Hi,
1. I was wondering if MP3/DTS/AC3 passthrough is at the discussion point only
or
is someone actively looking at developing it?
2. I think that encoding needs to be considered as part of the design ie. the
possibility of AC3 or MP3 encoding before output to SPDIF.
Perhaps you're already
Hi,
Great news that AC3 passthrough is working. Well done!
Are there any issues with AC3 encoding as I am using the A52 plugin from
Pulseaudio (without your patch) and required the following hacks:
a. A rate converter in asoundrc:
# Rate Converter to 48kHz, needed for Pulseaudio it seems
: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support
On Sat, 2010-07-10 at 08:05 +, Michael Rans wrote:
Even with these hacks, I found that sometimes I see:
I: module.c: Unloading module-alsa-sink (index: #4).
D: module-always-sink.c: Autoloading null-sink as no other sinks
detected
tiemout=0 here:
load-module module-suspend-on-idle
But I still need to go via the rate converter to the a52 encoder in asoundrc.
Cheers,
Mike
From: Michael Rans mcar...@yahoo.co.uk
To: General PulseAudio Discussion pulseaudio-discuss@mail.0pointer.de
Sent: Sat, 10
My default.pa line has rate set at 48000 which I guess would take precedence:
load-module module-alsa-sink device=Filter_RateConvert rate=48000
sink_properties=device.description=SPDIF sink_name=SPDIF)
But just in case, I tried changing default-sample-rate = 48000 in daemon.conf.
The error I
.0pointer.de
Sent: Sun, 11 July, 2010 6:47:14
Subject: Re: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support
On Sat, 2010-07-10 at 15:40 +, Michael Rans wrote:
Regarding AC3 encoding in Pulseaudio - it would be better because at
the moment switching between stereo and A52 is not possible (ie
On Sun, 2010-07-11 at 08:43 +, Michael Rans wrote:
At the moment I can switch between A52 and stereo SPDIF but it
requires file editing and restarting Pulseaudio.
1. I haven't tried the new profiles yet - does this mean with the
profiles in a GUI, I would be able to switch from A52
.
From: Tanu Kaskinen ta...@iki.fi
To: pulseaudio-discuss@mail.0pointer.de
Sent: Sun, 11 July, 2010 7:48:15
Subject: Re: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support
On Sun, 2010-07-11 at 09:10 +0300, Tanu Kaskinen wrote:
On Sat, 2010-07-10 at 13:24 +, Michael Rans wrote:
I
,
Mike
From: Tanu Kaskinen ta...@iki.fi
To: pulseaudio-discuss@mail.0pointer.de
Sent: Sun, 11 July, 2010 12:23:25
Subject: Re: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support
On Sun, 2010-07-11 at 09:26 +, Michael Rans wrote:
That's the the problem
(). Aborting.
Assuming this is not just my system's problem, this would be why a Pulseaudio
A52 plugin would be better.
Cheers,
Mike
From: Michael Rans mcar...@yahoo.co.uk
To: General PulseAudio Discussion pulseaudio-discuss@mail.0pointer.de
Sent: Sun, 11 July, 2010 18
in Pulseaudio with
switchable channel maps so that there's one sink.
I'll see how much further I can get with this.
Cheers,
Mike
From: Michael Rans mcar...@yahoo.co.uk
To: General PulseAudio Discussion pulseaudio-discuss@mail.0pointer.de
Sent: Sun, 11 July
Finally I got it all working!
These are the steps on Ubuntu Lucid 10.04 LTS:
1. Open from Pulse source code: src/modules/alsa/alsa-sink.c
2. Replace: pa_sink_set_max_rewind(u-sink, u-hwbuf_size); with:
if(strcmp(u-device_name, a52) == 0) {
pa_sink_set_max_rewind(u-sink, 0);
On Sun, 2010-07-11 at 19:25 +, Michael Rans wrote:
Frankly, I think it would be much better to have A52 in Pulseaudio
with switchable channel maps so that there's one sink.
Why is it so important to have only one sink? What's wrong with changing
profiles?
--
Tanu Kaskinen
Cool - I'm glad you got rid of the a52 string check hack.
I didn't have the line pa_sink_set_max_rewind_within_thread(u-sink,
u-hwbuf_size);
I guess the version of Pulseaudio source code in Lucid is much older than yours?
Anyway I did have the line with pa_sink_set_max_request_within_thread so
You're welcome.
This may be an obvious question, but what is the
@args.0 {
type integer
}
for?
Is that what you meant by Adding the argument removes the need to exit the
profile. and if you did, I didn't understand at what point I had to exit the
profile. Can you explain? Sorry if
# Encode AC3 - Directly on hardware
# with Rate Converter to 48kHz, needed for some applications
pcm.a52 {
@args [ CARD ]
@args.CARD {
type integer
}
type rate
slave {
pcm {
type a52
bitrate 448
channels 6
card
Strange - $CARD really won't work on my setup - it fails to create an a52
device. Can anyone else get it working? On Lucid?
I tried it in ~/.asoundrc, /etc/asound.conf and /usr/share/alsa/alsa.conf and
no
luck.
Cheers,
Mike
From: pl bossart
I have a theory that the $CARD doesn't work for me and may not for others
because of the way in which the %f in a52:%f is generated.
Would I be right in saying that %f is incremented for each source or sink ie.
you cannot have both iec958:0 and a52:0?
I see in my logs:
I: alsa-source.c:
bossart bossart.nos...@gmail.com
To: General PulseAudio Discussion pulseaudio-discuss@mail.0pointer.de
Sent: Wed, 14 July, 2010 22:30:15
Subject: Re: [pulseaudio-discuss] Cannot have iec958:0 and a52:0 simultaneously?
On Wed, Jul 14, 2010 at 2:10 PM, Michael Rans mcar...@yahoo.co.uk wrote:
I have
There's a 'Hardware' tab in g-v-c where you can select a profile for
each available card (be it a sound card, a headset, usb speakers or a
webcam).
System-Preferences-Sound in Lucid has Hardware tab with profiles so I think
it
is the Gnome volume control you talk about.
And even better it has
Oh no - not another Linux sound server. I think in the Linux audio world there
must be too many of the kind of people who believe in directional speaker
cables
:-)
From: Colin Guthrie gm...@colin.guthr.ie
To: pulseaudio-discuss@mail.0pointer.de
Cc:
You might want to look at
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/348353/comments/35 -
Danny Wood packaged up the steps I described in the previous comment in a PPA
which would save you recompiling Pulseaudio. The only thing missing from it is
the a52 Alsa plugin.
Cheers,
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