[alsa-devel] Low volume ad1983
sam chan wrote: i'm having a problem with sound volume being too low. i **think** it's due to the levels of my channel map being too low.....
The channel map specifies which channel goes to which physical output.
my alsa-info... http://www.alsa-project.org/db/?f=3ba6278df3c6c4abe5196ad37f8015de7223ca8e
Simple mixer control 'Master',0 Mono: Playback 37 [59%] [-39.00dB] [on]
That is pretty low.
Simple mixer control 'Loopback Mixing',0 Item0: 'Enabled'
Why is this enabled?
seem driver bug
1) Should the volume control and playback switch of line out be named as Front instead of PCM ?
Node 0x05 [Pin Complex] wcaps 0x400185: Stereo Amp-Out Control: name="PCM Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="PCM Playback Switch", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="Line Out Jack", index=0, device=0 Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 Amp-Out vals: [0x23 0x23] Pincap 0x00000017: OUT Detect Trigger ImpSense Pin Default 0x01014010: [Jack] Line Out at Ext Rear Conn = 1/8, Color = Green DefAssociation = 0x1, Sequence = 0x0
2) dB max of virtual master playback volume is different from the slave when slave dbmax of slaves > 0
control.1 { iface MIXER name 'PCM Playback Volume' value.0 61 value.1 61 comment { access 'read write' type INTEGER count 2 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 dbvalue.1 0 } } control.3 { iface MIXER name 'Headphone Playback Volume' value.0 61 value.1 61 comment { access 'read write' type INTEGER count 2 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 dbvalue.1 0 } } control.5 { iface MIXER name 'Speaker Playback Volume' value 61 comment { access 'read write' type INTEGER count 1 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 } } control.17 { iface MIXER name 'Master Playback Volume' value 37 comment { access 'read write' type INTEGER count 1 range '0 - 63' dbmin -9450 dbmax 0 dbvalue.0 -3900 } }
At Thu, 13 Mar 2014 21:20:46 +0800, Raymond Yau wrote:
sam chan wrote: i'm having a problem with sound volume being too low. i **think** it's due to the levels of my channel map being too low.....
The channel map specifies which channel goes to which physical output.
my alsa-info... http://www.alsa-project.org/db/?f=3ba6278df3c6c4abe5196ad37f8015de7223ca8e
Simple mixer control 'Master',0 Mono: Playback 37 [59%] [-39.00dB] [on]
That is pretty low.
Simple mixer control 'Loopback Mixing',0 Item0: 'Enabled'
Why is this enabled?
seem driver bug
Not really.
- Should the volume control and playback switch of line out be named
as Front instead of PCM ?
Depends. For multi-channel setup, we take "Front", but in other cases, it may become "PCM". It's suboptimal, indeed, and we need a better naming rule for the shared volume control.
Node 0x05 [Pin Complex] wcaps 0x400185: Stereo Amp-Out Control: name="PCM Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="PCM Playback Switch", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="Line Out Jack", index=0, device=0 Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 Amp-Out vals: [0x23 0x23] Pincap 0x00000017: OUT Detect Trigger ImpSense Pin Default 0x01014010: [Jack] Line Out at Ext Rear Conn = 1/8, Color = Green DefAssociation = 0x1, Sequence = 0x0
- dB max of virtual master playback volume is different from the
slave when slave dbmax of slaves > 0
It's the designed behavior. The Master volume is an offset applied to the slave value, thus it's always up to 0dB. The lowest value is somewhat bogus, but it's anyway cut off under 0.
Takashi
control.1 { iface MIXER name 'PCM Playback Volume' value.0 61 value.1 61 comment { access 'read write' type INTEGER count 2 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 dbvalue.1 0 } } control.3 { iface MIXER name 'Headphone Playback Volume' value.0 61 value.1 61 comment { access 'read write' type INTEGER count 2 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 dbvalue.1 0 } } control.5 { iface MIXER name 'Speaker Playback Volume' value 61 comment { access 'read write' type INTEGER count 1 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 } } control.17 { iface MIXER name 'Master Playback Volume' value 37 comment { access 'read write' type INTEGER count 1 range '0 - 63' dbmin -9450 dbmax 0 dbvalue.0 -3900 } }
On Thu, 13 Mar 2014, Takashi Iwai wrote:
At Thu, 13 Mar 2014 21:20:46 +0800, Raymond Yau wrote:
sam chan wrote: i'm having a problem with sound volume being too low. i **think** it's due to the levels of my channel map being too low.....
