> with a layout override to call that modified filter instead of the normal content

Would it apply to all content in a specific layout or only specific bits of a certain layout?

With the way I have it set up with Jekyll, only a specific post gets the audioseek timestamps added to it, because I wouldn't want it to apply to all lists on the site. I also happen to share a single layout for both podcasts and interviews and interview lists shouldn't get processed with audioseek'd timestamps.

With Jekyll this is super easy to pull off because it's only a custom filter. It can be applied to the specific content I want without having to worry about layouts.