I have a song that has its ending abruptly cut, so I tried to extend it like this:
selected a few seconds at the end (made sure to use zero crossing for the selection beginning),
moved to a new track,
time-stretched by 50% (sounded reasonable for this particular audio, it’s a simple fade),
removed the first few moments of the result while taking note of the sample count for this removed selection,
divided the number by 2 and cut that amount of samples from the original’s end,
pasted the edited part back to where it was, joined the two tracks, applied fadeout to it.
This sounds just the way I wanted it to, but then I notice this quiet but too annoying to ignore click in my left ear when playing that part back.
I switch to the spectrogram view and see this: (default window size reduced for better visibility)
I select that bit (about 200-something samples), switch back to waveform, which is in its default Linear mode, and I don’t see anything too out-of-the-ordinary.
I am convinced that the problematic part is this - as I play the track before or after it, it’s all clean, no clicking of any kind.
The thread Clicks not showing up on waveform - #8 by kozikowski relates to a similar issue but doesn’t explain what to try about it. (other than about the hardware, which doesn’t apply to me as I’m working on a pre-recorded track)
The Audacity Manual suggests three things:
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use the Repair effect. Although this states it can be used on up to 128 samples, I continue to see this warning even when my selection is way lower than that. It only works on 10-20 sample selections in my case. That’s a bit too tedious.
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apply a fadein. I don’t see where I could apply it, the waveform looks smooth enough, I have zoomed in to individual samples and scrolled along to verify that, several times.
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duplicate and crossfade the selection. I’m not sure if I get what this is about. Do I select the area with the click in the middle at zero crossings, duplicate it and crossfade, and then do the same with the right channel track so they’re the same length?
In general, are there any possible filtering/EQ suggestions to try to remedy this?