The channel map specifies which channel goes to which physical output.
ok. i thought the values were a range, because the controls makes it look like that. maybe these ought to be changed.
my alsa-info... http://www.alsa-project.org/db/?f=3ba6278df3c6c4abe5196ad37f8015de7223ca8e
Simple mixer control 'Master',0 Mono: Playback 37 [59%] [-39.00dB] [on]
That is pretty low.
i just use the Master switch as my main volume control. i have PCM and other switches at 0 dB.
just to clarify the problem, it's not that i can't get it loud enough. it's that it's relatively quite low compared to Windows. in Windows, i barely have to up the volume to get the same audible level. the speakers' physical nob is the same for both instances.
Simple mixer control 'Loopback Mixing',0 Item0: 'Enabled'
Why is this enabled?
seem driver bug
Not really.
apparently, this is the only way i can get the Mic to work for capture/recording. but this a seperate issue.
thanks, sam
- Should the volume control and playback switch of line out be named
as Front instead of PCM ?
Depends. For multi-channel setup, we take "Front", but in other cases, it may become "PCM". It's suboptimal, indeed, and we need a better naming rule for the shared volume control.
Node 0x05 [Pin Complex] wcaps 0x400185: Stereo Amp-Out Control: name="PCM Playback Volume", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="PCM Playback Switch", index=0, device=0 ControlAmp: chs=3, dir=Out, idx=0, ofs=0 Control: name="Line Out Jack", index=0, device=0 Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 Amp-Out vals: [0x23 0x23] Pincap 0x00000017: OUT Detect Trigger ImpSense Pin Default 0x01014010: [Jack] Line Out at Ext Rear Conn = 1/8, Color = Green DefAssociation = 0x1, Sequence = 0x0
- dB max of virtual master playback volume is different from the
slave when slave dbmax of slaves > 0
It's the designed behavior. The Master volume is an offset applied to the slave value, thus it's always up to 0dB. The lowest value is somewhat bogus, but it's anyway cut off under 0.
Takashi
control.1 { iface MIXER name 'PCM Playback Volume' value.0 61 value.1 61 comment { access 'read write' type INTEGER count 2 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 dbvalue.1 0 } } control.3 { iface MIXER name 'Headphone Playback Volume' value.0 61 value.1 61 comment { access 'read write' type INTEGER count 2 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 dbvalue.1 0 } } control.5 { iface MIXER name 'Speaker Playback Volume' value 61 comment { access 'read write' type INTEGER count 1 range '0 - 63' dbmin -9150 dbmax 300 dbvalue.0 0 } } control.17 { iface MIXER name 'Master Playback Volume' value 37 comment { access 'read write' type INTEGER count 1 range '0 - 63' dbmin -9450 dbmax 0 dbvalue.0 -3900 } }
2014-03-14 1:48 GMT+08:00 sam chan schan@cs.ucr.edu:
On Thu, 13 Mar 2014, Takashi Iwai wrote:
At Thu, 13 Mar 2014 21:20:46 +0800,
Raymond Yau wrote:
sam chan wrote:
i'm having a problem with sound volume being too low. i **think** it's due to the levels of my channel map being too low.....
The channel map specifies which channel goes to which
physical output.
ok. i thought the values were a range, because the controls makes it look like that. maybe these ought to be changed.
my alsa-info...
http://www.alsa-project.org/db/?f=3ba6278df3c6c4abe5196ad37f8015 de7223ca8e
Simple mixer control 'Master',0
Mono: Playback 37 [59%] [-39.00dB] [on]
That is pretty low.
i just use the Master switch as my main volume control. i have PCM and other switches at 0 dB.
just to clarify the problem, it's not that i can't get it loud enough. it's that it's relatively quite low compared to Windows. in Windows, i barely have to up the volume to get the same audible level. the speakers' physical nob is the same for both instances.
Node 0x11 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out Amp-Out caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1 Amp-Out vals: [0x17 0x17] Connection: 1 0x03
when loopback mixing is enabled, the current driver remove the previous "PCM playback volume" and set the amp at 0dB which is 12 dB lower than the previous version
participants (3)
-
Raymond Yau -
sam chan -
Takashi Iwai