Same result on my MY2015 Acenta. And exact same inputs too - wonder if we did anything wrong?
aarond12, you can turn off the startup sound by enabling it (selecting sound1) and then disabling it!
Here is what I sent:
atz
atz
ELM327 v2.1
>ate0
ate0
OK
>ath1
OK
>ats0
OK
>atsp6
OK
>atcaf0...