This would be great for MIDI too!
Quite a few MIDI files (even professional ones) can often have many empty measures before/after the actual MIDI information which they've been exported incorrectly.
What should be a 8-16 bar loop might be over 100-bars long, mostly silence which has another side effect of making it difficult to see the MIDI information without tedious zooming as it's all small and squished in a mostly empty preview display.
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