chromatic instrument sounds, while Channel number 10 is utilized for "key-based" percussion sounds. These instrument sounds are grouped into
    "sets" of related sounds. For example, program numbers 1-8 are piano
    sounds, 9-16 are chromatic percussion sounds, 17-24 are organ sounds,
    25-32 are guitar sounds, etc.

    For the instrument sounds on channels 1-9 and 11-16, the note number in
    a Note On message is used to select the pitch of the sound which will be played. For example if the Vibraphone instrument (program number 12) has
    been selected on Channel 3, then playing note number 60 on Channel 3
    would play the middle C note (this would be the default note to pitch assignment on most instruments), and note number 59 on Channel 3 would
    play B below middle C. Both notes would be played using the Vibraphone
    sound.

    The General MIDI percussion sounds are set on Channel 10. For these
    "key-based" sounds, the note number data in a Note On message is used differently. Note numbers on Channel 10 are used to select which drum
    sound will be played. For example, a Note On message on Channel 10 with
    note number 60 will play a Hi Bongo drum sound. Note number 59 on
    Channel 10 will play the Ride Cymbal 2 sound.

    It should be noted that the General MIDI system specifies sounds using
    program numbers 1 through 128. The MIDI Program Change message used to
    select these sounds uses an 8-bit byte, which corresponds to decimal
    numbering from 0 through 127, to specify the desired program number.
    Thus, to select GM sound number 10, the Glockenspiel, the Program Change message will have a data byte with the decimal value 9.

    The General MIDI system specifies which instrument or sound corresponds
    with each program/patch number, but General MIDI does not specify how
    these sounds are produced. Thus, program number 1 should select the
    Acoustic Grand Piano sound on any General MIDI instrument. However, the Acoustic Grand Piano sound on two General MIDI synthesizers which use
    different synthesis techniques may sound quite different.

    --- SoupGate-Win32 v1.05
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