Mailing List Archive

I had it working for a time using my Asus M2A-VM HDMI
<http://dvbn.happysat.org/viewtopic.php?t=46574>

But I had massive issues with the onboard video, so now I am using a
standalone NVidia with DVI and the standalone SPDIF out.


Adam Skinner wrote:
> Can anyone who successfully uses a hdmi connection from a frontend with
> audio please tell me what hardware they used.
>
> Im really after a new matx motherboard with serial RS232 (for lirc) with
> hdmi (incl audio). I cannot find any with a serial port - and as a
> result am maybe looking to buy a new graphics card.
>
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Adam Skinner wrote:
> Can anyone who successfully uses a hdmi connection from a frontend with
> audio please tell me what hardware they used.
>
> Im really after a new matx motherboard with serial RS232 (for lirc) with
> hdmi (incl audio). I cannot find any with a serial port - and as a
> result am maybe looking to buy a new graphics card.
>
Another option could be to buy a usb-rs232 adapter. It's easy to install
and it's cheap. A recent kernel should support it and once plugged in a
usb port, udev will create the device /dev/ttyUSB0.
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2008/5/23 Emery Guevremont <emery.guevremont@gmail.com>:

> Another option could be to buy a usb-rs232 adapter. It's easy to install
> and it's cheap. A recent kernel should support it and once plugged in a
> usb port, udev will create the device /dev/ttyUSB0.

You'd have to be careful with this, see below:

-- LIRC FAQ http://www.lirc.org/faq.html --
5. Can I use a home-brew LIRC receiver with a Serial to USB adapter?

No, this won't work. But there is a project working on a dedicated USB
transceiver. Using an Irman with USB adapter should work though.
---

Ver
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btsglw wrote:
> 2008/5/23 Emery Guevremont <emery.guevremont@gmail.com>:
>
>
>> Another option could be to buy a usb-rs232 adapter. It's easy to install
>> and it's cheap. A recent kernel should support it and once plugged in a
>> usb port, udev will create the device /dev/ttyUSB0.
>>
>
> You'd have to be careful with this, see below:
>
> -- LIRC FAQ http://www.lirc.org/faq.html --
> 5. Can I use a home-brew LIRC receiver with a Serial to USB adapter?
>
> No, this won't work. But there is a project working on a dedicated USB
> transceiver. Using an Irman with USB adapter should work though.---
>
Looks like you're right. But I'm a little surprise since this is
something the kernel handles. I don't see how only certain things can
work with a USB/RS232 adapeter and others like lirc can't. I've never
used lirc, but if you're able to change the serial port from ttyS0 to
ttyUSB0, I don't understand how it wouldn't work.
> Ver
>

>btsglw wrote:
>
>>2008/5/23 Emery Guevremont
>><mailto:emery.guevremont@gmail.com><emery.guevremont@gmail.com>:
>>
>>
>>
>>>Another option could be to buy a usb-rs232 adapter. It's easy to install
>>>and it's cheap. A recent kernel should support it and once plugged in a
>>>usb port, udev will create the device /dev/ttyUSB0.
>>>
>>>
>>
>>You'd have to be careful with this, see below:
>>
>>-- LIRC FAQ <http://www.lirc.org/faq.html>http://www.lirc.org/faq.html --
>>5. Can I use a home-brew LIRC receiver with a Serial to USB adapter?
>>
>>No, this won't work. But there is a project working on a dedicated USB
>>transceiver. Using an Irman with USB adapter should work though.---
>>
>>
>Looks like you're right. But I'm a little surprise since this is
>something the kernel handles. I don't see how only certain things
>can work with a USB/RS232 adapeter and others like lirc can't. I've
>never used lirc, but if you're able to change the serial port from
>ttyS0 to ttyUSB0, I don't understand how it wouldn't work.
>

Most USB to serial devices have poor or non-existent handling of the
serial hardware handshake lines the are used for LIRC control. They
are designed for pushing Tx/Rx serial bits and not bit-banging the
handshake lines.

LIRC using the serial handshake lines requires precise timing control
and the ability to bit-banging them.


