Re: [PD] LKFS or LUFS-based compression?
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 Hustonwrote: > 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) ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] LKFS or LUFS-based compression?
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, katjawrote: > 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) ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Re: [PD] LKFS or LUFS-based compression?
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 Hustonwrote: > 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 > ___ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
[PD] LKFS or LUFS-based compression?
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