(without careful listening)
And that brings us to: How are you listening? Good quality speakers or headphones are handy. The object is to catch errors before anybody else can hear them.
Hollywood loves the Sony MDR7506 headphones. They're not that good to settle in and watch a movie, but they will show you errors in your show.
This is NPR-West David Greene with his.
Good speakers are harder. I have an oddball collection of models I like to listen to but I don't think are made any more. I have used the Rokit series. I have a pair of KRK Rokit 5s. If I had to do it again, I would have bought larger versions.
They're handy because they have the amplifier and equalizer—all the peripherals—built-in. Just connect an analog cable to your system, plug them in and go. I've seen these in use for other performances and systems. I'm pretty sure that's them in this Pomplamoose production.

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It's a little concerning this didn't come up in your postings or questions. Mixing and equalization make your production sound like something. There is a goal. You have to be able to hear that something. It's not push the equalize button and go home.
There are audiobook readers who post on the forum with a long list of corrections and changes they made to their performance.
"What did it sound like before you changed it?"
"......ummmmmm........"
You should be able to answer that.
Koz