I play guitar mostly, and therefore I mute the guitar tracks and vocals of course. If in addition the file is clustered with instruments I try to strip them down to the bear necessities, drums, bass and piano/organ. This gives you a "live" setting and you become number four in the band. I know that many here despies the use of midifiles and put it in the karaoke category, but I feel as long as you play your instrument and have some chops that work with your songs or even sound like the real thing, you have some credibility after all.
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Roy-Andrč
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Roy-Andrč