Audio distorted when BLE is connected

[Epasta]

Hello, we have an android/iOS app on a phone that is connected to my button (nRF51) and to a Bluetooth headset. The app is a kind of walkie talkie that transmit mono audio every time you press the button. What is happen is that if the button is not connected the audio is ok, if the button is connected most of the time the audio is distorted!!! As soon as you turn off the button connection the audio is good again. We did many test and if you don't use the Bluetooth headset but the audio came out directly from the phone , there is no problem. Only if you have both headset and button connected you have the problem!!! There is something I can do? It is really the BLE button connection to use the Bluetooth bandwidth and make the audio distorted? Can I optimize something on my button?

thx

Enrico

[run_ar]

What exactly does this button do? does it only send an on/off signal? Or do you also send audio data from the peripheral/button?

I have done some tests with BLE and audio on iOS. Normally I don't have problems with audio. But if I move away from the phone with the headset so I'm close to loosing the connection I get some distortion, and might end up loosing the ble connection. However, I haven't seen your problem before.

Note that I don't think iOs will accept connection parameter request between 7.5 and 15 ms.