Audacity Forum

I'm going to be using audacity with a homemade infrared phototransistor ballistics chronograph similar to the one here.

The first useful plug-in I'd like is one that, when audacity displays the length in time of a selection, would also display a converted value in fps given that the physical distance of the time elapsed is 1 foot.

The second, and probably much more unrealistic, is one that would find the peaks in any given selection, and then find the time elapsed between them and use that to find the fps. Even a function that would simply find the peak and select it would be useful.

Any and all help is appreciated. Also, my apologies if this is the wrong section of the forums.

You can simulate that.

Apply Edit > Select > All and then Effect > Amplify with the default values. That will make the capture really tall so you an see what you're doing.

Zoom in to each abrupt transition (select the area and Control-E) and set a label. Control-B I think. Zoom back out full Control-F. Repeat with the other transition.

The labels become sticky or magnetic and you can select them while zoomed out full. Once you select the portion, one of the timing windows below the timeline will tell you the duration -- accuracy depending completely on your sound card. If your sound card sucks, so will the readings.

The forum is full of people trying to sing songs with themselves. The two performances meant to overlap for three minutes don't, sometimes by an eighth to a quarter of a second. You put that sound card in the bin.

Precision scientific measurements fail in the oddest places.

Koz