Digital IIR Bessel Filter - Coefficient Computation Algorithm up to 48dB

[koster]

Posted on April 27, 2018 at 12:09

Hi,

does somebody has the algorithm to calculate the digital Bessel IIR coefficients up to 48dB for an audio application?

many thanks

[AvaTar]

Posted on April 27, 2018 at 12:39

I think there is free software availabe to calculate filter coefficients, no correlation to a STM32 implementation required per se.

And check documentation of the ARM DSP-Lib implementation.

However, I would be wary - the limited precision of float (32 bit / 24 bit) might spoil you implementation, i.e. error propagation might make the filter unstable.