Automatic beat detection: detects wrong tempo for generated rhythm track.

[DavidBailes]

Bug description

No response

Steps to reproduce

1. Generate a rhythm track with tempo 60, beats per bar 4, and number of bars 8.
2. Export to a wav file.
3. Set the music imports option to ask me each time.
4. In a new project, import the file.

Expected behavior

A music import dialog, saying that file had been detected to be 60 bpm

Actual behavior

Detected 90bpm:

Audacity Version

other

Operating system

Windows

Additional context

version release-3.5.0

[DavidBailes]

Did some further tests, keeping beats per bar at 4, and number of bars 8. The incorrect tempo seems to be detected if the tempo of the generated rhythm track is 72 bpm or below.
@saintmatthieu . Is this behaviour expected, or is it a bug?