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boosting volume a couple of times (quality loss) ?
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bomber07
Suspended due to non-functional email address
_ 		9. October 2009 @ 08:52 _ Link to this message    Send private message to this user   
Hello guys,

Just wondering is there going to be any type of audible quality loss if I boost the volume of a CD for a 2nd time ?
I boosted the volume by a few db months ago using Adobe Audition 1.5.
I no longer have the original low volume CD (I only kept the CD with the volume raised).
I would now like to boost the volume to peak at -.01 db (so no clipping), which would be boosting by a few more db.
Is it tecnically going to cause any type of audible quality loss (like adding hiss or anything) by boosting the volume for a 2nd time using Adobe Audition 1.5 ?

Thanks
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djscoop
AfterDawn Addict
_ 		10. October 2009 @ 05:51 _ Link to this message    Send private message to this user   
what is the source file. did you rip a CD to your computer in an uncompressed wave format? or is the source file a media file like an mp3? if you ripped the audio file from a CD, and its in wave format, then you shouldn't have a problem increasing the volume, but whatever background distortion (hiss) will be amplified as well. if this is an mp3, there will be major quality loss because you will have to decode and recode a lossy format.
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"I have no particular talent. I am merely inquisitive" - Albert Einstein

For the best quality mp3s use EAC (exact audio copy) to rip your audio CDs and LAME to encode them. Follow this guide:
http://www.afterdawn.com/guides/archive/mydeneaclame.cfm
Mez
AfterDawn Addict
_ 		12. October 2009 @ 09:41 _ Link to this message    Send private message to this user   
I do not think you should have any problem increasing the volumn that way. Your distortion comes from your hardware playing too loud not your software. In other words making the Normalization does not alter the audio portion of your mp3.

I have not played with normalization yet. That will be my last step in a very long process. It is preferred to do your entire library at one time. However, I do keep current on the tecnnology.

Instead of 'playing' with your audios, you really want to standardize them to a prefered absolute loudness. You made a mistake when you ripped the CD and set a wrong loudness setting. Correcting a mistake will not effect distortion. I also suggest you learn by cracking a book instead of experimenting.

This is detailed info about normilization and a tool (Replaygain) used by picky listeners.
http://replaygain.hydrogenaudio.org/contents.html

You experiment with a few CDs then do your complete library at one time. You need to check to make sure your player will use the normalization information since the audio portion is not touched. The info is stored in the tag data. Most players use normalization data.
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undine
Member
_ 		12. October 2009 @ 15:14 _ Link to this message    Send private message to this user   
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