> On Oct 2, 2015, at 8:42 AM, Bill Spencer <[email protected]> wrote:
> 
> Hi there: I'm considering transferring all my commercial audio CDs to HD 
> storage, and wonder if there's a rule of thumb about how many CDs would fit 
> onto a drive of X capacity. For example, if I had say 100 CDs that each 
> included 70 minutes of music, how big would the HD need to be to accommodate 
> all those CDs (encoded in a lossless format)? 

It depends on the format.

If you rip a 650 MB CD to a .wav or .aiff format you use 650 MB or a little 
more depending on the format overhead; they perform no compression at all.

Using FLAC or ALAC (Apple Lossless), you can get 50% or better compression of 
the file, depending on the music, at the cost of considerable time spent 
ripping the CDs. Both are akin to .zip files, in that they do lossless 
compression.


-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs

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