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Adam Skinner wrote:
> Can anyone who successfully uses a hdmi connection from a frontend with
> audio please tell me what hardware they used.
>
> Im really after a new matx motherboard with serial RS232 (for lirc) with
> hdmi (incl audio). I cannot find any with a serial port - and as a
> result am maybe looking to buy a new graphics card.
Also, just another idea - is there a specific reason you want to use a
homebrew RS232 LIRC box? When I was building my myth box I found pretty
much all TV tuner cards and DVB cards nowadays come with a remote
supported by LIRC anyway.
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>> Can anyone who successfully uses a hdmi connection from a frontend
with
>> audio please tell me what hardware they used.
>
>> Im really after a new matx motherboard with serial RS232 (for lirc)
with
>> hdmi (incl audio). I cannot find any with a serial port - and as a
>> result am maybe looking to buy a new graphics card.
>Also, just another idea - is there a specific reason you want to use a
>homebrew RS232 LIRC box? When I was building my myth box I found
pretty
>much all TV tuner cards and DVB cards nowadays come with a remote
>supported by LIRC anyway.

I've got a nice existing mythtv setup - 4xfrontends all with the same
cheap ebay lirc serial devices AND more importantly same remotes. I
really want to keep it this way. (and its for a remote fe)

I have a feeling that perhaps my remote may work with a usb reciever -
it may be commonly used by the myth community - its an HP MCE media
remote. Google found this: http://ruel.net/pc/pvrpix/mce-remote.jpg

Anyway , back to the original discussion of HDMI + Audio. Anyone have
any success? The asus mb that was mentioned I was looking at.



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> Anyway , back to the original discussion of HDMI + Audio. Anyone have
> any success? The asus mb that was mentioned I was looking at.
>
>
FYI To get the audio to work with that board I had to use latest SVN/CVS
snapshot of ALSA from alsa-project.org. The version shipped with Ubuntu
will not do it properly.

Also don't forget the onboard video (and therefore HDMIi video) on that
card is no good until a new fglrx driver comes out.

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On Thu, Jul 23, 2009 at 3:00 PM, Zach<uid000@gmail.com> wrote:
> On Thu, Jul 23, 2009 at 5:50 PM, Phil Linttell<phil.linttell@rogers.com> wrote:
>>
>> Date: Thu, 23 Jul 2009 16:47:59 -0400
>>>
>>> From: Zach<uid000@gmail.com>
>>> Subject: Re: [mythtv-users] nvidia 8200 IGP + VDPAU no luck
>>> To: Discussion about mythtv<mythtv-users@mythtv.org>Phil,
>>>
>>> I'll give give 190.x a try.  I changed my cpu scaling to performance
>>> which cleared things right up.  However I am getting the tearing, so
>>> maybe the newer drivers will help that.
>>>
>>> I'm also curious about your audio over HDMI, which I'll ask about in a
>>> separate thread.
>>>
>>> Thanks
>>>
>>
>> Zach,
>>
>> Thought I'd save you the trouble of starting a new thread to ask me about
>> HDMI audio.
>>
>> Believe it or not, I'm using ALSA to PulseAudio 0.9.15.   I've also tried
>> the MythTV patch for PulseAudio (5473).   (I did at one point sideline Pulse
>> and use ALSA native, but I couldn't use my Bluetooth headset properly that
>> way.)  I figure Myth has to support Pulse properly at some point, given that
>> it's so integral to newer distributions.
>>
>> Pulse let's me redirect the output to HDMI or analogue.... and I can even
>> play it in stereo over my Bluetooth headphones.
>>
>> However, it's not perfect.  With ALSA->Pulse, when I fast forward, I have
>> about a 1-in-3 chance of not having any audio... so I might have to forward
>> a little further on, or back up a bit until I get it again.  Annoying, but I
>> live with it in the hopes that someone will fix it one day  ;-)  Not sure it
>> would be acceptable to my wife, but I haven't put my system into production
>> yet.
>>
>> PuleAudio direct I always loose sound after a fast/forward, pause, volume
>> change, etc.... and there's no way to get it back short of starting the
>> recording over again.   It looks like 5473 is seeing some attention, so I'm
>> hopeful it will be the final solution.
>
> Okay thanks Phil.  Do you have 5.1 audio working over HDMI?  I think I
> read somewhere that the best you could hope for was stereo with the
> linux nvidia drivers.
>
> Zach
>
> --
> :wq!
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If you are doing digital passthrough you will get out what is being
transmitted as myth does nothing to the sound. You may be confused
because one of the myth checkbox settings is stereo but that is just
because of some quirk. Change the setting label to "works" and
"doesn't work" instead of "stereo"and "5.1" and you will be happy.

