GPU’s are usually good for single instruction multiple data stream type work.
One wonders how something like a convolution reverb algorithm might go if you run the same algorithm on multiple CUDA cores but feeding it multiple audio tracks. Similarly VSTi generation, one note per chord same algorithm.
There’s more than one way to make something parallel.
Mind you, I just bought a passively cooled video card when the GPU is not in use to quiet my PC when doing audio work. If we now get it to do work the fan will spin up 
