From: "Måns Rullgård" <mans@mansr.com>
To: Mac <macdroid53@gmail.com>
Cc: sox-users@lists.sourceforge.net
Subject: Re: lost sync warning
Date: Fri, 22 Jun 2018 12:14:38 +0100 [thread overview]
Message-ID: <yw1x4lhv2hup.fsf@mansr.com> (raw)
In-Reply-To: <CAHEqMkFWdDLBDyg5pxEwcMPq2cFbNyhsxXk8Mnh9tdtKjawbkQ@mail.gmail.com> (Mac's message of "Thu, 21 Jun 2018 14:54:23 -0400")
Mac <macdroid53@gmail.com> writes:
> Hi,
>
> I did some normalization of some mp3 files and on some got the warning:
>
> sox WARN mp3-util: MAD lost sync
That means the mp3 decoder didn't find a frame sync code where it
expected one. This could be due to file corruption or simply a trailing
ID3 tag.
> The resulting files seem to be ok, i.e. they seem to play from beginning to
> end (I have the pre normalization version of the file for comparison)
>
> Also, the resulting files are much smaller. Sometimes megabytes smaller.
> Whats up with that?
The output probably uses a lower bit rate setting.
> And, does normalizing an mp3 multiple times degrade the audio?
Yes.
--
Måns Rullgård
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prev parent reply other threads:[~2018-06-22 11:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-21 18:54 lost sync warning Mac
2018-06-21 20:33 ` Jeremy Nicoll - ml sox users
2018-06-22 11:14 ` Måns Rullgård [this message]
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