Audio sample rates and bit depth.

Author	Message
Volhout Guru Joined: 05/03/2018 Location: Netherlands Posts: 5992	Posted: 04:27pm 30 May 2026       PID is a mathmatical calculation using proportional x, integral x, and differential x. As such it is essentially a relation of third order. You can compare that to a electronic filter (i.e. LCL). In a filter that results in a maximum roll off of 18dB per octave. Such is the picomite audio filter. But real CD player filters that output 20kHz at 44.1kHz samplerate, require more than 100dB per octave, so they are not of order 3, but more like order 15. Either hardware, or multitap FIR Similar you could work with a lower PID bandwidth if you created a PIIIIDDDD Disadvantage is that the lower bandwidt, and increased number of taps, will slow down the step response. In analogy with the LCL filters: the group-delay will increase. Volhout Edited 2026-05-31 04:13 by Volhout