Convert Flac to Wav - how to & HD space need?



Hi

Have all my CDs ripped to FLAC, and want to convert them to uncompressed WAV files.

I currently have 1100 CDs, using up 308 GBs(In FLAC).

Which software do you recommend to convert to WAV?
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How much more space will I need on my HD?

Thanks
saffy
I use a program called Max on an iMac to do the convertion. Max can convert between 30 some different audio formats. It works really well especially for its price - free.

WAV file generally requires about 2.5 times as much space as FLAC.
Lossless compression does not affect quality at all. If it somehow does, something is really wrong with your computer and/or the program used to play the files. It really is a storage-based compression, used to minimize disk space only. When you play such a file on your computer, the file will be decompressed to raw PCM before playback, in real time. So, both in theory and practice, playing back a losslessly compressed file or a WAV file is absolutely identical. There is no jitter involved here either, since when the data is fed to the soundcard/DAC it is already raw PCM in both cases. Jitter may happen from the buffer (in the case of a computer, this will be RAM) where the PCM is stored to the final destination of the data, the DAC. This applies to all compression methods, including MP3, Real Audio or whatever you can think of. At the time of playback, the data is raw PCM. But of course, for lossy compression methods, the damage is done when encoding the files, I'm just telling it as an example.

Saffy, there are several CD burning apps that will burn FLAC files directly to disc (it decompresses them automatically when burning), so there's no need to decompress them manually first. :) I use Roxio Toast on my Mac, but there are many others I'm sure. Nero works well in Windows for instance.

Kenl, if you want to decompress Apple Lossless, just use iTunes. The same argument as above applies though - there is no way a losslessly compressed file can sound different than a WAV file, unless something is seriously wrong with the application that plays it.
Osgorth - first thanks

Are you sure there is nothing that could effect the sound going from a compressed file to CD-r VS uncompressed?

This Guy: www.genesisloudspeakers.com/wh...is recommending uncompressed after two years of research.
Saffy, yeah, if the end result is not identical, then the software used is doing something very wrong indeed (i.e. corrupting the data when decompressing it). The process is the same as playing the files, e.g. before burning the burning application has to decompress the files into memory. So when the actual burning takes place it reads uncompressed PCM from memory and puts it on disc.

I think the confusion comes from the idea that the file is "compressed". It sounds bad, we don't want compression do we.. But, a losslessly compressed file is only compressed while stored on your hard drive. As soon as you want to DO something with it, like playing it or burning it to CD, the file must first be decompressed to its original raw PCM form. And, all lossless compression algorithms have been verified numerous times; they indeed reproduce a bit-for-bit copy of the original PCM data. This is in contrast to the popular "lossy" algorithms like MP3, WMA, AAC and countless others, which apply psychoacoustic models to the music and permanently removes "redundant" information. These files are certainly not identical to the original, and there is no way to reproduce the original bitstream but rather an approximation. When people talk bad about compression, this is often what they're talking about, and that I totally agree with! :) Lossless compression however, is just what it says: it loses nothing.

I had a look at the Genesis web site but couldn't find anything related to compression there. Do you have a direct link to where he talks about this? It would be interesting to see. :)