But we are talking about un-tweaked SMFs here apparently.......... plenty of you feel that re-working the header is too much work.
Just ONE SMF is hardly a fair comparison - the sax that sounds good in one song may not work well in another, and presumable, we are talking about GM playback, not GS or XG, so, although you may have a dozen different saxes in your keyboard, if the SMF calls up a tenor, that's it......... no choice of 'breathy' tenor, or 'growl' tenor or whatever. One tenor, one alto, one bari........ that's all GM allows for. The tenor may work in a R&R piece and suck in a jazz setting.
THIS is why the ability to QUICKLY change the header information is essential, or you might as well use an old SC-55 (which is probably what 80% of the SMFs out there were written for).
All this running around in circles, trying to find something that does as good a job as a cheap Roland module....... LOL
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An arranger is just a tool. What matters is what you build with it..!