I’m working on a game where rooms change sizes while you’re in them. I’d like to be able to use a convolution reverb and resample the IR so it speeds up/slows down, giving the impression of a room getting bigger/smaller.
I thought the easiest way would be to create a custom plugin by copying the code of the Convolution Reverb and slapping a pitch knob on it. (If Firelight allow you to poke around in there)
I’m not a coder - I’d hire one - but I’m wondering if this is a) the best solution to my problem and b) feasible.
The Convolution Reverb plugin unfortunately doesn’t support changing the pitch of the IR. Depending on the specifics of your game, you could potentially use a series of different discrete “room size” IRs, or a number of IRs that move from/to various sizes/pitches to, to emulate this effect.
It also isn’t possible to copy/modify the source code of the FMOD Engine effects, and it likely wouldn’t be quite so simple as slapping a pitch knob on it. However, a custom DSP plugin effect using FMOD’s DSP API would definitely be what I’d recommend looking into if you can find a convolution reverb and pitching/resampling algorithm that suits your needs.
Alternatively, if you have access to Max & RNBO, you may be able to use an effect created in that instead - FMOD’s Core API examples contains the “fmod_rnbo” example, which demonstrates how to integrate exported RNBO code into an FMOD effect.
The game is all about stretching and squashing and every single room gets stretched to varying degrees so, unfortunately, a discreet bank of IRs would be quite out of the question