Audacity Forum

I have hours of recordings to scroll through in spectrogram mode to watch for quick sounds (less than a second). Currently I am just zooming in so that about 8 seconds of audio is displayed, and then hitting the pagedown key to scroll through. Is there another way to do this that doesn't involved hitting the key 3000+ times per recording? If I hold the key down, it scrolls by way too fast.

Try the Play-at-Speed Toolbar (which now adjusts speed dynamically during playback).

See: https://manual.audacityteam.org/man/pla ... olbar.html

WC

Thanks, I did look at that feature, but it only goes up to 3x, which isn't fast enough. I don't actually need to hear the audio, just look at the spectrogram.

I did figure out that I can use another program AutoHotKey with a script to press the pagedown key for me about 5 times per second (see below). I just press F12 to start scrolling, then F12 again to stop scrolling.

The ideal would be if the display would smoothly scroll to the right, rather than jump from one section to the next. Is that possible?

#MaxThreadsPerHotkey 2
F12::
toggle:=!toggle
While toggle{
Send {PgDn}
Sleep 250
}
Return

brian0918 wrote: ↑

Thu Mar 19, 2020 11:45 am

I have hours of recordings to scroll through in spectrogram mode to watch for quick sounds (less than a second).

What is the purpose of this? What is the recording?
(The reason that this matters is that there are ways to get fast playback, but they may modify the sound in some way. Without knowing what you are doing, I can't know if any of the possible solutions will be suitable)

Hi Steve. Is there any way to slow the scrolling down to really slow, slow enough to pinpoint the location of a bit of noise in the track?

If you have a mouse with a mouse wheel, then you can start "scrubbing" playback, and rotate the mouse wheel to change the play speed. The slowest supported speed is x0.01 (100 times slower). https://manual.audacityteam.org/man/scr ... eking.html

No way to do that with touch pad only?

OK. I'm starting to get the hang of it. I can do it with the touch pad. WOOT!