Support Forums › Forums › FIR Designer Support › How can I use LM44 with FIR Designer? › Reply To: How can I use LM44 with FIR Designer?
18 April 2023 at 9:34 pm #651
I’ve looked over your system and in the IIR filters, there may be too many biquads. (I parametric = 1 biquad. For HPF’s and LPF’s, each order 2 = 1 biquad; so a 4th order HPF = 2 biquads.) The Lake API has a comment that hardware limits the number of biquads, shared across all channels, to 37. Your system has.
Channel 1 = 12
Channel 2 = 14
Channel 3 = 12
Total = 38
Maybe remove a few filters and see if the “invalid parameter” error goes away. We don’t access to our Lab Gruppen test hardware for about a week, so we can’t test your system until next week.