Playback speed drifts faster and slower

• Feb 19, 2012 - 00:08

I converted a midi file which generated 5 clefs.

In order to play along, I added a 4 measure
lead-in for one of the instruments to set the tempo.

The lead-in plays faster than the rest of the song. As soon
as it hits all the instruments (even if they are muted) the
tempo slows.

To duplicate, open the attachment, and mute all instruments
except for the 3rd clef (it has the lead in), then start playback.

Win7x64
V 1.1 build 4611
8gb memory
quad core 1-5 chip

Attachment Size
Cherokee_Shuffle.mscz 22.34 KB

Comments

In reply to by musiclover007

I don't see where the original tempo was ever set. I have no idea how the system decided to use the tempo it did.
If I leave the Play Panel open, it doesn't change from 120 bpm to something slower after the lead-in.

I notice that different demo files playback at different tempos (what bpm established as 100%), but
I don't see the number appear anywhere on the sheet. For example, if I select the Brandenburg Concerto,
the "Play panel" shows 90 bpm as 100%. Where did that come from?

If I open Planxty Carolan from the demo directory, the tempo word it shows is "Allegro", When you open the Play Panel it
shows 120 bpm. But if you open the Create>Text>Tempo and select Allegro, it shows 132, not 120, I don't understand where the 120 bpm is stored.

In reply to by ChurchOrganist

If the score had been created from within MuseScore, then a null tempo string would be the natural assumption. But since it came from a MIDI import, I'm guessing the MIDI file itself contained an indication of tempo that MuseScore is honoring. When you add measures *before* the beginning of the piece, MuseScore probably just goes back to its default of 120. I think it might work better to add the measures after the first bar, then copy the contents of the first bar afterwards. Or just edit the MIDI file directly to add four bars of silence first, then you could place your intro there.

In reply to by Marc Sabatella

@Marc Thanks. I put the .mid file into Anvil Studio (freeware version). I added 4 measures at the beginning. Saving in Anvil Studio set the tempo at one rate from the beginning. When imported, the new file does not change speeds in MuseScore, and Play Panel shows the bpm that I set in Anvil as the 100% setting.

That program also fixed some other oddities in the original file (time signature of first measure was different than rest of piece).

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