v1.559: DC block for SAM modes
From the CHANGE_LOG file:
v1.559 Sep 7, 2022
Added DC block to the SAM/QAM modes. There is a temporary menu on the main control panel,
audio tab, to allow A/B testing of the DC block against the existing fade leveler that was
already part of the SAM code. Thanks to Daz for pointing out this problem.