[calvinhobs]

Just want to know how many songs I can store...

I will be doing pretty much all songs at 320kbps...how many 4 minute songs at that bit rate could I store on a 20GB hard drive?

 

[notnormal]

Song (Kb) = 4*60*320
20 GB Harddrive (Kb) = 20000000000*8/1024

20 GB Harddrive/song = 2034.505

So 2034 songs.

Edit: Calcluations changed, as a 20GB harddrive is 20000000000 Bytes. Assuming 1 byte = 1/(10^9) GB. Blame the manufacturers for fudging the specs.

 

[calvinhobs]

Quote:

Originally Posted by notnormal Song (Kb) = 4*60*320 20 GB Harddrive (Kb) = 20000000*8 20 GB Harddrive/song = 2083.333 So 2083 songs.

Thanks...I was just looking around the internet to find that question. I figure it'd be around 2000 songs. Thanks a lot!

 

[Febs]

At 320kbps, the compression ration is 4.5:1, and files will take approximately 3 MB per minute.

So, assuming:

20 GB drive = 20,000,000,000 bytes* and
1 MB = 1024 KB = 1024 KB/MB x 1024bytes/KB = 1,048,576 bytes

A 1 minute song at 320kbps = 3MB per minute = 1,048,576 bytes * 3 minutes = 3,145,728 bytes.

A 4 minute song song would be 4*3,145,728 bytes = 12,582,912 bytes

Then, on a drive with 20,000,000,000 bytes, you could fit approximately 1,589 4 minute songs.

[size=xx-small]*Most drive manufacturers assume that 1 GB = 1,000,000,000 bytes.[/size]

Edit: I see that I wasn't quick enough. OK. One of us is clearly wrong. I found the 3 MB per minute for 320kbps through a Google search. Time to go back and figure out where the mistake is.

 

[notnormal]

Quote:

Originally Posted by Febs A 1 minute song at 320kbps = 3MB per minute = 1,048,576 bytes * 3 minutes = 3,145,728 bytes. Edit: I see that I wasn't quick enough. OK. One of us is clearly wrong. I found the 3 MB per minute for 320kbps in the wikipedia. Time to go back and figure out where the mistake is.

320 kbps = 320 kilobits per second.
320 kbps * (1 byte/ 8 bits) * (1 MByte / 1024 Kilobytes ) * 60 seconds = 2.34375 MB / minute.

 

[Febs]

Quote:

Originally Posted by notnormal 320 kbps = 320 kilobits per second. 320 kbps * (1 byte/ 8 bits) * (1 MByte / 1024 Kilobytes ) * 60 seconds = 2.34375 MB / minute.

Yeah, I was just going through that calculation myself while you replied.

1 kilobit = 1024 bits 1 byte = 8 bits

320 kb/s * 1024 = 327,680 bits per second/8 bits per byte = 40,960 bytes per second.

40,960 bytes/second * 60 seconds/minute = 2,457,600 bytes per minute

Just goes to show that you can't trust everything you find on the internet, which I should know by now.

 

[dommica]

Ok so most 20gb hard drives aren't actually 20gb... so im using the ipod's 18.5gb
2.4576 * 4 = 9.8304mb per song

The real capacity of an ipod is 18.5gb.... therefore
18.5gb * 1024 = 18944mb

So how many songs can it hold?
18944 / 9.8304 = 1927 songs

I half agree with notnormal

Dom

 

[notnormal]

Quote:

Originally Posted by Febs Just goes to show that you can't trust everything you find on the internet, which I should know by now.

Wikipedia is usually a reliable site, but I don't know where they got their number from.

 

[notnormal]

Quote:

Originally Posted by dommica Im jumping to the conclusion that you own an ipod.... The real capacity of an ipod is 18.5gb.... therefore 18.5gb * 1024 = 18944mb Dom

I don't own an iPod. As for the harddrive I went based on the manufacturers fudged specifications.

Manufacturer: 20 GB, assuming 1 byte = (1/10^9) GB.
The claimed 20 GB is actually 20000000000 bytes.
The real capacity is 20000000000 bytes * (1 GB / 2^30bytes) = 18.62645 GB

We differ by about 129.4863 MB.

 

[notnormal]

Quote:

Originally Posted by dommica 2.4576 * 4 = 9.8304mb per song

The 2.4576 MB / Minute is also wrong.

Look at Febs post.
"2,457,600 bytes per minute"

2457600 bytes * (1 MB / 2^20 bytes ) = 2.34375 MB
Which matches my previous post.

2.34375*4 = 9.375 mb per song.

 

[dommica]

Man i give up... can we just settle that it's around 2000 songs lol
Dom

 

[Jahn]

i have about 3200 songs on my ipod right now, and it just pushed past 20gigs. mine is a 40 gigger, so that's real world app - who knows what the avg length of songs are, or how many are lower than 320, etc.

 

[notnormal]

Quote:

Originally Posted by dommica Man i give up... can we just settle that it's around 2000 songs lol Dom

Indeed! There are too many variables that can change the exact number of songs. Yeah, so I said "around 2000 is my final answer Regis" when I was on Who Wants to be a Millionare (j/k).