[PD] LKFS or LUFS-based compression?

[katja]

Ah, sorry for my completely irrelevant pointer. Now I understand
(after consulting wikipedia again) that you want to compress according
to frequency- and sound pressure dependent equal-loudness contours so
you can comply with standards about perceived loudness? Seems that
this requires multiband RMS detection and weighting.

Katja

On Wed, Mar 16, 2016 at 10:20 AM, William Huston
<williamahuston at gmail.com> wrote:
> Thanks Katja.
>
> I did not intend to imply a particular compression method.
>
> I was only asking if anyone has created
> a compressor in Pd with the goal of limiting based
> on Average Loudness rather than Peak Gain.
>
> I don't really know how it works,
> except to guess it is related to
> Fletcher–Munson curves.
>
> I want to get into broadcast more.
> A LKFS or LUFS external (meter and compressor)
> would be very useful.
>
> Limiting based on Loudness is becoming
> both a US and EUR broadcast standard,
> yet there aren't many tools out there,
> it seems.
>
>
>
> On Wed, Mar 16, 2016 at 5:01 AM, katja <katjavetter at gmail.com> wrote:
>>
>> Frankly I had to ask Wikipedia what LKFS and LUFS is. They are
>> loudness standards, they don't indicate compression method.
>>
>> Here's a peculiar method which uses detection of instantaneous
>> amplitudes instead of peak sample values:
>>
>> http://www.katjaas.nl/compander/compander.html
>>
>> From an engineer's viewpoint this approach is highly debatable and you
>> wouldn't use it for all purposes. But it reacts super fast to
>> transients. I use it on acoustic input in live performance.
>>
>> Katja
>>
>> On Wed, Mar 16, 2016 at 7:51 AM, William Huston
>> <williamahuston at gmail.com> wrote:
>> > Has anyone played around with LKFS or LUFS-based
>> > "Loudness Compression"?
>> >
>> > This would be a really handy thing to have
>> > for anyone who creates audio for broadcast TV or Radio,
>> > or movie scores, etc.
>> >
>> > When people grab a compressor, this is what
>> > we mostly want. However, in my experience,
>> > most compressors are peak-level compressors.
>> >
>> > Thanks for any leads/pointers.
>> >
>> >
>> > --
>> > --
>> > May you, and all beings
>> > be happy and free from suffering :)
>> > -- ancient Buddhist Prayer (Metta)
>> >
>> > _______________________________________________
>> > Pd-list at lists.iem.at mailing list
>> > UNSUBSCRIBE and account-management ->
>> > http://lists.puredata.info/listinfo/pd-list
>> >
>
>
>
>
> --
> --
> May you, and all beings
> be happy and free from suffering :)
> -- ancient Buddhist Prayer (Metta)