Re: XG programChange -- Was: Re: [fluid-dev] invalid instrument/drum selection

[Peter Gebauer]

Hi Jimmy,

migth this be what happens with my Yamaha P-85 when I change istrument?

Logged midi events when changing:

  2754,M Audio Delta 1010LT:0,System exclusive,,10,f0 43 73 7f 4b 11 00 45 
  00 f7
  2752,M Audio Delta 1010LT:0,Control change,1,94,0
  2752,M Audio Delta 1010LT:0,System exclusive,,9,f0 43 10 4c 08 00 11 7f f7
  2751,M Audio Delta 1010LT:0,System exclusive,,10,f0 43 10 4c 02 01 40 00 
  00 f7
  2749,M Audio Delta 1010LT:0,Control change,1,91,25
  2749,M Audio Delta 1010LT:0,System exclusive,,10,f0 43 10 4c 02 01 00 01 
  11 f7
  2747,M Audio Delta 1010LT:0,System exclusive,,10,f0 43 73 7f 4b 11 00 45 
  7f f7
  2745,M Audio Delta 1010LT:0,Program change,1,0,
  2745,M Audio Delta 1010LT:0,Control change,1,32,112
  2745,M Audio Delta 1010LT:0,Control change,1,0,0

/Peter


On 2009-02-15 (Sun) 16:30, jimmy wrote:
> Hi Josh,
> 
> About XG (and GS) program changes, and how missing instruments might be 
> handled,  Here are some comments and observations I found around the web.  I 
> think missing drum-kits should be handled similarly.
> 
> 
> >>>>>
>    archive.cs.uu.nl/pub/MIDI/DOC/xg.txt
> 
> Both specs also operate a scheme of tone 'fallback', whereby if a 
> variation tone is not present at a given bank program number, then the 
> synth will fall back to using the corresponding GM tone. (the GS spec 
> does this in a cascading fashion, i.e. falling back to the next lowest 
> variation tone of the same program number....this can be confusing).
> 
> The advantage of the fallback scheme is that if a song uses variation 
> tones and is played on a synth of lesser specification (or purely GM 
> specification) then the voicing will still be acceptable (although not ideal).
> <<<<<
> 
> 
> >>>>>
>    
> cybermidi.powweb.com/faq/content/3/22/en/what_s-the-difference-between-gm-gs-and-xg.html
> 
> Although the XG format defines an extensive range of parameters and allows 
> exceptionally fine musical control, not all XG devices need to conform to the 
> full XG specification. The XG format allows features and capabilities to be 
> "scaled" according to price and target applications. When music data is 
> played on a scaled-down XG device, playback is adapted to the capabilities of 
> the device used. If, for example, a specified voice is not available for a 
> certain part, that part will be played using a similar basic voice. On the 
> other end of the scale, models equipped with a graphic equalizer can be 
> automatically set to play hard rock pieces or classic compositions with 
> appropriate overall EQ.
> <<<<<
> 
> 
> >>>>>
>    www.somascape.org/midi/help/intro.html
> 
> The voices in the extra banks align with those in the standard GM bank, thus 
> providing variants on the standard voices. This means that a MIDI file 
> composed for use with a GS or XG device will sound okay when played using a 
> standard GM device (because a GM device will ignore any Bank Select messages 
> and just respond to the Program Change messages).
> <<<<<
> 
> 
> Jimmy
> 
> 
> 
>       
> 
> 
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