I am trying to disable the tone code CTCSS and pushed 0 to RxCT & TxCT but the tone is still on. In my ui.c below, you can find that all first 16 channels has been modified. I disabled the VOX with 0 ...

It has been suggested to display the CTCSS tone frequency (in addition to the existing CTCSS code numbers) in the Audio app. This enhancement has been discussed in Discord; just submitting this ticket ...