Hi there 🖐️
There was a minor issue with the PCM5102A DAC being used—the same one found in the Jeannie_1. When a sound decayed during the "Note Off" phase, a faint click could be heard at the very end (see the first image). The root cause lies in...
It has turned out that the Teensy Biquad filter is, unfortunately, not suitable for modulation. The filter produces clicking noises when the cutoff frequency is changed or modulated slowly.
I am now reverting to the proven StateVariable filter...
A quick update...
Jeannie_2 is now drawing some nice-looking filter curves :)
I still need to adjust the grid line relative to the cutoff frequency. The "12dB" button allows you to switch the filter from 24dB to 12dB, or vice versa.
Jeannie_2...
I'm not classy enough for haiku's
There was a board called Teensy
Programming it was very easy
When bugs raised their head
Lack of debug left you dead
Adding JTAG the cause you could see.