linuxaudio.org

Quoting Robin Gareus (2011-12-11 14:27:35)

quoted text
>On 12/11/2011 01:19 PM, Fons Adriaensen wrote:

>> On Sun, Dec 11, 2011 at 12:49:10PM +0100, Robin Gareus wrote:

>>

>>> For comparison, ebur128 reported:

>>>   Loundness-range 19.1 LU; Peak 6.7 LU for the Chaplin movie.

>>> and

>>>   Loundness-range 11.3 LU; Peak 15.3 LU for the youtube video,

>>

>> ?? ebur128 does not report anything called 'Peak' in LU.

>

>No it does not. "Momentary max" did not fit in the line w/o line break

>in my mailer :)

>

>> The relevant values are the first two: 'Integrated loudness'

>> and 'Loudness range'. The first should determine any gain

>> correction, the second can be used to decide if some com-

>> pression would help.

>>

>> The last two, 'Momentary max' and 'Short term max' (I guess

>> one of these is what you call 'Peak') are for information

>> only and should not be used for the purpose discussed in

>> this thread.

>

>Thanks for the clarification. So let me correct that:

>

>The Great dictator DVD has an

> Integrated Loudness of 4.1 LU, Loudness Range 19.1 LU.

>

>and 'Music for one appart. and 6 drummers' from you-tube:

> Integrated Loudness:  12.9 LU, Loudness Range 11.3 LU

>

>Both are already normalized to 0 dbFS.

>

>

>Checking some more, revealed that you-tube does not actually normalize

>audio volume automatically: e.g.

>http://www.youtube.com/watch?v=hJMEvDu0K2E peaks at -16.5 dbFS

> Integrated Loudness: -1.7 LU, Loudness Range 9.9 LU

>

>> Updates of ebur128 will show only the first two, unless

>> you explicitly ask for the others as well.

>>

>> Ciao,

>>

>

>Cheers!

>robin

Thanks everyone,

sorry for the late answer, I had a combination of email client trouble

with Christmas stress among other things.
It would be very nice if at some point youtube would use such a system.

It's rather common today that people use youtube playlists instead of

local music. This could at least solve the problem of different volume.

Anyway, I won't be implementing replaygain at this time, but I still

think it's worth doing. Maybe I'll pick up the idea some other time or

someone else does.
For the project I decided to go with the ecasound GUI. The plan is to

write the GUI using JUCE. The minimal set of goals is, well, minimal,

but I have a few ideas, I'll see where to got from there. No idea how

usable it will become. Ecasound sure could use a GUI other than the Tk

thing nama provides. Imho ecasound has also become more interesting

with the recent addition of LV2 support.
Thanks everyone for sharing your thoughts,

I wish you happy holidays.
Regards,

Philipp
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