Let's take a look.1. Length of file - time for file to play (assuming music). For wave files, it is approximately 11.0 MB per minute of song.
2. Type of file: Wave files are the largest; mp3 files and other types of compressed files vary depending upon the amount of compression and the audio codec used to compress them. MP3 files at 128 kbps will be about 1/9 th the length of a wave file (if my memory serves me correctly).
Here is a case study using "Red River Valley" (you may also Listen to "Red River Valley") as an example.
( I should really put them in a formatted table, it is very hard to read when they are NOT aligned. But I'm not allowed to use html, sorry! Chris, can I get your permission to use html? )
The following numbers are in this order:FN FS SF BR WL S/M
0 16 44.1 1411 16 S
1 8 44.1 706 16 M
2 4 44.1 352 8 M
3 1 11.025 88 8 M
4 .97 11.025 88 8 M
All the data are generated using GoldWave.(Thank you Chris, Great Product!) Actually, you can also verify these numbers by reasoning.
FS:File Size, Mbytes
SF:Sampling Freq, KHz
BR:Bit Rate, kbps
WL:Word Length, bits
S/M:Stereo/Mono, S for Stereo, M for Mono
FN=0 Original file SF=44.1 16 bit stereo
FN=1 Reduced file SF=44.1 16 bit mono
FN=2 Reduced file SF=44.1 8 bit mono
FN=3 Reduced file SF=11.025 8 bit mono
FN=4 reduces file length by 5 sec from 135sec to 130sec, otherwise same as FN=3
The final file size before length modification for a 11.025 SF, 8-bit mono(FN=3) is 1M bytes which is reduced from original 16 M byte 44.1 SF, 16 bit stereo(FN=0) . By contrast, a compressed MP3 44.1 SF, 128 BR stereo is about 1.45M bytes(which is very close to piano nick's estimate 1.8M bytes, Great Call!). Then I noticed there is a 5 sec silence at the beginning of the song, which I removed by GoldWave again, resulting another 3% saving to get (FN=4) the absolute bottom at 970K bytes.
The bottom line is you can reduce your file size 33% below its MP3 format and still keep the song in wave format and a whopping factor of 16 from its original wave format. This is important if you want to place small files on the web but you can not get a mP3 player on your web page which is exactly what happened to me. Keep in mind you obtain the size saving at the expense of quality of your audio signal