You are right.
It runs on an NXP LPC using 32-bit integer arithmetic's
I use 16-bits fixed point with a 16-bit radix.
That is very fast on the Cortex M0+ with it's single cycle 32-bit multiply.
And yes, it sounds very good with it's 16-bit audio resolution at 44KHz.
Remember, the first Nord Lead used the 56002 DSP and sounded very good.
That had nowhere near that performance.