#CM108 USB Soundcard putting out a 1200Hz sine wave .... Signal is looking funny.... Discretization is clearly visible. Each step is approx 10µs, regardless of the sampling rate used to generate the sine wave.
@adisonverlice Problem lies with the implementation of #CTIA as a short-to-ground signalling.
- The DSP & Analog part of any audio cobtroller need to detect it as such and process it accordingly as well as forward it to the OS like a button input.
And unlike #Touchscreen-obly devices there's enough space and real estate to do audio cnbtrols on anythibg with a keyboard - if necessary with a #Fn-Key - Combo.
- Or in the case of USB-Audio - ICs like the #CM108 they implement the buttons often in hardware on the device and forward them like a multimedia key press to the OS, and that works fine too...




