[mythtv-users] .24 Audio results: mixed

Jean-Yves Avenard jyavenard at gmail.com
Fri Jun 25 01:48:19 UTC 2010


On 18 June 2010 14:52, Douglas Peale <Douglas_Peale at comcast.net> wrote:
> New problems have arisen:
> Without changing any settings, I got sound for a pre-recorded standard definition show (mythbusters)
> Tried liveTV, HD was silent, switch to a SD channel, got sound.
> went into settings changed from 5.1 Alsa:default to 7.1 PulseAudio:default
> Now entering liveTV locks up mythTV. It happens to be tuned to an HD channel, but of course I can't change the channel since it
> locks up.
> The backend is recording something right now and it is a combined frontend/backend system, so I don't want to try too much right

If you upgrade to trunk as of today, I have implemented what we had
discussed here...

The settings will now only show options supported by the selected hardware...
Go in the Setup -> General, go to the Audio page.... (maybe I should
move the audio settings out of general config)
By default, the settings is now filled up only with the current audio
output device as last used.
There is a new scan button located to the right of the audio device
drop box list.

The scan button has two purposes:
1- Scan the list of all audio output available on the machine. The
list isn't static anymore and will only show devices that are actually
present *and* known to work. So if PulseAudio isn't running, option
for pulse will not be shown. Same with the JACK output etc... For alsa
device, it checks what alsa reports (same as aplay -L) and then try
them individually.
2- Check the capabilities of the selected device. So if you want to
use a custom device, you type it, like ALSA:foo ; then press the scan
button. A pop-up will tell you if this device is usable or not and if
it is, the PCM, AC3, DTS, number of speakers and upmix will be enabled
or disabled accordingly

You still have to set the AC3, DTS and PCM checkbox accordingly, as
the system can not know what your amplifier or TV can handle.

The other change, which would fix the previous hang you had ; the
PulseAudio server is now suspended on an as-needed basis.
Before the PulseAudio server would be suspended when mythfrontend got
started, and re-enabled when you would leave. If you changed the audio
configuration during that time, from say Alsa to Pulse, it would then

If you could try and report what you are seeing now that would be
great. Any suggestions on how to improve how it's working now are

I have noticed that the Alsa audio mixer do not work when the pulse
audio server is running (even if suspended)

More information about the mythtv-users mailing list