I know I'm late, but just for reference, I had the same problem as you
The audio signals I was trying to input where of size 1xNsamples, this error was fixed by trasposing the signals to Nsamples x 1
- Mismatch between NumCoeffs and number of valid bandpass filters.
The default NumCoeffs is 13, specifying ('NumCoeffs',12 ) fixed it for me. If it doesn't for you, you'll have to lower the value until it does.