[Yesfan70]

Can someone direct me to a sight that tells you how much space an average CD will take if it is ripped in the most popular formats?

For instance lossless is considered to be 50% or 2:1 compression. I have read on some of the other boards that 320 kbps is around a 6:1 compression.

I'm interested to know how much space is used depending on the bit rate for an average CD. Maybe there is a chart on a website or that someone has put together here or something.

Thanks.

 

[mofonyx]

Is this a good enough site for you?

http://wiki.hydrogenaudio.org/index....ess_comparison

 

[Kabeer]

Not exactly what you want. But you can click the 512mb and 1gb filesizes and take the average between them, to get something equivalent to a cd.
http://www.ilounge.com/index.php/ipod/calculator/

 

[zip22]

i believe cds are 1411 kbps (anyone feel free to correct me). 320kbps would be 4.4:1. everything else is pretty easy to calculate.

 

[pentachris]

Well, since kbps stands for kilobits per second, and since there are 8 bits in a...

nevermind, here ya go since I have nothing better to do right now.

kbpsKB/minMB/min
322400.234375
644800.46875
967200.703125
1289600.9375
16012001.171875
19214401.40625
22416801.640625
25619201.875
28821602.109375
32024002.34375

 

[Yesfan70]

Thanks everyone!!!

Ok, check my math and make sure I am doing this right. Since Wav is 1411kbps, then you could probably say that is "1:1" (I know we don't say that, but I just threw that in there for reference) . Since Flac, WMA Lossless, and Apple Lossless are 2:1, then lossless would be around 750kbps or higher (roughly speaking).

So, basically you just take the format of choice and divide it by 1411, right? In this case 192 kbps would have a compression ratio of 7.35:1 compared to uncompressed audio. With that said, if you take a 80 minute CD (or 700MB) then convert that to your format of choice:

lossless gives you roughly 2-2.5 CDs for every GB of space on a hard drive (1GB or 1000MB divided by 350MB)

192 gives you about 10.5 CDs for every 1GB of space on a hard drive.

I plan on ripping all of my music to my PC. I think a 750GB drive would do for lossless, but I was just curious to know how much the 60GB drive in my ZVW would hold in the various lossy formats.

I used the 700MB/80min number just to be conservative. This way I know I would be covered. I have a 160GB drive now and have been average about 3 CDs per GB (or 330MB in lossless for each album).

 

[werdwerdus]

fwiw all my flacs together average 935 kbps (less than 5% are higher rez than Redbook)

I would say lossless is more towards 60-70% of the uncompressed file size, not 50%. But I also have some lossless that averages around 300 kbps for a whole cd!

 

[pentachris]

Quote:

Originally Posted by Yesfan70 /img/forum/go_quote.gif I was just curious to know how much the 60GB drive in my ZVW would hold in the various lossy formats.

Due to the difference in what HD mfgrs call a GB and what computers call a GB, as well as the formatting overhead and firmware, you can probably only actually get about 55 GB (roughly) worth of music on the player. At 1024 MB per GB, that's 56,320 MB.

128 kbps is easy to work with because it codes at just under 1 MB per minute. Add in file headers, ID3 tags, etc. and call it right at 1 MB per minute. So, 56,320 minutes of music.

256 kbps would be half that, or 28,160 minutes. 192 kbps would be right in between the two at 42,240 minutes. 320 kbps yields 22,528 minutes.

 

[Jubei]

It also depends on whether you're using CBR or VBR and what type of music were talking about here. With VBR, if your music is either simple or of the historical nature (i.e. mono and/or old), the bitrate can drop quite significantly even if you have it set at moderate levels.

With EAC set to rip at Lame v2, one of my Billie Holiday discs ended up averaging around 133 kbps (displayed in foobar properties dialog box), disc duration was 48 minutes, totalling 48MB.