[vorbis] fitting lots of music into 10GB with Vorbis

[R]

Hey Martin,

I thought, let's use maths! :-)
At the top of your playlist, there's written:

"Playlist length: 55 hours 24 minutes 31 seconds"

Let's convert that into minutes at first, which gives us 55*60+25=3325 minutes. 
Now, we should convert that again, this time into seconds: 3325*60=199500 
seconds.

Okay, now let's take a look at your disk size. Your crappy disk (that were your 
words ;)) is about 10 GB large. Let's say Windows and some other programs will 
cost you approx. 800 megs of space. That means 9200 megs are left over for 
audio. We should convert that into bits. Bits? Yeah, bits! Here we go: 9200*
1000000=9200000000 bytes. We'll need to multiply that by 8 to get the amount 
of bits available on your disk, so 9200000000*8=73600000000.

So, for 199500 seconds of sound, you'll have 73600000000 bits available. So 
how many bits would you have available for one second? Let's see: 
73600000000/199500= approx. 368922 bits per second.  Now we'll convert 
that into kilobits, so divided by 1000, we'll get the end value of 368,922.

Theoratically speaking, if you would use that bitrate, all your audio should fit on 
your harddrive perfectly. However, Vorbis uses VBR, so you can't really stay 
very close around that bitrate. Therefore, I think, your average should be under 
this value. 

A value of 0.80 in the Vorbis codec will provide you with a nominal bitrate of 
256 kbit, and the avarage bitrate perhaps approaching or even exeeding the 300 
kbit boundary. However, you'll defenitely stay under the 368 kbit.

Since Vorbis usually sounds a lot better than mp3, you shouldn't be worried 
about ogg-files with a bitrate above 250 kbit. It should work very well with your 
PA set. Here, in Dutch broadcasting, we use 256 kbit MPEG Layer 2 as audio 
compression method, so your ogg-files will sound perfectly fine. :-)

I hope I've helped you out here Martin. Let me know if this was any usable!

<p><p>Regards,

Rachid.nl

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