@southfieldsound you're right about 32 bit and the test I have made confirm there's still not zero bits after -1000dB, and even batman can't hear that...
But superman could! After all, each -3dB just divide by 2 the previous factor, so you never reach 0 until the last bit can computationally handle it...
Now to be strict, the math node does the job of nulling to death, so yeah, if you need pure mathematical silence, use this instead.
Just pair it with a smoothed_parameter node to prevent clicks and you're against any upcoming super hero!
