If you mean to really REALLY push the quality, audio gets expensive. My video is in service of audio plugins so I have a motivation to do that: the reason my au

If you mean to really REALLY push the quality, audio gets expensive. My video is in service of audio plugins so I have a motivation to do that: the reason my audio is strikingly good on my voice is, it is NOT done with plugins. It's done with a Roswell Colares (or a Sennheiser lav) a $1500 boutique mic inspired by $10,000 mics, into an API 3124 studio pre, directly into a MOTU 16A interface with no further processing. Room treatment also plays a part: the room has two large openings into other spaces and six large T-Fusor diffusors, painted to match the walls. A setup like that projects its sound character into the recording so strongly that there's nothing to fix: when the mics and things are high enough quality it's like the intention of the vocal performance comes through more powerfully in the first place, and this responds very well to digitization and compression.