[Audacity-quality] Importing 16-bit AUP project into 3.0.0 set to 32-bit

[Bill W. <bi...@go...>]

I tried this on Mac 10.15.7 and Audacity 3.0.0

Start 2.4.2
Set Quality prefs to 16-bit
Import some audio
- note that the track is labeled as 16-bit
Save the project
Quit 2.4.2
note the _data folder size

Start 3.0.0
Set Quality prefs to 32-bit float
Import the previously saved 2.4.2 project
- note that the track is labeled as 32-bit
Save the project
- note the project size - same as the 2.4.2 project but shouldn't it be twice as big?
Amplify the track by 20 dB
- since the track is 32-bit float, this should be recoverable
Amplify the track by -20 dB
- note that the track is not recovered - it appears that it is 16-bit even though labeled as 32-bit

Importing 16-bit audio files into a 3.0.0 project with Quality prefs set to 32-bit properly converts the audio to 32-bit (I tried MP3 and AIF). So this appears to be an issue only when importing AUP projects.

— Bill