BPM detected count-in

Thanks for your app, really helping me to learn songs.
I had an idea the other day: count-ins.
When I want to start at the very beginning of a song,
for example if I want to shoot a video,
I have to «manually» add a count-in with, say, Audacity.
This is tedious, even for one song, let alone several ones.
What about integrating this feature to Music Speed Changer?
I imagined a workflow
- the app could try to detect the BPM and «the one» of the song,
- play beeps before starting the song,
- if speed is changed, beep accordingly,
- the user could set the number of beeps, adjust BPM and offset if needed,
- the app could remember beep number, BPM and offset for every song,
based for example on the filepath.