I believe the reason midis were dropped was because they get interpreted by the sound card and are subject to the sound card's particular instrument set, so the player experience was inconsistent. For example, I have a high end sound card and my instrument set is more subtle than a lot of the basic cards, so my drod music experience with Webfoot was different from how the music was written to sound. I thought it sounded good, but some of the instruments were a bit softer than they were supposed to be compared to others, and it's hard to compose music to give the mood you want if you're not sure how it will be played at the other end.
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I was charged with conspiracy to commit jay-walking, and accessory to changing lanes without signaling after the fact
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++Adam H. Peterson