Allen
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On Friday, February 2, 2024 4:44:29 PM AWST David Watkins wrote:
> Presumably the first monitor is not detected as having an hdmi audio
> capability? Does it have built in speakers?

No speakers, but a headphone jack that does work (just no vu control)

alsamixer does not show a device

pavucontrol lets you configure a hdmi output. The meter bar shows activity. The
level is unaffted by the level slider that does move.

> On Fri, 2 Feb 2024 at 05:51, James Linder <jam@tigger.ws> wrote:
> > > On Jan 31, 2024, at 15:41, Stephen Worthington
> > > <stephen_agent@jsw.gen.nz>
> >
> > wrote:
> > > On Wed, 31 Jan 2024 15:05:45 +0800, you wrote:
> > >> The lack of VU control does not happen on other monitors!
> > >>
> > >> I’m using a SAMSUNG LS32A700NWEXXY 32INCH S7 4K monitor. I am trying to
> >
> > not use a USB-audio-line-out (which works fine) but use the monitor
> > headphone output.
> >
> > >> All is fine except I have NO VU control. I have tried pulse and alsa
> >
> > controls (where the slider moves) but it has no effect on volume.
> >
> > >> Wunse-upon-a-time I’m sure I recall ‘myth internal volume control’ It
> >
> > seems to be gone. Currently vol [adjusting the mixer] from 0..100% has no
> > effect.
> >
> > >> I can turn the speaker volume knob but I’d prefer local control. Any
> >
> > opinions ?
> >
> > >> Thanks
> > >> James
> > >
> > > So is the audio going to the monitor on the HDMI connection? If so,
> > > then you need the volume controls for the HDMI audio device, not the
> > > motherboard audio device. In alsamixer, use F6 and select the HDMI
> > > device.
> >
> > Under ALSAMIXER there is no hdmi device, yet the sound, without vu control
> > comes out the monitor headphone socket.
> > With another monitor, ASUS, there IS a hdmi sound device and the level can
> > be changed
> >
> > The USB sound dongle was $10 so I’ll mutter the rude word, beeep, and
> >
> > keep using it, where all is works as expected
> >
> > Thanks
> > James
> >
> >
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On 02/02/2024 10:34, jam wrote:
>
> No speakers, but a headphone jack that does work (just no vu control)
>
> alsamixer does not show a device
>
> pavucontrol lets you configure a hdmi output. The meter bar shows activity. The
> level is unaffted by the level slider that does move.
>
Is it possible that the monitor itself has some audio controls? Most monitors have buttons or
on-screen controls available, does yours have any audio options? Maybe even a volume control?

--

Mike Perkins


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You could experiment with this setting:
mythfrontend -> Setup -> Audio - > Use internal volume controls (checked)
-> Mixer device
On my system, if the value is "ALSA:default" then the HDMI audio output
volume is constant / maximum.
When the value is set to "software" then I can control the volume with the
"[" and "]" keys.

Klaas.


On Fri, 2 Feb 2024 at 16:55, Mike Perkins <mikep@randomtraveller.org.uk>
wrote:

> On 02/02/2024 10:34, jam wrote:
> >
> > No speakers, but a headphone jack that does work (just no vu control)
> >
> > alsamixer does not show a device
> >
> > pavucontrol lets you configure a hdmi output. The meter bar shows
> activity. The
> > level is unaffted by the level slider that does move.
> >
> Is it possible that the monitor itself has some audio controls? Most
> monitors have buttons or
> on-screen controls available, does yours have any audio options? Maybe
> even a volume control?
>
> --
>
> Mike Perkins
>
>
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>

On 2/2/24 10:55, Mike Perkins wrote:
> On 02/02/2024 10:34, jam wrote:
>>
>> No speakers, but a headphone jack that does work (just no vu control)
>>
>> alsamixer does not show a device
>>
>> pavucontrol lets you configure a hdmi output. The meter bar shows activity. The
>> level is unaffted by the level slider that does move.
>>
> Is it possible that the monitor itself has some audio controls? Most monitors have buttons or
> on-screen controls available, does yours have any audio options? Maybe even a volume control?
>
> --
>
> Mike Perkins
>
I believe that, when he originally posted about his problem, that was mentioned and that he wanted to use Myth's volume control.

