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Subject: [ rockbox-Feature Requests-513672 ] Normalize options
From: noreply_at_sourceforge.net
Date: 2002-08-09


Feature Requests item #513672, was opened at 2002-02-06 10:08
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=439121&aid=513672&group_id=44306

Category: New Codecs
Group: None
>Status: Closed
Priority: 3
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Normalize options

Initial Comment:
-Normalize OUT (for AJB6k & ARJB)
Normalizing the sound output to listen all tracks with
same sound.

-Normalize IN (for ARJB)
like in audiocatalyst or others ripping tools to
always encode with the same power.

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>Comment By: Bjorn Stenberg (zagor)
Date: 2002-08-09 12:13

Message:
Logged In: YES
user_id=1157

AVC implemented in release 1.2.

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Comment By: Nobody/Anonymous (nobody)
Date: 2002-05-21 11:16

Message:
Logged In: NO

Couldn't this be done (at least for Normalize OUT), simply
using the AVC option of the mas3587f in the Recorder?

Regards

Rune :-)

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2002-05-21 11:15

Message:
Logged In: NO

Couldn't this be done (at least for Normalize OUT), simply
using the AVC option of the mas3587f in the Recorder?

Regards

Rune :-)

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2002-05-21 11:15

Message:
Logged In: NO

Couldn't this be done (at least for Normalize OUT), simply
using the AVC option of the mas3587f in the Recorder?

Regards

Rune :-)

----------------------------------------------------------------------

Comment By: Linus Nielsen Feltzing (linusnielsen)
Date: 2002-02-06 10:24

Message:
Logged In: YES
user_id=259137

The normalize functions requires the player to scan the entire waveform
to find the audio peaks.

To normalize the output is theoretically
possible, but would require the entire MP3 file to be scanned in advance to
find the peaks. This will cost time and battery.

To normalize the
input, the waveform would have to be recorded, scanned and encoded
afterwards. This can be difficult, since the MP3 encoding is done by the
MP3 chip on the fly. The firmware woiuld then have two choices:

1)
Record the audio uncompressed, then scan and compress to MP3.

2)
Record the audio compressed, uncompress and scan, recompress
again.

In either case, the MP3 encoding will probably have to be done
in software, since the MP3 chip is a player/recorder chip, not a generic
codec.

However, nothing is impossible...

----------------------------------------------------------------------

You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=439121&aid=513672&group_id=44306



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