Podcast

Overcast Launches New Audio Engine

Marco Arment has released a version of his Overcast podcast player with “Voice Boost 2,” if you are interested in the nerdy audio side of this, he’s written up a blog post explaining it:

This is about to get nerdier, but bear with me. (Yes, nerdier than ITU broadcast-loudness standards.)

Given a loudness measurement for the incoming audio, quieter podcasts need to be amplified to reach the target. But perceived loudness isn’t the peak of the incoming audio stream — it’s more of an average. Quiet-sounding audio can still have brief moments of loud peaks.

When increasing the volume of digital audio, the biggest challenge is not “clipping” during the peaks — not having any part of the signal pass above the volume ceiling of 0 dB. (It’s a negative scale. This is also why the LUFS value above, which is closely related to the decibel scale used here, is negative.)

Jason Tate
Jason Tate Jason Tate is the founder and editor-in-chief of chorus.fm. He can also be found at @jason_tate on Twitter and on Facebook.