Re: [PD] LKFS or LUFS-based compression?

2016-03-19 Thread 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
 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  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
>>  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@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)

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Re: [PD] LKFS or LUFS-based compression?

2016-03-16 Thread William Huston 
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  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
>  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@lists.iem.at mailing list
> > UNSUBSCRIBE and account-management ->
> > http://lists.puredata.info/listinfo/pd-list
> >
>



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--
May you, and all beings
be happy and free from suffering :)
-- ancient Buddhist Prayer (Metta)
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Re: [PD] LKFS or LUFS-based compression?

2016-03-16 Thread katja 
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
 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@lists.iem.at mailing list
> UNSUBSCRIBE and account-management ->
> http://lists.puredata.info/listinfo/pd-list
>

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[PD] LKFS or LUFS-based compression?

2016-03-16 Thread William Huston 
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)
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