Android car radio- Android 5.1, brand "tmaxlife" running igo primo 2.4 (2016 release) preinstalled.
It came without tts voices. I installed the vocalizer ex from here with samantha usa igo and Android bundled with vocalizer, which installed fine and works good as long as the radio is not playing​. When the radio is playing she can not finish a sentence. The non tts voices appear to be fine either way. I tried some of the sys.txt lines recommended here with std_muting_device_needed=1 and app_message_start="nav_voice_guidance" etc. Which did nothing. I tried trimmed some of the bloat (at least what looked like bloat considering it has a lot more than most can run with). But that created another issue so it had to revert back.
I an not new to this, I have installed igo several times on other units before (Android and wince) and made modifications and stuff before. Thanks