I’ve been making a concerted effort to get back into shape and while I’d love to say that my beer-gut is diminishing, sadly the most noticeable result has been a growing irritability caused by podcasts that are all published at different audio levels.
Loudness, K-weighted, relative to Full Scale (or LKFS) is a loudness standard designed to enable normalization of audio levels for delivery of broadcast TV and other video.
LKFS is an abbreviation of: Loudness K-weighted Full Scale, and one unit of LKFS is equal to one dB. The LKFS term is used in the ITU BS.1770 standard and the ATSC A/85 standard also operates with this term. Other organizations, such as The European Broadcast Union (EBU), uses the term LUFS, which is an abbreviation ofLoudness Units Full Scale. Despite the different names, LFKS and LUFS are identical.
The LKFS standard (ITU standard) is what allows you to listen to the radio at a consistent level without having to turn the radio up or down every time a new tune is played (unless they’re cranking out some AC/DC then you have to turn up the stereo – it’s the law). That’s awesome right?
What’s not awesome is when I’m on the treadmill and every other podcast is barely audible over my headphones, while others are way too loud, forcing me to have to repeatedly fiddle with the audio levels on my phone.
Let’s face it – I’m not the most graceful of people at times. One of these days, pulling my phone out of my pocket while running is going to result in my breaking a leg as I go flying backwards off the treadmill and into the min-fridge.
The solution is to make sure that every podcast has consistent audio levels, and the magic number that has been settled on is -16 LUFS. I’ve embedded a tutorial by Mike Russel from Music Radio Creative so you can see just how ridiculously easy it is to do Adobe Audition CC.
I don’t know if Audacity can adjust LUFS out of the box (it’s been years since I’ve used it) but I’m sure there are plugins for it (a quick search found this LUFS meter), and even mobile podcasting apps like Auphonic can automatically adjust the levels as they process the audio.
So fellow podcasters, there’s really no excuse to now have your audio at the correct levels and give podcast listeners the best experience, is there?