[alsa-devel] Shared volume control again
Hi,
thinking of the problem about shared volume controls again, I stumbled on a case where your suggested solution doesn't work well. Namely, when a headphone volume is shared for two headphones (one on the laptop and one on the dock), how should it be named? One is "Headphone" and another is "Dock Headphone". That's a bit tricky.
So, in the end, we need the mapping representation somehow more explicitly than the control name.
Thoughts?
Takashi
On 2014-10-29 18:02, Takashi Iwai wrote:
Hi,
thinking of the problem about shared volume controls again, I stumbled on a case where your suggested solution doesn't work well. Namely, when a headphone volume is shared for two headphones (one on the laptop and one on the dock), how should it be named? One is "Headphone" and another is "Dock Headphone". That's a bit tricky.
So, in the end, we need the mapping representation somehow more explicitly than the control name.
Thoughts?
In practice, it seems like we more often than not share DAC for all headphones. Also it is very common today that a jack called "Front Headphone" has a volume control called only "Headphone".
That's the status quo. As a result we have only one headphone path in PulseAudio for all types of headphones. And it kind of works as long as we *always* share DAC between the different headphones. And when we don't, they're usually both controlled by a vmaster anyway. I haven't seen anything else recently, are you planning to make "headphone" and "dock headphone" have separate volume controls?
At Wed, 29 Oct 2014 18:12:14 +0100, David Henningsson wrote:
On 2014-10-29 18:02, Takashi Iwai wrote:
Hi,
thinking of the problem about shared volume controls again, I stumbled on a case where your suggested solution doesn't work well. Namely, when a headphone volume is shared for two headphones (one on the laptop and one on the dock), how should it be named? One is "Headphone" and another is "Dock Headphone". That's a bit tricky.
So, in the end, we need the mapping representation somehow more explicitly than the control name.
Thoughts?
In practice, it seems like we more often than not share DAC for all headphones. Also it is very common today that a jack called "Front Headphone" has a volume control called only "Headphone".
That's the status quo. As a result we have only one headphone path in PulseAudio for all types of headphones.
OK, so "Headphone" volume should be handled by both "Headphone Jack" and "Dock Headphone Jack" detections? Then it's fine. I thought this wasn't the case (from my memory dealing with an old bug report).
And it kind of works as long as we *always* share DAC between the different headphones. And when we don't, they're usually both controlled by a vmaster anyway. I haven't seen anything else recently, are you planning to make "headphone" and "dock headphone" have separate volume controls?
No, splitting is impossible with vmaster.
thanks,
Takashi
On 2014-10-29 18:17, Takashi Iwai wrote:
At Wed, 29 Oct 2014 18:12:14 +0100, David Henningsson wrote:
On 2014-10-29 18:02, Takashi Iwai wrote:
Hi,
thinking of the problem about shared volume controls again, I stumbled on a case where your suggested solution doesn't work well. Namely, when a headphone volume is shared for two headphones (one on the laptop and one on the dock), how should it be named? One is "Headphone" and another is "Dock Headphone". That's a bit tricky.
So, in the end, we need the mapping representation somehow more explicitly than the control name.
Thoughts?
In practice, it seems like we more often than not share DAC for all headphones. Also it is very common today that a jack called "Front Headphone" has a volume control called only "Headphone".
That's the status quo. As a result we have only one headphone path in PulseAudio for all types of headphones.
OK, so "Headphone" volume should be handled by both "Headphone Jack" and "Dock Headphone Jack" detections? Then it's fine. I thought this wasn't the case (from my memory dealing with an old bug report).
Yes. The "Dock Headphone Jack" name was added quite recently though, so it's only in git master right now.
thinking of the problem about shared volume controls again, I stumbled on a case where your suggested solution doesn't work well. Namely, when a headphone volume is shared for two headphones (one on the laptop and one on the dock), how should it be named? One is "Headphone" and another is "Dock Headphone". That's a bit tricky.
So, in the end, we need the mapping representation somehow more explicitly than the control name.
Thoughts?
In practice, it seems like we more often than not share DAC for all
headphones. Also it is very common today that a jack called "Front Headphone" has a volume control called only "Headphone".
That's the status quo. As a result we have only one headphone path in
PulseAudio for all types of headphones.
And it kind of works as long as we *always* share DAC between the
different headphones.
it is unlikely that dual headphone jacks share DAC on those Dell XPS notebook with 8 channels hda codec
Surround 40 should not be supported when headphone and dock headphone always share DAC
Are there any difference when dock station has dock line out instead of dock headphone?
Another ad hoc case is asus g75 with vt1802 which have speaker and subwoober, headohone and speaker share DAC so that the subwoofer can have volume control
For Dell alienware notebook with alc668, headset and headphone jack, mic jack internal 2.1 speaker
User expect the headset jack default to be used as headset since the notebook has another headphone jack
On 10/30/2014 09:18 AM, Raymond Yau wrote:
thinking of the problem about shared volume controls again, I stumbled on a case where your suggested solution doesn't work well. Namely, when a headphone volume is shared for two headphones (one on the laptop and one on the dock), how should it be named? One is "Headphone" and another is "Dock Headphone". That's a bit tricky.
So, in the end, we need the mapping representation somehow more explicitly than the control name.
Thoughts?
In practice, it seems like we more often than not share DAC for all
headphones. Also it is very common today that a jack called "Front Headphone" has a volume control called only "Headphone".
That's the status quo. As a result we have only one headphone path in
PulseAudio for all types of headphones.
And it kind of works as long as we *always* share DAC between the
different headphones.
it is unlikely that dual headphone jacks share DAC on those Dell XPS notebook with 8 channels hda codec
Surround 40 should not be supported when headphone and dock headphone always share DAC
Are there any difference when dock station has dock line out instead of dock headphone?
Another ad hoc case is asus g75 with vt1802 which have speaker and subwoober, headohone and speaker share DAC so that the subwoofer can have volume control
Hi Raymond,
It seems like you are familiar with hardware configuration for different machines, BTW do you know any Lenovo/Dell/HP laptops which have subwoofer on them?
Thanks, Hui.
For Dell alienware notebook with alc668, headset and headphone jack, mic jack internal 2.1 speaker
User expect the headset jack default to be used as headset since the notebook has another headphone jack _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
BTW do you know any Lenovo/Dell/HP laptops which have subwoofer on them?
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/sound/pci/h...
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1302090
Those dell alienware 14,17 and 18
On 10/30/2014 11:33 AM, Raymond Yau wrote:
BTW do you know any Lenovo/Dell/HP laptops which have subwoofer on them?
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/sound/pci/h...
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1302090
Those dell alienware 14,17 and 18
Got it, thanks.
participants (4)
-
David Henningsson -
Hui Wang -
Raymond Yau -
Takashi Iwai