control windows phone master volume

Question

hi everybody,

is there any way to control windows phone 7.1 or windows phone 8

master volume programmatically using Microsoft Windows phone SDK?

I assume that it should me possible by native code but I don't know that

native code is part of SDK

any help is appreciated

Answer 1

An app can only affect its own volume.

Answer 2

I saw this app Quiet Hours, which can control the master volume of Windows phone. Which function is used to do so? Please help me out!! Are there any hidden libraries? Can you list them?

Answer 3

http://www.windowsphone.com/en-us/store/app/quiet-hours/f347a36b-80c0-430f-8631-e55046ee5a2a

This Quiet Hours app does that. How's that possible?

Answer 4

We're looking into the matter...

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-Eric.

Answer 5

An app can only affect its own volume.

http://www.windowsphone.com/en-us/store/app/quiet-hours/f347a36b-80c0-430f-8631-e55046ee5a2a

This Quiet Hours app does that. How's that possible?

Answer 6

I asked a Microsoft Coder who is working for Windows phone 8, and he denied having any idea about this. Even if Quiet Hours did some use of hidden libraries, it should have gone to Microsoft for submission. Then, how did they accept this app? Is Microsoft giving away libraries for paid usage?

Answer 7

In my opinion, "Quite Hours" is a really useful app and I appreciate the fact that can handle master volume to turn silent my WP at night, instead of having notifications beeping at 2am.

I would be very disappointed seeing it removed from the store for this cool feature!

I'm puzzled too at "how did they do that!?!?" since I was thinking about creating something similar... and I'm looking forward to have some kind of API for setting master volume programmatically!

Answer 8

NO!!! Many apps with volume sliders are available in store.. THAT means it can affect master volume too...

Answer 9

These apps are using an undocumented API that the certification process doesn't catch. If you search the web enough, you can find it described in other developer forums. 

However, this doesn't follow the design philosophy of Windows Phone, and you shouldn't expect Microsoft to make the API public. They may add a check to block it or might even remove existing apps from the Store. 

Answer 10

For me It's useful, my 620 volume up button is damaged and with this app I able to up the phone volume.

Answer 11

Hi, my app records the sounds via microphone, but when I play the wav file, the volume is too low even turn up the phone system volume. So I wonder how to control the record volume directly or control the wav file's play volume in my app. Can you give me the sample code lines, Thank you.

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enhua2008