Both radios are the same radio except the ATS 20+ has a better encoder and FM BC filtering. They both use the Si4732-A10 DSP chip. This all-in-one solution has softmute. These are not the only radios utilizing softmute. C.Crane, Eton Elite Executive, and others using this series of DSP chips use softmute.
But for programming your ATS 20 or ATS 20+ you can disable softmute in your ino file. BUT beware. The Si4732-A10 will start to kick out a annoying "clapping" like sound! This is why we see all these DSP based radios softmuting. Experimenting with some ino files with softmute disabled then reflashing the radio with factory hex file introduced me to the difference in behavior. The chip is also a tiny bit slower changing bands while softmute is disabled.
This explanation is what brought me to the conclusion that sofmute is better than annoying "clapping" noise with every single detent rotating the encoder. It would be awful on radios made by CCrane, Eton, and Tecsun.
Just keep the original firmware intact or make a new ino file to re-arrange the display to your liking.
But for programming your ATS 20 or ATS 20+ you can disable softmute in your ino file. BUT beware. The Si4732-A10 will start to kick out a annoying "clapping" like sound! This is why we see all these DSP based radios softmuting. Experimenting with some ino files with softmute disabled then reflashing the radio with factory hex file introduced me to the difference in behavior. The chip is also a tiny bit slower changing bands while softmute is disabled.
This explanation is what brought me to the conclusion that sofmute is better than annoying "clapping" noise with every single detent rotating the encoder. It would be awful on radios made by CCrane, Eton, and Tecsun.
Just keep the original firmware intact or make a new ino file to re-arrange the display to your liking.