Rockbox General > Rockbox General Discussion

Difference in sound quality from stock firmware?

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saratoga:

--- Quote from: shoe on September 27, 2007, 05:42:57 PM ---I am just curious (and ignorant) about this.  How does one person's firmware cause a different sound than another's?

--- End quote ---

EQ + post processing mainly.  Otherwise, it should be the same unless theres a bug somewhere.

scharkalvin:
Another reason why Rockbox might sound better is the use of different
codecs.  Some will argue that OGG format sounds better than MP3 and
the OF does not support OGG, you have to use Rockbox to do that.

I just got my E270 in the mail from Woot.  Hope to install Rockbox
over the weekend.  (If I get the packman emulator on it running and my wife
sees it I might have to buy a SECOND Sansa.  She's a packman addict).

Llorean:
Not just that, but even with straight MP3.

If they've "optimized" their MP3 codec in different ways (cutting accuracy in different parts of the code, or similar) it can result in differing output. All MP3 decoders are not equal. Follow that with the fact that the Sansa software seems to do some post-processing on its own (at the very least the louder of the two volume modes seems to add digital gain) it's understandable that there could be some differences, even with MP3 and no apparent EQ applied, because who knows what the Sandisk firmware is doing in the background beyond digital gain, and in terms of the differences in the codecs themselves.

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