Muffled audio on a recording

vbimport

#1

Hi,

I recently conducted an interview for my dissertation, The interview was done over the phone and I recorded it on my laptop, thorugh the standard recorder, but when I went to play it back through windows media player I can hear myself perfectly but the interviewee is muffled, I was just wondering if there was any software I could download to help this?

This is getting quite urgent as it is due in two weeks and I need to write it all up, which is difficult if I can’t hear it!

Thanks


#2

You might want to try Audacity to increase the sound only on those sections where your muffled sound occurs. Audacity is a free audio editing program.

Import the audio, then use the Selection tool to set the start and end points of the low volume area. Then click Effect–>Amplify and see if the result is acceptable. You’ll have to do this for every section you want more volume. You may also have to allow clipping and you can preview the effect to find the right amount of volume increase.

What format is the audio in? If it is mp3, you will need the Lame library as well as the program itself. I’d use the 1.3.12 beta version of Audacity: http://audacity.sourceforge.net/

and the Lame library is here: http://lame.buanzo.com.ar/

It won’t hurt to install the ffmpeg library as well: http://manual.audacityteam.org/index.php?title=FAQ:Installation_and_Plug-Ins#installffmpeg


#3

[QUOTE=Kerry56;2581523]You might want to try Audacity to increase the sound only on those sections where your muffled sound occurs. Audacity is a free audio editing program.

Import the audio, then use the Selection tool to set the start and end points of the low volume area. Then click Effect–>Amplify and see if the result is acceptable. You’ll have to do this for every section you want more volume. You may also have to allow clipping and you can preview the effect to find the right amount of volume increase.

What format is the audio in? If it is mp3, you will need the Lame library as well as the program itself. I’d use the 1.3.12 beta version of Audacity: http://audacity.sourceforge.net/

and the Lame library is here: http://lame.buanzo.com.ar/

It won’t hurt to install the ffmpeg library as well: http://manual.audacityteam.org/index.php?title=FAQ:Installation_and_Plug-Ins#installffmpeg[/QUOTE]

Hi, thanks for the information! I’m at the uni library just now so will try that when I get home on my laptop…The file is a WMA…do I need a different version for that?

Cheers

Steve


#4

WMA support has been added to the beta version of Audacity, but you will absolutely need the ffmpeg library for that format.

I’ve never tried .wma files in Audacity (audio is not my specialty), but it won’t hurt to try this since everything is free.

Good luck and let us know if this didn’t work for you.


#5

I tested Audacity for this on the quite parts of a song. It worked as Kerry56’s instructions said. I first had to convert a .mp3 to .wma with dBpowerAmp .
I have Skype & a D-Link DPH-50U . The D-Link monitor software has always done a good quality recording of both sides of the conversation .If that might help you if you do this kind of recording frequently.