Fiiting an amount of songs on a CD

[thepunchman]

Hello,
I have recently burn a cassette of music onto my hard drive, it was a 100 minutes cassette (approximately 1 hour: 37 minutes of music).
I would like to know if there is any way possible I can compress the music from the cassette so it can hold on a 80 minute CD. I have tried to compress it to mp3, changed the sampling rate to 22,500 , changed the quality to 96 kbs but the length of the project still stayed at 97 minutes (1 hour:37 minutes) I was under the impression that whenever you compress and convert songs to mp3 it gets smaller in size: and therefore the length should reduce too. What am I doing wrong ( I might be missing the whole concept of this mp3 conversion thing).
I know I can make an audio DVD and that would hold the whole project but that format can only be played on a dvd player.
I would be extremely grateful for your help

thanking you in anticipation

[garrisonkw]

An audio cd is and audio cd is an audio cd. An 80 minute CD will always hold exactly 80 minutes of music. Now, a 700MB data CD can hold a wildly varying amount of music in all sorts of different formats, but a data CD is not an audio CD.

In short, if you're trying to make an audio CD that will play in your average, everyday audio CD player, you'll not be able to fit 97 minutes on it as 97 minutes is more than the 80 minute limit.

[levick]

Hi, What you need to look at is the size of the data not the time of the
project, you can not change the time unless you edit the song by removing some of it.
To make a cd to hold all the songs you want the data must not exceed the 700 MB as mentioned. You will most likely need to load your disc as a data disc rather then an audio disc. By compressing the original wav files to MP3 files you should have reduced them enough to fit on your disc.
I would take the sampling rate back to 44.1khz and then work on the Kbps until you get the data size you need.

[edu]

Hello,
I have recently burn a cassette of music onto my hard drive, it was a 100 minutes cassette (approximately 1 hour: 37 minutes of music).
I would like to know if there is any way possible I can compress the music from the cassette so it can hold on a 80 minute CD.

If it were only 2 minutes or so, I was going to suggest to use MP3Trim. You can use it to cut a portion of the beginning and/or the end of a particular song. But 17 minutes is way to big. Your options : 1) make two audio CDs 2)exclude your least liked songs 3)buy a MP3 player (around $20) which can provide you more than 10 hours of music, depending on the quality.

[edu]

Hi, What you need to look at is the size of the data not the time of the project, ......To make a cd to hold all the songs you want the data must not exceed the 700 MB as mentioned. ..... By compressing the original wav files to MP3 files you should have reduced them enough to fit on your disc.
I would take the sampling rate back to 44.1khz and then work on the Kbps until you get the data size you need.

If I understood your post correctly, you think he's okay if he gets the 97 minutes of songs to 700MB. If recorded as data, the file size of each MP3 song would be very very big if it can be done at all.

[SLK001]

An audio CD is specification driven. It's format is two 16 bit channels, at 44,100 samples per second. Either burn to this specification, or risk nothing being able to play it.

[levick]

An audio CD is specification driven. It's format is two 16 bit channels, at 44,100 samples per second. Either burn to this specification, or risk nothing being able to play it.

Quite correct the audio spec is just as mentioned above. But a MP3 file can be any size depending on the bit rate, that is the compression ratio. If a stand alone player is MP3 compatiable it will look at a data disc full of MP3 files and play then accordingly. So what I am saying, your disc full of MP3 files is no longer a "audio specification" Cd but a data disc full of MP3 files.

Just to prove the point I have taken a 4min 10 second "cd quality" wave file and its data value is 44Mb approx I then compressed it at 44.1khz with a bit rate of 320 Kbps and the same song is now 10mb is size. A 1:4 compression ratio. This same song is now a MP3 file.
You can not make the cd a "audio spec" as it is time driven, however if you burn the disc as a data disc you can get up to 700 MB of mps files burnt.

[SLK001]

I know that you can compress the size with MP3 encoding. If you do, then only MP3 compatible players will play the thing, and it will no longer be IEC908 (the "RED BOOK" standard) compatible.

He also wondered why the total time didn't change. It doesn't change, because the TIME is the only thing that you DON'T want to change. However, with compression, you can cram 97 minutes of audio onto an 80 minute CD (but with limited playback capabilities).

[Cornucopia]

thepunchman, what kind of setup do you have?
DVD burner?
Settop dvd player that plays mp3 cds?
Only AudioCD player (or want to keep it audio cd compatible for friends)?

If you want/have the 1st or 2nd option, no problem. Just encode, author and burn using the appropriate format(s).
If you're going for the 3rd option (my hunch), then your only choices are:

1. Keep redbook specs (stereo, 16bit, 44100Hz,LPCM) and split onto 2 discs.
2. Keep redbook specs and find some 95/97/99 min. media (not nearly as compatible) and/or overburn onto 1 disc.
3. Buy all your friends mp3-capable players and go back to options 1 or 2.

Scott

[thepunchman]

Hello,
Thanks to everyone that replied to my topic, I am very grateful for all of the information you have given me. I have learned much from all of your answers. I now finally grasp the idea of compression and encoding.
Thanks again for all your help.

[kato51]

You can change the tempo of the music by whatever amount necessary to make the collection fit the cd. By changeing tempo only you preserve the pitch so the song won't sound odd. Depending on the music 10-15% change in tempo may not be objectionable. Try it with audacity.