Audio out with MHL adapter?

taob · Aug 2, 2012

Does anyone know how audio is handled if the Note is connected to an external display via an MHL adapter? Will it route audio over HDMI, or do I have to option of having the audio play through the internal speaker or the 3.5mm audio jack? I want to connect the Note to my monitor, but I need to route audio separately. The easiest way would be out the headphone jack.

The MHL adapter I will be ordering is this one:

http://www.monoprice.com/products/product.asp?p_id=8805

hoang83 · Aug 2, 2012

Not sure if you can reroute it. Sounds comes through HDMI for me.

taob · Aug 3, 2012

hoang83 said:
Not sure if you can reroute it. Sounds comes through HDMI for me.

Thanks... this could be a problem then. I'll have to see if there is an app that can force which output to use for all system audio (internal speaker, headset, Bluetooth, HDMI, etc.).

Theoriginalgiga · Aug 3, 2012

taob said:
Thanks... this could be a problem then. I'll have to see if there is an app that can force which output to use for all system audio (internal speaker, headset, Bluetooth, HDMI, etc.).

I know this is a little pricy but here's a possible solution:
http://www.monoprice.com/products/p...d=1011002&p_id=7112&seq=1&format=1#largeimage

Not sure if it'll work with an MHL adapter, but it could be worth checking out.

Agoattamer · Aug 6, 2012

Both headphone jack and bluetooth audio will overide the MHL adapter audio automatically. No need to do anything but connect. No way that I know to use internal speaker though.

taob · Aug 8, 2012

Agoattamer said:
Both headphone jack and bluetooth audio will overide the MHL adapter audio automatically. No need to do anything but connect. No way that I know to use internal speaker though.

This does not seem to be the case, at least with CM9-RC2. While the kernel is aware that a headset has been plugged in, only phone audio is affected. If I call my voicemail, I get the usual choice between headset or internal speaker. Phone audio does not route over HDMI. However, game and video playback audio always seems to go over HDMI. Clearly, the kernel is able to route audio where it wants (i.e., it isn't a hardware override).

Code:

08-07 21:51:12.685 I/HeadsetService(23637): Headset=true; Bluetooth=false
08-07 21:51:12.685 I/HeadsetService(23637): Selected configuration: headset
08-07 21:51:12.715 D/AudioPolicyManager(  182): setStreamVolume() for output 1 stream 0, volume 0.031623, delay 0
08-07 21:51:12.715 E/AudioHardwareMSM8660(  182):  unknown stream
08-07 21:51:12.715 D/AudioPolicyManager(  182): setStreamVolume() for output 1 stream 8, volume 0.031623, delay 0
08-07 21:51:12.725 D/AudioPolicyManager(  182): setStreamVolume() for output 1 stream 1, volume 0.231074, delay 0
08-07 21:51:12.735 D/AudioPolicyManager(  182): setStreamVolume() for output 1 stream 7, volume 0.226465, delay 0
08-07 21:51:12.905 D/AudioPolicyManager(  182): setStreamVolume() for output 1 stream 9, volume 0.177318, delay 0
08-07 21:51:12.905 D/AudioPolicyManager(  182): setStreamVolume() for output 1 stream 4, volume 0.226465, delay 0

Agoattamer · Aug 8, 2012

Well it is the case using a stock ICS kernel.

taob · Aug 9, 2012

I'll try temporarily flashing the stock ICS ROM then, and see if starts working.

lilfellabob · Oct 21, 2012

Hey, I am trying to do the same thing (well I want music to play via bluetooth while MHL is outputting visual). Any progress or info?

taob · Oct 22, 2012

lilfellabob said:
Hey, I am trying to do the same thing (well I want music to play via bluetooth while MHL is outputting visual). Any progress or info?

I never got around to trying the Samsung ICS image. What I did in my case was connect my speakers to my monitor (which has HDMI in and 3.5mm audio jack out).

lilfellabob · Oct 23, 2012

Hmm ok, thanks. I can just use audio from the hdmi but I'd prefer bluetooth if possible (just works nicer with my car's headunit)

taob · Oct 23, 2012

As I understand it, this is simply a feature (or limitation) of the way the OS handles audio routing. There's no reason why it cannot simultaneously send audio to any or all outputs. It's all digital and done in software, not like there is a physical connection that has to be switched over from internal speaker to HDMI. So it is just a matter of getting support for that in your ROM. Or grab the source code and do it yourself.

lilfellabob · Oct 24, 2012

Yeah that makes sense - only I do not have the skills to do it myself and not sure how I'd search for a ROM that does that (I doubt many will advertise something like that)

Coincoin0017 · Oct 26, 2012

I found this app "SoundAbout" or "SoudAbout Pro" (if you want full functionality) witch let you change the output : MHL(Digital) or Speaker

it works perfectly for me, sound on the smartphone and video on the monitor (tested on galaxy s3)

taob · Oct 28, 2012

Coincoin0017 said:
I found this app "SoundAbout Pro" witch let you change the output : MHL(Digital) or Speaker This app is not free, unfortunately

it works perfectly for me, sound on the smartphone and video on the monitor (tested on galaxy s3)

Thanks, I'll check out the free version first to see if it will do what I would like it to do!

lilfellabob · Oct 28, 2012

Coincoin0017 said:
I found this app "SoundAbout Pro" witch let you change the output : MHL(Digital) or Speaker This app is not free, unfortunately

it works perfectly for me, sound on the smartphone and video on the monitor (tested on galaxy s3)

Yeah sounds good, I'll check it out, thanks!

Coincoin0017 · Oct 28, 2012

Sorry i made a mistake (i have edited my previous post), the free version works
just run the app after connecting the mhl adapter and set the sound over speaker

but the free version does not contains the digital output in the options if you want to reset the sound over the HDMI
there is only the paid version which can make it

but you can always disconnect and reconnect the câble and the sound is reset automatically over the HDMI

Free / Paid

(sorry for my english)

njweb · Dec 19, 2013

Coincoin0017 said:
I found this app "SoundAbout" or "SoudAbout Pro" (if you want full functionality) witch let you change the output : MHL(Digital) or Speaker

it works perfectly for me, sound on the smartphone and video on the monitor (tested on galaxy s3)

Thanks!!!
Works fine on my Galaxy Note 3 - I now get HDMI audio out with A generic MHL HDMI adapter I just receivedthat I hooked up to my Note 3 (although I also did need to hook up power via micro USB wall adapter charger to the MHL device).

The only issue is that the white plastic 'collar' around the plug does not allow the MHL micro USB plug to fit in my Note 3 USB port WHEN I have a case (Trident Cyclops) around the phone.
I am going to order micro USB to micro USB extension to address this.

In the meantime I was able to test the MHL cable with my Note 3 by temporarily removing (snapping off) the white plastic collar...

MSK1 · Mar 2, 2014

Agoattamer said:
Both headphone jack and bluetooth audio will overide the MHL adapter audio automatically. No need to do anything but connect. No way that I know to use internal speaker though.

Can I take the audio from my note 2 to my AV receiver using the headphone jack?

Agoattamer · Mar 2, 2014

MSK1 said:
Can I take the audio from my note 2 to my AV receiver using the headphone jack?

I wouldn't. The headphone is a slightly amplified connection as the AV receiver using RCA jacks is expecting a non amplified signal.

Audio out with MHL adapter?

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