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Audio problem with the MHL adapter

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frander
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(Last edited by frander; 5th July 2011 at 08:22 AM.)
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Default Audio problem with the MHL adapter

I can not believe what's happening with my new cable MHL! I have a TV with DVI input, but I've never had any problem because with a simple HDMI-DVI adapter I could always play HD video on my TV and, from the headphone, I have the audio connected to a "AUX input" of a stereo. It always worked with my laptop and my hard drive media!!

The problem is that the galaxy s2 headset turns off the sound when you plug the MHL cable. I can not hear anything on my TV!

I do not know what to do, I think has no solution. I even connected the mobile audio to my notebook's bluetooth, but when I connect the mhl cable no sound is heard again!!

Does anyone have any solution? Is there any menu to force the sound through headphones?

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frander
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I think I have a solution. I Expose it to help someone having the same problem:

1 .- Buy a HDMI male to 5 RCA RGB audio video av component cable

2.- Buy a DVI-I 24+5 Male to 3 RCA RGB Female Converter Adapter

Now you have the video and audio separately using an HDMI cable

3.- Connect the RGB cable to the DVI and audio cables to your stereo

*I can not put pictures of the cables because I am a new user and the system will not let me, sorry.
 
themissionimpossible
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(Last edited by themissionimpossible; 5th July 2011 at 03:58 PM.)
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Quote:
Originally Posted by frander View Post
3.- Connect the RGB cable to the DVI and audio cables to your stereo
Sorry, HDMI doesn't carry analog audio signals. So you are out of luck with this RCA solution.

You need to a) change your TV model, or b) use a cheap AV receiver in between the GS2 and the TV set.
 
frander
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(Last edited by frander; 6th July 2011 at 08:55 AM.)
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Think it's impossible to work? What bad news!! I don't understand why someone sells a cable that doesn't work!

What a fool I was to believe the technical characteristics of amazon:

Gold plated HDMI to 5 RCA component video audio AV cable.
Provides high resolution up to 1080p.
High definition sound and clear image transfers.
* if you write 'HDMI Male to 5 RCA RGB Audio Video AV Component Cable' in google, is one of the first result (amazon)

Does not matter, I've only lost 6 euros (ebay).

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frander
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(Last edited by frander; 6th July 2011 at 01:37 PM.)
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Anyway I don't understand why we talk about converting the image and sound in analog. There are manuals about how to open an HDMI cable and also has the red, green and blue wires inside. Just for separate cables lost the concept of "digital? Not understand...

My TV has DVI input, which is also digital. As I said before, I have an HDMI female to DVI male that works perfectly on my TV when connect my laptop and my multimedia hard drive. If I could break the adapter, it would have too a derivation of wires a pin to another, right? And it works in high definition

All I wanted to do with this cable was to extract the sound from an HDMI cable because the Galaxy S2 lost the sound of the headphone and I can not connect to the AUX input of my amp.
 
themissionimpossible
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(Last edited by themissionimpossible; 7th July 2011 at 02:40 AM.)
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The HDMI digital audio signal is transmitted as a single aggregated digital stream that contains a variable number of digital channels (from 2 to 7.1 and even more).

Also in the pre-HDMI days the DVD's SD multichannel digital audio stream was transferred using a single coaxial cable (electrical) or a single optical cable, hence no separated cables for every channel.
Therefore digital channels have to be previously decoded and separated, and then converted by DACs to discrete analog signals.

No hope then to directly get from HDMI a couple of stereo analog signals to feed your stereo amplifier, you should have read all the negative user reviews of that cable on Amazon UK.

My suggestion: buy a cheap (or used) AV receiver with HDMI inputs/outputs and then connect its analog stereo monitor output to the TV auxiliary audio input (red/white RCAs or 3.5mm connector), or just use a couple of speakers connected to the AV receiver.
 
Serav
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(Last edited by Serav; 7th July 2011 at 04:21 AM.)
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I was really hoping to use this phone with any normal DVI monitor and use headphones connected to the phones headphone jack. I guess this destroys that idea.

Why is it that everytime something like MHL comes along they implement it with absolutely no foresight as to how it might be used?
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themissionimpossible
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I think that MHL is just similar to HDMI in that respect.

So you wouldn't get analog audio output from the GS2 even if it had an HDMI instead of an MHL.

Today the manufacturers of latest cell phones expect connections only with TV sets equipped with complete digital ports (generally HDMI), not considering their products to be used with computer monitors.

BTW, DVI video-only port today is considered not suitable for full-HD audio-video material, and probably couldn't even fully support 1080p/24fps video signals.
 
Serav
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DVI monitors support 60hz 1080p okay. Whether or not they cans support 1080p/30 or 1080p/24 purely depends on the monitor's firmware. Most monitors woudn't support 24hz but some probably support 30hz, which I think the GSII uses.

Also I didn't know HDMI out on phones did the same thing. Thanks for telling me that.
 
SirM2X
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I guess it's the matter of audio routing!
Maybe someday someone could mod the kernel to handle these types of situations ;)
Fingers crossed!

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