12-22-2019, 09:43 AM
(12-21-2019, 03:15 PM)hvdwolf Wrote: Android knows different "channels" for audio. On Android, "media" apps use the media channel. The radio is not an Android app. It is a piece of hardware in combination with an analog or digital amplifier, normally unknown to phones. Joying (and all other brands) use a custom made audio switching on their head units to make the radio heard.
If you use media apps together with your navigation app, both use (in 90% of the cases), the same media audio channel. In this case the media player outputting constant (!) audio gets the focus, whereas the navigation app, sometimes outputting audio, has its volume level lowered. Actually the exact other way round as you want it.
If you use the radio, the media channel is "free" for your navigation app.
I have been using Mapfactor Navigator as well. As far as I can remember I set the output to one of the Bluetooth "phone call" options, as if it was an app on a remote BT-connected phone.
On all of these Chinese head units (on any head unit for that matter), BT "phone calls" always get preference over any other channel. Then it might work.
Note though that reall phone calls wait till the phone is picked up. Not all navigation apps are so sophisitcated that they wait 100~300 milliseconds (or so), before starting their output. Sometimes the first part of a navigation instruction might be cut off otherwise. Building up a BT phone call channel (which is 2-ways) simply takes some time.
But it remains a struggle. I only know and use navigation apps that use OSM data. It is always a trial and error in the navi app itself to check which output is best.
But why are the navigation systems so extremely quiet when no audio app is active, let alone music is playing? And why are the navigation systems completely muted when the GPS monitor is deactivated?
Two different music players can run parallel and play music at the same time. But not even one navigation system alone can play sound.
I find that somehow strange. And in the navigation systems, where I can select the channel, I either have no sound at all, or too quiet.
Only Navigon does something different here. Because there TTS works. It also somehow overrides this "China mute". There music and navigation runs parallel.
Whereby on the mobile Navigon made sure that the music was turned down for a short time. This does not work on the China thing.
A strange behaviour. I would use Navigon, but it has been discontinued some time ago and is no longer updated.