[alsa-devel] maestro3 & es1988: mic range too low
ikke
ikke at iki.fi
Tue Aug 19 07:03:14 CEST 2008
On Mon, Aug 18, 2008 at 3:42 PM, Takashi Iwai <tiwai at suse.de> wrote:
> At Mon, 18 Aug 2008 15:28:00 +0300,
> Ilkka Tengvall wrote:
>>
>> >> the reasoning for the original patch sounds reasonable. The
>> >> mic volume is tunable, only at the very low range. I recall the laptop
>> >> came with Win98, and there was no problem then with the sound -> not a
>> >> HW problem. I have never got this laptop mic working with linux, so
>> >> this is not anything that broke recently. I see there is
>> >> check_volume_resolution function which tries to guess some of the
>> >> register ranges, but maybe it get's it wrong with this HW.
>> >
>> > Maybe, maybe not. You should check rather ac97 registers in
>> > /proc/asound/card0/codec97#0/ac97#0-0+regs. If build with
>> > CONFIG_SND_DEBUG=y, you can write to the register directly, too.
>> > See Documentaiton[/sound/alsa]/Procfile.txt.
>> >
>>
>> I checked this file. It seems it gets the regs right for the mic
>> (range 0x1f). The capture range is 0xf. I don't have the specs to
>> compare it against, so I assume there is nothing to do more here.
>
> Which registers, exactly?
The ones affected by changing mic volume and capture in alsamixer,
those I that I pasted the diffs of previously. In alsamixer it has
slider for mic volume, and capture volume. And mic can be set as
capture device. In code (which the patch touched) it speaks about "Mic
Capture Volume", that made me think it would affect the volume used
for capturing (recording?) mic.
ac97_codec.c:
AC97_SINGLE("Mic Capture Switch", AC97_REC_GAIN_MIC, 15, 1, 1),
AC97_SINGLE("Mic Capture Volume", AC97_REC_GAIN_MIC, 0, 15, 0)
That is 4 bits (15, f), not 5 bits (31, 1f). But if this is really
only volume control for mic playback, not capture, then I assume it
doesn't matter. Could you please still confirm this?
>> It seems mic value decreases while going up to full, where as capture
>> increases.
>
> I guess the former one is the mic loopback volume (attenuation), so no
> wonder it behaves so.
>
>> Another difference is maybe stereo / mono related, the
>> capture changes both bytes whereas mic only the other one. Also one
>> thing, should the mic level be around 0x40 - 0x5f, not 0x0 - 0x1f.
>
> The bit 0x40 indicates the mic boost +20dB.
>
Thanks for the explanation,
ikke
I still attach here the all ac97 regs dump, ac97info from same dir and
amixer dump:
ac97#0-0+regs
---------------------
0:00 = 3e80
0:02 = 0606
0:04 = 0000
0:06 = 0000
0:08 = 0000
0:0a = 0000
0:0c = 8000
0:0e = 0040
0:10 = 0000
0:12 = 0000
0:14 = 0000
0:16 = 0000
0:18 = 0000
0:1a = 0000
0:1c = 0f0f
0:1e = 0000
0:20 = 0000
0:22 = 0000
0:24 = 0000
0:26 = 800f
0:28 = 0002
0:2a = 0000
0:2c = 0000
0:2e = 0000
0:30 = 0000
0:32 = 0000
0:34 = 0000
0:36 = 0000
0:38 = 0000
0:3a = 0000
0:3c = 0000
0:3e = 0000
0:40 = 0000
0:42 = 0000
0:44 = 0000
0:46 = 0000
0:48 = 0000
0:4a = 0000
0:4c = 0000
0:4e = 0000
0:50 = 0000
0:52 = 0000
0:54 = 0000
0:56 = 0000
0:58 = 0000
0:5a = 0000
0:5c = 0000
0:5e = 0000
0:60 = 0000
0:62 = 0000
0:64 = 0000
0:66 = 0000
0:68 = 0000
0:6a = 0000
0:6c = 0000
0:6e = 0000
0:70 = 0000
0:72 = 0000
0:74 = 0000
0:76 = 0000
0:78 = 0000
0:7a = 0000
0:7c = 4583
0:7e = 8308
---------------------
ac97#0-0
---------------------
0-0/0: ESS Technology ESS1988
PCI Subsys Vendor: 0x0000
PCI Subsys Device: 0x0000
Capabilities :
DAC resolution : 20-bit
ADC resolution : 20-bit
3D enhancement : ESS Technology Stereo Enhancement
Current setup
Mic gain : +20dB [+20dB]
POP path : pre 3D
Sim. stereo : off
3D enhancement : off
Loudness : off
Mono output : MIX
Mic select : Mic1
ADC/DAC loopback : off
Double rate slots: 10/11
Extended ID : codec=0 rev=0 DSA=0 DRA
Extended status :
---------------------
amixer
---------------------
0-0/0: ESS Technology ESS1988
PCI Subsys Vendor: 0x0000
PCI Subsys Device: 0x0000
Capabilities :
DAC resolution : 20-bit
ADC resolution : 20-bit
3D enhancement : ESS Technology Stereo Enhancement
Current setup
Mic gain : +20dB [+20dB]
POP path : pre 3D
Sim. stereo : off
3D enhancement : off
Loudness : off
Mono output : MIX
Mic select : Mic1
ADC/DAC loopback : off
Double rate slots: 10/11
Extended ID : codec=0 rev=0 DSA=0 DRA
Extended status :
kaarina at kannettava:~$ cat /tmp/amixer
Simple mixer control 'Master',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 25 [81%] [-9.00dB] [on]
Front Right: Playback 25 [81%] [-9.00dB] [on]
Simple mixer control 'Master Mono',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [0.00dB] [on]
Simple mixer control '3D Control - Center',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 15 [100%]
Simple mixer control '3D Control - Depth',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 15 [100%]
Simple mixer control 'PCM',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [12.00dB] [on]
Front Right: Playback 31 [100%] [12.00dB] [on]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 31 [100%] [12.00dB] [on] Capture [off]
Front Right: Playback 31 [100%] [12.00dB] [on] Capture [off]
Simple mixer control 'CD',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 31 [100%] [12.00dB] [on] Capture [off]
Front Right: Playback 31 [100%] [12.00dB] [on] Capture [off]
Simple mixer control 'Mic',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
cswitch-exclusive
Capture exclusive group: 0
Playback channels: Mono
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [12.00dB] [on]
Front Left: Capture [on]
Front Right: Capture [on]
Simple mixer control 'Mic Boost (+20dB)',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Mic Select',0
Capabilities: enum
Items: 'Mic1' 'Mic2'
Item0: 'Mic1'
Simple mixer control 'Video',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Phone',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
cswitch-exclusive
Capture exclusive group: 0
Playback channels: Mono
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [12.00dB] [off]
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'PC Speaker',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 15
Mono: Playback 15 [100%] [0.00dB] [on]
Simple mixer control 'Aux',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Mono Output Select',0
Capabilities: enum
Items: 'Mix' 'Mic'
Item0: 'Mix'
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch cswitch-joined
Capture channels: Front Left - Front Right
Limits: Capture 0 - 15
Front Left: Capture 15 [100%] [22.50dB] [on]
Front Right: Capture 15 [100%] [22.50dB] [on]
Simple mixer control 'Mix',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Mix Mono',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'External Amplifier',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
---------------------
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