Reply
 
Thread Tools Display Modes
  #1  
Old 04-02-2012, 12:36 PM
Legion303's Avatar
Legion303 Legion303 is offline
Steve Pordon
Ghaleon (+2250)
OC ReMix Artist Profile
 
Join Date: Jan 2002
Location: Denver
Pop in wav file, not visible in waveform

This is very strange. I recorded a bass through my soundcard and it came out fine, except at various places in the recording there are pops like the ones you hear when your CPU is lagging. But when I open the file in a wave editor, I can zoom to the sample level and find no spikes or discontinuity at all. This is a very pure waveform, so any problems should be easy to spot.

I cut out one of the suspect areas and saved it to a new file, and the pop is still there, and still no evidence that there should be one. Does anyone know what could be happening?
Reply With Quote
Sponsored Links

Please join us the next two weeks supporting our sponsor, Theatrhythm Final Fantasy Curtain Call™!!
  #2  
Old 04-02-2012, 03:02 PM
Metal Man's Avatar
Metal Man Metal Man is offline
F. Petitpas
Akuma (+1100)
 
Join Date: Mar 2006
Location: Saguenay (QC)
Turn off software monitoring; turn on direct monitoring if you soundcard allows it.
Or raise your buffer a little ?
__________________
Exutus (Album preview)
Reply With Quote
  #3  
Old 04-02-2012, 09:53 PM
Legion303's Avatar
Legion303 Legion303 is offline
Steve Pordon
Ghaleon (+2250)
OC ReMix Artist Profile
 
Join Date: Jan 2002
Location: Denver
But none of that is the issue.
Reply With Quote
  #4  
Old 04-02-2012, 09:56 PM
PROTO·DOME's Avatar
PROTO·DOME PROTO·DOME is offline
Blake Troise
Tanooki Mario (+1500)
OC ReMix Artist Profile
 
Join Date: Aug 2008
Location: England
This is absolutely no help at all, but I used to have this way back with high quality MP3s on my old PC.
__________________

Reply With Quote
  #5  
Old 04-03-2012, 03:12 AM
Moseph's Avatar
Moseph Moseph is offline
Peter M. Crockett
Luigi (+2000)
OC ReMix Artist Profile
 
Join Date: Jun 2006
Location: Saint Louis, MO
I don't know that this helps at all, but I have on occasion zoomed in to sample level to try and fix pops that I could see in the waveform, and the pops remain even after the waveform has been smoothed. So it goes both ways, at least.
__________________
Reply With Quote
  #6  
Old 04-03-2012, 05:48 AM
Ivan Hakštok's Avatar
Ivan Hakštok Ivan Hakštok is offline
Futebol Arte Director
Bad Dude (+500)
OC ReMix Artist Profile
 
Join Date: Jan 2011
Location: Ston, Croatia
I had a similar issue - for some reasons audio drivers were conflicting with my bluetooth and wireless drivers. Try disabling those if you have them.
Reply With Quote
  #7  
Old 04-03-2012, 02:34 PM
Legion303's Avatar
Legion303 Legion303 is offline
Steve Pordon
Ghaleon (+2250)
OC ReMix Artist Profile
 
Join Date: Jan 2002
Location: Denver
I need to explain this a little better than I did. The problem isn't sound card latency or any of that--I re-recorded the part and it was fine. The problem is that I'm looking at a smooth wave form that has inexplicable noise in it which can't be seen. I snipped out part of the file and listened to it on another computer, ruling out hardware issues.

I think Moseph hit it on the head. For whatever reason, some sound artifacts can't be seen even at the sample level. I'm just curious as to why this is.
Reply With Quote
  #8  
Old 04-03-2012, 10:07 PM
Nutritious's Avatar
Nutritious Nutritious is offline
Justin M, Judge, Portrait of a Plumber Director
Ryu (+1750)
OC ReMix Artist Profile
 
Join Date: Aug 2006
Location: Norcal
An example sound clip may help
__________________
Current Projects: SD3
Released Projects: BC Boss Wild Arms FF4 Super Metroid Tales Xenogears DKC2 FF5 Mario 64
Reply With Quote
  #9  
Old 04-05-2012, 08:14 AM
Legion303's Avatar
Legion303 Legion303 is offline
Steve Pordon
Ghaleon (+2250)
OC ReMix Artist Profile
 
Join Date: Jan 2002
Location: Denver
http://neutronstar.org/tmp/audiosample.wav
Reply With Quote
  #10  
Old 04-05-2012, 08:43 AM
Ivan Hakštok's Avatar
Ivan Hakštok Ivan Hakštok is offline
Futebol Arte Director
Bad Dude (+500)
OC ReMix Artist Profile
 
Join Date: Jan 2011
Location: Ston, Croatia
Don't know how you didn't see it, but there's certain stutter in the wave file, visible on the screenshot here:

http://i41.tinypic.com/13zzbbk.png

Clicks don't necessarily have to be huge bumps - in this case the wave with the jump goes through Fourier transform, and jumps like this one generate higher frequencies, aka the click.

Here's the spectrum of the same section:

http://i44.tinypic.com/u1slx.png
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 07:57 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.