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koster
koster
Associate II
April 27, 2018
Question

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

  • April 27, 2018
  • 1 reply
  • 670 views
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

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    1 reply

    AvaTar
    AvaTar
    Senior III
    April 27, 2018
    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.

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