Hi,
I’m trying to help my daughter with a school project demonstrating the Doppler effect. We recorded a sample of a constant pitch zooming toward the microphone then away on a bicycle. Now we want to view the pitch over time. I thought it would be easy to get some piece of software to show us pitch on the Y axis and time on the X axis, but I haven’t been able to figure it out.
Can Audacity do this? I’ve been playing around with it for a while and haven’t gotten there yet.
Thanks very much.
(Mac OS 10.15)
There’s a drop-down menu to the left of your sound track. Select Spectrogram view.
It’s Time left to right and Pitch or Frequency top to bottom. Detail increases as you stretch the track taller.
Koz
Thanks a lot. I had actually gotten that far, but misunderstood the spectrogram. I thought it was showing me VOLUME information (since the sound happens to increase in volume as the pitch rises), but of course if I had paid more attention to the axis labels I would have seen that it’s pitch.
Thanks again.
We recorded a sample of a constant pitch zooming toward the microphone then away on a bicycle.
A car horn at a higher speed will be more dramatic, if you can find a “good place” to do that… A car horn is not a single-pure tone but it does have pitch.
Now we want to view the pitch over time.
Like a lot of things audio/sound related, it’s easier to hear than to see! 
You could use [u]Analyze → Plot Spectrum[/u] but you loose the time variable so you’d have to look at 2 (or more) “snapshots”.