[Ardour-Dev] a3: Normalise

Patrick Shirkey pshirkey at boosthardware.com
Mon Nov 1 21:25:22 PDT 2010

On Mon, November 1, 2010 7:59 am, Sakari Bergen wrote:
> On 01.11.2010 14:43, Patrick Shirkey wrote:
>> On Fri, October 29, 2010 3:10 pm, Sakari Bergen wrote:
>>>    Hi,
>>> The export normalize ony adjusts the overall volume, so that the peak
>>> value is as high as possible without clipping. Any other effect is
>>> probably due to psychoacoustic phenomena (e.g. equal-loudness curves),
>>> or some non-linearities in your playback chain.
>> I was working with this in mind so I exported a couple of mixes. You can
>> really hear the difference in these two files.
>> The first is with the normalise enabled.
>> http://djcj.org/audio/kotau/abundance/Abundance-Ambient-Psy-Trance-DJ_Kotau_Session_2010-10-31.flac
>> http://djcj.org/audio/kotau/abundance/Abundance-Ambient-Psy-Trance-DJ_Kotau_Session_2010-11-01.flac
>> I will stop using that feature for now as it is affecting the levels too
>> much for my liking.
> I challenge you to import these two files into Ardour (onto two tracks)
> and invert the phase of the other track to hear the difference between
> the files. By adjusting the level of one track about 1.5 dB, the tracks
> should cancel each other out. It will be hard to hit the exact right
> level for total cancellation, but you should notice, that nothing stands
> out from the difference signal.

I am happy to run this test.

Apart from confirming what you have written above what would be the real
world application of such data?

For example if I export the track and then normalise it against say 10
other tracks will that change the bass/high levels as significantly?

Otherwise I think it is a useful feature but just not working out for me
with this mix.


> Br, Sakari
>>> -Sakari-
>>> On 28.10.2010 04:32, Patrick Shirkey wrote:
>>>> Hi,
>>>> How does the normalise function work in ardour3 exporter?
>>>> I have noticed it made some decisions on the levels of some of my
>>>> tracks
>>>> that affected the overall mixdown. Particularly the vocal tracks seem
>>>> to
>>>> have been affected by lowering the volume or maybe the other tracks
>>>> have
>>>> been boosted?
>>>> Cheers.
>>> --
>>> Sakari Bergen
>>> 050 3754859

Patrick Shirkey
Boost Hardware Ltd.

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