Topic: file size hypothetical theoretical question

[jefflester]

I did this simple test with a file I just happened to have handy. Not really representative of a typical live recording since it is a studio track, but nevertheless.

"Come Together" by The Beatles.
WAV is 43.7 MB
I take the WAV into Audition and drop the signal by 10 dB and save a new WAV, which is also 43.7 MB

01. Come Together - The Beatles -10 dB.WAV    43.7 MB
01. Come Together - The Beatles.WAV               43.7 MB

Then I FLAC them at various levels ( I did all Level 0 to 8, but these are representative enough)

FLAC0\01. Come Together - The Beatles -10 dB.flac'  (ratio = 0.520).       22.7 MB
FLAC0\01. Come Together - The Beatles.flac'             (ratio = 0.623).       27.2 MB

FLAC3\01. Come Together - The Beatles -10 dB.flac'  (ratio = 0.484).       21.1 MB
FLAC3\01. Come Together - The Beatles.flac'             (ratio = 0.586).       25.6 MB

FLAC8\01. Come Together - The Beatles -10 dB.flac'  (ratio = 0.471).       20.6 MB
FLAC8\01. Come Together - The Beatles.flac'             (ratio = 0.573).       25.0 MB

The content of the file had a bigger effect on the file size than the level of FLAC encoding. A 10 dB difference in overall RMS level made about a 20% difference in FLAC file size.

The ~10% difference (80MB) in size between daspyknows and furburgers Fogerty FLAC file sets could be accounted for probably ~5 dB difference in RMS level.  If someone wanted to compare the WAVs they would probably find something like that. I don't care enough to do so. I would venture to guess daspy's recording has more dynamic peaks and furburger's (from a cassette) has more compressed peaks.

[daspyknows]

Here is what Furburger posted on my thread in response to this analysis


how retarded are you?

seriously?

you're now claiming that ***smaller*** files have "more dynamic peaks"?

seriously?

you don't know shit.

your show is inferior.

and it shows.

change your fucking board name already.

[Gutbucket]

seriously.
yes.
seriously.

[eye-roll]

[Sloan Simpson]

and it shows

[daspyknows]

Dude's been drinking too much of this 

[daspyknows]

I recorded a show last night and as part of my processing the files for upload I ran a test.  Same fileset, but 2 copies

Original Wav files 1.25GB

First fileset FLAC level 8  (best per TLH) 649 MB
Second fileset FLAC level 0 (fastest per TLH) 704MB

Wav files compressed using Winzip 1.07GB

that is a 7.4% reduction in size attributable only to what level of FLAC compression is used.