Automate specific tasks

[pathfinder73]

Those values appear at the top of the window when I select the track and click Effects → Change Pitch.

The “Change Pitch” effect only provides an approximation of the frequency. It’s not very accurate for low frequencies.

Better accuracy can be achieved with “Plot Spectrum” (Plot Spectrum - Audacity Manual)
The larger the “Size” setting, the more accurate it is, but accuracy at low frequencies is still not fantastic. If you start with a higher frequency (say 1000Hz) it is much easier to verify that the code is working correctly.

Now I used a file with more than 1000 Hz…
Audacity generates a report in that menu you indicated (Plot Spectrum). I generated, tabulated the information in Excel and compared. In my non-audio expert’s eye, I didn’t spot the 15% pitch increase, but rather that from track to track the decibels in each range on average decreased in value. That’s right?
By these values, can you identify the 15% pitch increase?
You are right, Steve. Track 1 and track 7 are really equal.

https://docs.google.com/spreadsheets/d/1jE5gYOzPbPYVOO71Ts-c4aakGqIQz6Lj/edit?usp=sharing&ouid=110183996406454529180&rtpof=true&sd=true

[steve]

Plot Spectrum with all 7 tracks selected.
Observe the 6 spikes (one per track)
Observe that the first spike is bigger than the others (because it is the sum of the first and last tracks)

[steve]

Same thing but with SBSMS enabled.
Observe that there is less “noise” than in the SoundTouch version:

[pathfinder73]

Thanks for all, Steve.

I will use your routine for manipulate my n-tracks…

God bless you!