[audacity4blind] Re: RMS Normaliser
- From: Gale Andrews <gale@xxxxxxxxxxxxxxxx>
- To: audacity4blind@xxxxxxxxxxxxx
- Date: Tue, 27 Dec 2011 17:45:16 GMT
| From "Robbie" <tickleberryfun@xxxxxxxxx>
| Tue, 27 Dec 2011 18:18:59 +0100
| Subject: RMS Normaliser
> I know the arguments for and against RMS normalisation and I would like to
> leave that discussion in the respective forums. :-) Let's just say I'm of
> the RMS persuasion and believe in achieving perceived equal loudness by
> normalising the RMS. As it's an important factor when editing and mixing,
> Replay Gain won't help me there. Would you have any other idea for a
> plug-in?
From your description, I would suggest I add your vote for Audacity's
"Normalize" to include an option to normalise by Replay Gain. It has
been discussed. RMS is only an approximation of perceived loudness,
and I think many would feel Replay Gain to give a closer approximation.
Meantime as this is not a specifically VI topic I would suggest you post
to Steve's Forum topic:
http://forum.audacityteam.org/viewtopic.php?f=42&t=55824#p138683
and give him your view on what an "RMS Normalize" or "Equal Loudness"
plug-in should do. Then he can consider that while working on his plug-in.
That plug-in will likely become available before Audacity's Normalize is
modified further.
Gale
> -----Original Message-----
> From: audacity4blind-bounce@xxxxxxxxxxxxx
> [mailto:audacity4blind-bounce@xxxxxxxxxxxxx] On Behalf Of Gale Andrews
> Sent: Tuesday, December 27, 2011 5:41 PM
> To: audacity4blind@xxxxxxxxxxxxx
> Subject: [audacity4blind] Re: RMS Normaliser
>
>
> | From "Robbie" <tickleberryfun@xxxxxxxxx> Tue, 27 Dec 2011 16:50:19
> | +0100
> | Subject: [audacity4blind] RMS Normaliser
> > Can anyone recommend a plug-in that normalises the RMS value? I've
> > searched the forums and plug-in banks for weeks, but I haven't found a
> > single one that does what I want. The built in normaliser uses the
> > peak value and the SC4 effect, if I understand it correctly,
> > calculates the RMS peak, not the actual RMS.
>
> Robbie,
>
> SC4 is a compressor:
> http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#id1882 .
>
> Usually an RMS normalizer will raise the average loudness to a specific
> level such as -6 dB, but the trouble with that is that it will cause the
> peaks to clip, so you either have to compress the signal, or allow it to
> clip.
>
> Are you trying to calculate average RMS and then peak normalize to that
> value? Or trying to make all your tracks "equally loud"?
>
> Analyze > Contrast will detect the "average RMS" (press either "Measure
> selection" button then tab into the box to the right).
>
> If you want "equal loudness", have you tried simply exporting "as is" from
> Audacity then using "Replay Gain"? There is a Nyquist plug-in here that
> approximates the "Replay Gain" algorithm but it is still experimental:
> http://forum.audacityteam.org/viewtopic.php?f=42&t=55824#p138683 .
>
>
>
>
>
> Gale
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