WAV Crackling

greenjinjo · Post by **greenjinjo** » Sun Dec 12, 2004 4:22 am

Hey,

I'm using WAVs from a game file, and the sounds sound fine when played in Winamp or even in Premiere, but when I export the video with the sounds they sound a bit crackly/static-ish.

Any ideas on how I can fix this, or am I not giving enough info?

Thanks!

Scintilla · Post by **Scintilla** » Sun Dec 12, 2004 10:08 am

Are the sample rate and bit depth the same on the export as that of the source?
Did you bump up the volume?

greenjinjo · Post by **greenjinjo** » Sun Dec 12, 2004 10:18 am

Ah good point

I have some of the WAV audio at 44.1 kHz, 16-bit mono, some of the audio at 11.0 kHz, 8-bit mono, and some at 44.1 kHz, 16-bit stereo. I'm exporting at 44.1 kHz, 16-bit stereo. Stragely, the ones that sound the worst are the ones already in 44.1 kHz, 16-bit stereo.

As for volume, a few had their gains increased, some decreased, but again, strangely, the ones that sound the worst are the ones I lowered.

post-it · Post by **post-it** » Sun Dec 12, 2004 10:37 am

are you exporting these wav's as PCM Windows audio or ACM wav's ?

you might want to check your exporting WAV setting and switch to PCM.

- this almost sounds like you need newer Audio Card Drivers for Direct Sound!

Scintilla · Post by **Scintilla** » Sun Dec 12, 2004 10:38 am

Um... are the project settings the same as the export settings?

*casts an unkind look at the trailer project in his sig*

greenjinjo · Post by **greenjinjo** » Sun Dec 12, 2004 11:12 am

post-it wrote:

are you exporting these wav's as PCM Windows audio or ACM wav's ?

you might want to check your exporting WAV setting and switch to PCM.

- this almost sounds like you need newer Audio Card Drivers for Direct Sound!

Hmm, sorry for this n00bish response

but I'm not really sure what I'm exporting in besides the fact that "Uncompressed" is chosen from the drop down, and there is an option here Microsoft ADPCM. Is this what you are referring to?

@ Scintilla: Have a bad experience did we?

Yes, so far as I can tell the project and export settings are the same.

AMVfreak · Post by **AMVfreak** » Sun Dec 12, 2004 11:31 am

Are you audio gaining in Premiere?
I've had cracklings problems in the audio in the export when it was gained too much.

I suggest doing all the audio adjustments in an audio editing program and then importing the finished into Premiere.

post-it · Post by **post-it** » Sun Dec 12, 2004 11:51 am

... no no no no! ....

FYI - Microsoft ADPCM is a 4-bit DOS Audio from the Windows 3.10 days.
( Microsoft ADPCM was used along with the VFW1.1e codec's - 1993 )

<a href="http://www.xentec.be/products/vox_studi ... ]Microsoft ADPCM[/b]</a>
Sound is encoded as a succession of 4-bit nibbles. Each nibble represents the difference between the current sampled signal value and the previous value. The compression ratio obtained is relatively modest: 16-bit data samples encoded as 4-bit differences result in 4:1 compression format.

.. see if you can find something that looks like "PCM Windows" or just straight "WAV"

- this is not your fault in any way, shape, or form - it is an old-old standard.

post-it · Post by **post-it** » Sun Dec 12, 2004 12:13 pm

*** found it ^_^

http://www.creativecow.net/articles/gor ... index.html

greenjinjo · Post by **greenjinjo** » Sun Dec 12, 2004 12:27 pm

The one I've been using is Windows Waveform, is this the closest to what you think I should be using?

BTW, thanks so much for your helping out this n00b