Bluetooth headset, dock connector, iPhone, Music

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Re: Bluetooth headset, dock connector, iPhone, Music

Postby AlanOfTheBerg » Thu Feb 16, 2012 11:00 pm

dmwierz wrote:Alan, thanks for the clarification, but in providing it, you've confused me. The way I've read it in other threads, this is how things work:

Prefer Bluetooth on: Music fades out. Music pauses. Instruction plays through audio connection. Music resumes. Music fades in.

Prefer Bluetooth off: Music fades out but continues to play. Instruction plays over music through audio connection. Music fades in.

These scenarios assume that music is playing through a USB audio connection and that a Bluetooth handsfree device is connected.


is this not correct?

In my testing, prefer BT made no difference at all. My testing was as follows:
  • Always output to phone speaker ON: <audio> fades out. <audio> pauses. Instruction plays through speaker. <audio> resumes. <audio> fades in.
  • Always output to phone speaker OFF: <audio> ducks (doesn't 100% fade out). Instruction plays over <audio> through <audio connection: headphone jack or BT>. <audio> fades in.
I may need to see if prefer BT makes any difference. I do not have a dock connector to test with.

I have also noted that most apps have the selector next to their volume control to choose where that app outputs its audio. It would be interesting to increase the scope of the tests to cover what happens when the streaming/Music app is outputting over speaker/headset.
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Re: Bluetooth headset, dock connector, iPhone, Music

Postby AlanOfTheBerg » Thu Feb 16, 2012 10:39 pm

dmwierz wrote:
AlanOfTheBerg wrote:
WeeeZer14 wrote:Does anyone know if the iOS API gives an app that level of control across different outputs all at the same time?

I do not believe that any app can output over multiple connections simultaneously, it can only be one. I wasn't trying to give the impression one could choose multiple simultaneous outputs.


Not sure if we'd wandered off topic, but I wasn't trying to output to multiple connections from one app - I was hoping to have several apps outputting to separate connections: Waze to the BT headset; Audible.com to the dock connector; iPhone output to the BT headset...

I think there are a lot of sub-topics here. My take, given testing with the audio options so far, is that iOS restricts output to one subsystem at a time, for all apps. This is why, when you have the Music app sending a stream to the car stereo over BT, and Waze is set to Not output audio to the speaker, that it is able to just duck the audio, but it doesn't stop the audio stream. They are, essentially, mixed together.

However, with the "send sound to speaker" option selected in Waze, the audio stream from any app is stopped during the announcement, which suggests to me that iOS is the culprit here and can only handle one discrete audio output at a time. I don't know this for a fact as I'm not a developer, but it sounds (pun intended!) reasonable to me.
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Re: Bluetooth headset, dock connector, iPhone, Music

Postby AlanOfTheBerg » Thu Feb 16, 2012 10:16 pm

WeeeZer14 wrote:Does anyone know if the iOS API gives an app that level of control across different outputs all at the same time?

I do not believe that any app can output over multiple connections simultaneously, it can only be one. I wasn't trying to give the impression one could choose multiple simultaneous outputs.
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Re: Bluetooth headset, dock connector, iPhone, Music

Postby AlanOfTheBerg » Thu Feb 16, 2012 7:09 pm

The sound section definitely needs some more tweaks and options to make it useful. I have not been able to figure out how to give voice commands via headset. I was told by a Waze client dev that using "prefer bluetooth" would allow this to work, but it doesn't. I am pretty sure this option is not yet available to the app. It doesn't open the right BT connection. It it did, I could give commands via my car built-in mic as well.

There need to be options like:

Turn instructions: phone speaker, bluetooth headset, bluetooth streaming
Voice commands: phone microphone, phone line-in, bluetooth headset
Volume controls for:
- Phone speaker
- Bluetooth headset
- Bluetooth streaming
Streaming audio control for turn instructions: pause playback or reduce audio
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Re: Bluetooth headset, dock connector, iPhone, Music

Postby abernaert » Fri Mar 02, 2012 5:16 pm

You're right, most music/video apps also play to the speaker if the iPhone is on silent.
I hardly ever use my iPhone for music and/or video so I had to test is with the apps I have. :)
Because of the poor battery life of the iPhone I bought an iPod for music.

I don't use any docks or Bluetooth devices so I guess these options are irrelevant to me.
But still these options are not self explanatory and could use some explaining in the Waze app itself.

But my questions on the sound level of Waze are answered.
If I use an music app and turn up the sound before starting Waze, or adjust the volume when Waze is giving directions gets Waze to the volume level I want.
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Re: Bluetooth headset, dock connector, iPhone, Music

Postby abernaert » Wed Feb 29, 2012 11:05 am

"Play sound to phone speaker" and "Prefer Bluetooth" cause a lot of confusion.
Why not rename these options?
Or remove them if they don't seem to do anything (prefer bluetooth)?
Or add some text to explain the options?

"Play sound to phone speaker" sounds to me like that if this is turned of Waze sound not send any sound to phone speaker. Bur clearly that's not what it does.

What I find very strange is that Waze overrides the silent switch (on iPhone at least).
In my opinion this is very much unwanted behavior.
Silent should be silent.
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