I had a similar problem long ago, I remember vaguely using pulse utils to figure out the proper output for audio that went through the software mixer. From that, I knew the correct device to tell Myth which device name to use.

Basically, it was a distro initial configuration error in default device name usage that was transparent in most usages, but become a thing with Myth. Once I figured out the sound system's changes from the last time I had to, finding the correct device was simple enough. Argh, Shrek and his layers...

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On 02/02/2024 16:40, Stephen P. Villano wrote:
>
> On 2/2/24 10:55, Mike Perkins wrote:
>> On 02/02/2024 10:34, jam wrote:
>>>
>>> No speakers, but a headphone jack that does work (just no vu control)
>>>
>>> alsamixer does not show a device
>>>
>>> pavucontrol lets you configure a hdmi output. The meter bar shows activity. The
>>> level is unaffted by the level slider that does move.
>>>
>> Is it possible that the monitor itself has some audio controls? Most monitors have buttons or
>> on-screen controls available, does yours have any audio options? Maybe even a volume control?
>>
>> --
>>
>> Mike Perkins
>>
> I believe that, when he originally posted about his problem, that was mentioned and that he wanted
> to use Myth's volume control.
>
> I had a similar problem long ago, I remember vaguely using pulse utils to figure out the proper
> output for audio that went through the software mixer. From that, I knew the correct device to tell
> Myth which device name to use.
>
> Basically, it was a distro initial configuration error in default device name usage that was
> transparent in most usages, but become a thing with Myth. Once I figured out the sound system's
> changes from the last time I had to, finding the correct device was simple enough. Argh, Shrek and
> his layers...
>
My point was that there might have been a hidden control on the monitor which was set to minumum!

--

Mike Perkins


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On 2/2/24 10:55, Mike Perkins wrote:
> On 02/02/2024 10:34, jam wrote:
>>
>> No speakers, but a headphone jack that does work (just no vu control)
>>
>> alsamixer does not show a device
>>
>> pavucontrol lets you configure a hdmi output. The meter bar shows activity. The
>> level is unaffted by the level slider that does move.
>>
> Is it possible that the monitor itself has some audio controls? Most monitors have buttons or
> on-screen controls available, does yours have any audio options? Maybe even a volume control?
>
> --
>
> Mike Perkins
>
I believe that, when he originally posted about his problem, that was mentioned and that he wanted to use Myth's volume control.

I had a similar problem long ago, I remember vaguely using pulse utils to figure out the proper output for audio that went through the software mixer. From that, I knew the correct device to tell Myth which device name to use.

Basically, it was a distro initial configuration error in default device name usage that was transparent in most usages, but become a thing with Myth. Once I figured out the sound system's changes from the last time I had to, finding the correct device was simple enough. Argh, Shrek and h

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> On Feb 3, 2024, at 01:42, Stephen P. Villano <stephen.p.villano@gmail.com> wrote:
>
>
> On 2/2/24 10:55, Mike Perkins wrote:
>> On 02/02/2024 10:34, jam wrote:
>>>
>>> No speakers, but a headphone jack that does work (just no vu control)
>>>
>>> alsamixer does not show a device
>>>
>>> pavucontrol lets you configure a hdmi output. The meter bar shows activity. The
>>> level is unaffted by the level slider that does move.
>>>
>> Is it possible that the monitor itself has some audio controls? Most monitors have buttons or
>> on-screen controls available, does yours have any audio options? Maybe even a volume control?
>>
>> --
>>
>> Mike Perkins
>>
> I believe that, when he originally posted about his problem, that was mentioned and that he wanted to use Myth's volume control.
>
> I had a similar problem long ago, I remember vaguely using pulse utils to figure out the proper output for audio that went through the software mixer. From that, I knew the correct device to tell Myth which device name to use.
>
> Basically, it was a distro initial configuration error in default device name usage that was transparent in most usages, but become a thing with Myth. Once I figured out the sound system's changes from the last time I had to, finding the correct device was simple enough. Argh, Shrek and h

Not *wanted* more like if all else fails. But that too failed.
Beautiful sound, just can’t turn it down without moving seat
James

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