Got a response from the FMOD team regarding licensing for installations:
We provide 3 tiers of license price for game users typically, as advertised on our website. Note these are for ‘commercial titles’ that charge money to be purchased or used. I have more about this at the bottom of the email for the free entry case.
Game licenses are free for ‘indies’ if the budget is less than $500k USD , $5k for budgets between $500k USD and 1.5m, and $15k for budgets above $1.5m
If an indie does more than 1 game a year the price is $2000 per game after the first free on.
For installations, we usually charge per installation location, based on the budget levels above. The only difference is we don’t offer a free/indie tier for sub $500k budgets, so the price would be $2000 in those cases, if there is an entry fee.
If you have free entry, we would consider that no charge, as it falls under our EULA as non commercial. We only charge a license fee if the software FMOD is used in charges a fee to use it.
Meaning that the pricing is the same as for games (https://fmod.com/licensing), unless you have no entry fee in which case the use is free.
I think these are reasonable price points and warrant further development of this integration. Even though the $2000 jump from no entry to any entry might disqualify some uses.