![]() This is when I started defaulting to Change Tempo. I once had to change the speed of some audio by 10%, and found of course that Change Speed completely messed up the result by increasing the pitch considerably. However, I am reacting to past bad experience with Change Speed. Yes you are right, I can't tell a pitch change difference using Change Speed, since as you say the adjustment is so small, a few 30'ths of a second. However, if I leave that option unchecked, then Change Tempo seems to work great, producing exactly what I want, lengthening the track, with no pitch or other discernible quality effects that I can tell. Perhaps this option is the source of comments that this effect is not good? Not sure what is going on with that option. ![]() Now, I have found that the option on Change Tempo "Use high quality stretching" should be renamed "Destroy your track", since the effects are quite damaging. So, since the audio is in fact fine, and the pitch is fine, this gets us back to suggesting that Change Tempo is best, since I want zero pitch effects. Camtasia has shortened it again, and so I have to lengthen it a couple more 30'ths of a second and try again. Because when I lengthen an audio track by, say, 0.06 seconds, to approximate two thirtieths of a second for a four minute track, when I import it into Camtasia I find that. However, I have found that only trial and error will do this. The only practical solution is lengthening the audio. Since these recordings cannot practically be redone, and I am stuck with Camtasia, then I have to fix this with processing. And all Camtasia versions to the latest V 2021 have this problem. ![]() To the millisecond.įor some reason, Camtasia is shortening the audio. ![]() I imported the audio from the video into Audacity, and compared it to the audio recorded directly in Audacity. I've discovered I have what might be the worst possible case. Even if the pitch was "exactly correct" (which is unlikely), the sound is likely to be better with a "slight" change with "Change Speed" than with "Change Tempo". Changing the tempo requires ripping the audio apart and resynthesizing it, which inevitably reduces the sound quality. The "Change Tempo" effect is much more complex than "Change Speed".
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