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yermak / AudioBookConverter

Improved AudioBookConverter based on freeipodsoftware release (mp3 to m4b converter)
GNU General Public License v2.0
749 stars 48 forks source link

Why m4a encoding has become worse? #622

Open racemus opened 3 months ago

racemus commented 3 months ago

Hi

I found out that the old 6.1.2 version did m4a encoding better than the current version. I tried it on the same book with the same quality settings:

Screenshot 2024-08-14 at 08 22 39

With version 6.1.2, I got a 147 MB file, and with the current version, the file size is 297 MB. They sound the same, but the spectrum analysis of the file from version 6.1.2 is even slightly better. File from 6.1.2 6 1 2 File from 6.5.2 6 5 2 What's wrong?

yermak commented 3 months ago

vs current 6.5.2?

racemus commented 3 months ago

@yermak, yes, by current version I mean 6.5.2