audio decoding noise & others

[Dogway]

Hello, Im having problems with audio, in certain files I could say but not sure.
I dont know how to describe the noise it makes in English so please download the WAV sample below. In this case it was just the audio of a 720 video on youtube (http://www.youtube.com/watch?v=oqVGN2MIifs), but happens as well on random video playback on MPC-HC.

1Mb sendspace:
http://www.sendspace.com/file/92l1xx

Im decoding through ffdshow
mp3->libavcodec
aac->libfaad2
ac3->lib52

Since I could record the noise I think I can discard the speakers (?)


-A fast question about encoding DPLII, is it ok mp3 192kbps stereo in ABR?

-My laptop is only stereo, but my Realtek HD audio driver has a DPLII decoder option, do you recommend me that over the ffdshow Dolby Decoder?

[yetanotherid]

The crackle (I assume that's what you're referring to) seems to be caused by gaps in the audio.

http://i10.photobucket.com/albums/a142/dashpb1/badsound.gif?t=1298185638

How are you recording them? Does this also happen when you playback audio you didn't record yourself?

Why it's happening, I don't know. I'll have to think about that one, or maybe leave it up to someone who's more clever than I am.

Edit: One thought. Are you using any ffdshow filters/effects such as the equaliser etc?
Try enabling MPC-HC's internal filters for those audio types (so you're not decoding with ffdshow) to see if the problem goes away.

[yetanotherid]

Looking at the waveform the audio seems to have briefly stopped and started rather than skipped a bit. If you edit out the gaps the waveform doesn't look like it'd have anything missing. So it'd appear you're getting tiny pauses during playback which you recorded, pause and all. I still don't know why....

[Dogway]

I dont have anything checked on ffdshow audio, only Dolby Decoder which I disabled, but still the same.
Right now I also disabled Audio Switcher on MPC-HC, but it persists.

I downloaded the youtube clip and checking audio in audacity, no gaps, it also plays the sound smoothly in MPC-HC so I think it might be a problem of adobe flash(?)


I checked another clip audio with this same phenomena and this time it was the clip itself, please check here (http://www.lookfx.com) (dont watch it if you dont want to spoil yourself)
at this time:
1.35.326ms

(offtopic: funny they used x264 : D)

It sometimes happens playing mp3 on winamp too.