Ritardandos and Accelerandos always consist of 4 evenly spaced abrupt tempo changes

• Dec 22, 2022 - 17:54
Reported version
4.0
Type
Functional
Frequency
Few
Severity
S4 - Minor
Reproducibility
Always
Status
active
Regression
No
Workaround
Yes
Project
MuseScore

I am not sure what would be the exact steps to consistently reproduce this, but what I did was:

  1. Select almost 30 bars of music (written in 5/8 and tempo quarter=65)
  2. Add accelerando tempo marking to them
  3. Set accelerando playback tempo change to 200%, without changing the default "smoothing method" (if that's the English name of that lol)

Expected result:
The playback tempo changes many times to make the transition feel reasonably smooth over this many bars. Also the accelerando is already noticeable after the first 1-2 bars.

Actual result:
There's only a few tempo changes, they are very abrupt, and for over 7 bars the tempo doesn't change at all.

The exact observed playback tempo, as per top right corner info:
- 7 + 2/5 (!) bars played in the base tempo = 65
- 3/5 + 7 + 3/5 (?!?!?) bars played in tempo = 81
- 2/5 + 6 + 3/5 bars played in tempo = 97
- 2/5 + 7 bars played in tempo = 114.

Attachment Size
Angels_Egg_-_Prelude1.mscz 36.79 KB

Comments

• Dec 22, 2022 - 20:24
Title Abrupt tempo changes in playback of accelerando spreading over many bars ⇒ Ritardandos and Accelerandos always consist of 4 evenly spaced abrupt tempo changes

I can reproduce this. It seems that any gradual tempo change actually consists of four abrupt tempo changes, which drastically reduces the usefulness of the gradual tempo changes. It's a lot easier to show when youp up the tempo percent change to 400%. Attached is an example score that demonstrates this.

Note that the "Easing Method" setting only adjusts what each of the four tempo changes are.

Attachment Size
Tempo Change Abrupt.mscz 32.24 KB

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