[alsa-devel] Low volume ad1983

[sam chan]

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





>> 1) 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
>>
>> 2) 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
>> 		}
>> 	}
>