Ram preview audio glitch after 56 seconds

[Liam_Wiebe]

Hello

I've been working on a lyric video fro the past while (as a personal project) and I've noticed a strange audio glitch at 56 seconds. I song plays perfectly beforehand but after 56 seconds it sounds corrupted.

It sounds as if the song has been layered on itself several times and those extra layers are short and repeat themselves constantly. It sounds rather eerie.

-I tried a couple of things, I tried listening to the song just by itself (not in after effects) and it played perfectly throughout the whole song.

-I tried doing a playback of the song in Premiere, worked perfectly

-I tried moving the song file back in the comp (in after effects) to see if it was the file or after effects, and no matter what part of the song was at that spot, it always sounded corrupted at 56 seconds

This confuses me and also gets in the way of my project, I could find ways to improvise (since it works in Premiere) but I'd rather know whats going on and how to fix it.

any suggestions?

Thanks.

[Horshack]

Did you make sure that AE rendered that portion by playing it through first and then replaying it? Otherwise if there are effects on the other layers which reduce the preview rate below the composition's nominal frame rate then AE will ramp the audio playback up/down as it sputters through the render.

[Liam_Wiebe]

Thanks for responding so quickly, I will check it and get back to you later

[Liam_Wiebe]

It was fully rendered in the preview. I have my audio set to only play when it's going at full time. Besides that I'll have to look into it again and get back to you

[Rick Gerard]

When you find a problem that you suspect may be with a setting or an effect select the layers involved and press the u key twice to reveal all modified properties. Then start isolating things like effects and settings by turning them off to see where the problem lies.

Probably the first thing I would do would be to set the work area to start about one second before the problem and end one second after the problem, purge everything and run a ram preview. If it's good then you either have a memory or cache problem caused by something in the timeline. It could even be the original audio track if it is not a standard video format like 16 bit 49 KHA PCM WAV. MP3 and other compressed audio formats are notorious for causing problems.