Rockbox

  • Status Closed
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  • Task Type Patches
  • Category ID3 / meta data
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  • Operating System
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Attached to Project: Rockbox
Opened by Anonymous Submitter - 2004-01-19

FS#1943 - honor the rva2/xrva/xrv frame

Hi,

last friday I received my jukebox recorder 15 and put
rockbox
on it. I did run all my mp3 files through normalize a
couple of month ago. They all have id2.3 tags with an
XRVA frame.
I did not try the code with id1 XRV or id2.4 RVA2 frames.

I put code into rockbox to honor this frame (as good as
possible). Aktually updating the volume is only done for
the recorder.

regards, Matthias (leo@marco.de)

Closed by  bagder
2007-05-19 15:26
Reason for closing:  Rejected
Project Manager
zagor commented on 2004-01-19 08:38

Why is an RVA tag better than the method mp3gain uses,
which requires no extra player support?

Anonymous Submitter commented on 2004-01-20 09:40

I didn’t know about mp3gain. One nice thing about the RVA tag is
that “normalize” doesn’t touch the mp3 data at all. And all
my mp3
files already have a RVA tag…

Matthias

Anonymous Submitter commented on 2004-01-20 11:14

And another nice thing about rva is that you can turn it off, if
you wish to listen to a album or track without volume
adjustment.

Matthias

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Hi Matthias,

I would like to include this patch in the new Cyborg Systems
branch of Rockbox with all the enhanced audio features.

I would like to do it with your blessing as I think this is a great
audio enhancement.

Bluechip
http://homepage.ntlworld.com/cyborgsystems

Anonymous Submitter commented on 2005-12-09 20:25

because the method which mp3gain uses cannot be undo-ed,
unless the undo-data is stored somewhere else(i.e. in a tag)
- loose the undo data, and the changes cannot be reversed
anymore.

With a tag-based solution, things are different: if you
loose the tag, then the changes are undo-ed. Thus, there is
no risk for accidental permanent change of the file.

with a tag you can also have separate album gain and track gain, but i don’t know if the mp3 tags let you do that.. ogg does at least.

Rockbox on software codec platforms has full Replaygain support using either TXXX tags for ID3v2.3 or RVA2 tags for ID3V2.4. Should we close this patch as it’s unlikely that there’ll be support for replaygain on hwcodec?

I don’t believe it’s entirely unlikely. It’s certainly possible as the original patch shows (although I belive it might not be quite as fine-grained as the tags suggest, because of hardware limitations).

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