A2DP blocker works great

Ipnone5 to Scala Cardo Q2 helmet communication system.
Without the blocker i had calls, siri & even GPS voice working
but no streaming audio. the A2DP blocker fixed this problem.
BTW i emailed the developer, Dalton, & he responded to my
questions in 1 hour. that is right, 1 hour.
sounds like a commercial for the app but i assure you i am a consumer like you.
tmfsr

tmfaulksr about A2DPblocker - Bluetooth Mono