The calculation of the dB value depends on whether you are working with
amplitude values or power values. For power values, the formula is
10·log10(x), with x the relative power. For amplitude values, the
formula is 20·log10(x).
for DAC
log10(0.006) = -2.2218
refer to 5. FUNCTION BLOCK DIAGRAM OF CM106-F+/L+
step 0 ~ 37
volume is 0 ~ -45dB
8.2 ADC VOLUME CONTROL
step 0 ~ 15
0 ~ 22.5 dB
8.3 MIC / LINE-IN MONITOR VOLUME CONTROL
step 0 ~ 31
-33 ~ 12 dB
USB Mixer: usb_id=0x0d8c0006, ctrlif=0, ctlerr=0
Card: USB Audio at usb-0000:00:1d.1-1, full speed
Unit: 2
Control: name="PCM Capture Volume", index=0
Info: id=2, control=2, cmask=0x3, channels=2, type="S16"
Volume: min=0, max=4095, dBmin=0, dBmax=1599
Unit: 7
Control: name="PCM Capture Source", index=0
Info: id=7, control=0, cmask=0x0, channels=1, type="U8"
Volume: min=1, max=4, dBmin=0, dBmax=0
Unit: 8
Control: name="Auto Gain Control", index=0
Info: id=8, control=7, cmask=0x0, channels=1, type="BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 8
Control: name="Mic Capture Volume", index=0
Info: id=8, control=2, cmask=0x3, channels=2, type="S16"
Volume: min=0, max=4095, dBmin=0, dBmax=1599
Unit: 9
Control: name="Mic Playback Volume", index=0
Info: id=9, control=2, cmask=0x3, channels=2, type="S16"
Volume: min=0, max=8191, dBmin=0, dBmax=3199
Unit: 9
Control: name="Mic Playback Switch", index=0
Info: id=9, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 11
Control: name="Line Playback Volume", index=0
Info: id=11, control=2, cmask=0x3, channels=2, type="S16"
Volume: min=0, max=8191, dBmin=0, dBmax=3199
Unit: 11
Control: name="Line Playback Switch", index=0
Info: id=11, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 13
Control: name="Speaker Playback Volume", index=0
Info: id=13, control=2, cmask=0x0, channels=1, type="S16"
Volume: min=0, max=37, dBmin=0, dBmax=14
Unit: 13
Control: name="Speaker Playback Switch", index=0
Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
Unit: 15
Control: name="Line Capture Volume", index=0
Info: id=15, control=2, cmask=0x3, channels=2, type="S16"
Volume: min=0, max=4095, dBmin=0, dBmax=1599
Unit: 16
Control: name="IEC958 In Capture Switch", index=0
Info: id=16, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
Volume: min=0, max=1, dBmin=0, dBmax=0
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1200925
Title:
[USB-Audio - USB Audio, playback] Playback problem Playback only at
maximum level, if the volume is turned down just a little no sound is
played.
Status in “alsa-driver” package in Ubuntu:
New
Bug description:
The headphones worked with 10.04 at any volume level.
Now the headphones work only at maximum volume level (tested with 11.10,
12.04 13.04) if the volume is turned down just a little no sound is played.
lsb_release -rd:
Description: Ubuntu 12.04.2 LTS
Release: 12.04
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-49.75-generic 3.2.46
Uname: Linux 3.2.0-49-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ulrich 8418 F.... pulseaudio
/dev/snd/controlC0: ulrich 8418 F.... pulseaudio
/dev/snd/pcmC0D0c: ulrich 8418 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfd800000 irq 50'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:11060448,15585130,00100000
HDA:80862804,15585130,00100000'
Controls : 38
Simple ctrls : 20
Card1.Amixer.info:
Card hw:1 'Audio'/'USB Audio at usb-0000:00:1a.0-1.1.1, full speed'
Mixer name : 'USB Mixer'
Components : 'USB0d8c:0006'
Controls : 12
Simple ctrls : 7
Date: Sat Jul 13 15:08:49 2013
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
LANGUAGE=de_AT:de
TERM=xterm
PATH=(custom, no user)
LANG=de_AT.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Audio failed
Symptom_Card: Storm HP-USB500 5.1 Headset - USB Audio
Symptom_Type: None of the above
Title: [USB-Audio - USB Audio, playback] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/27/2010
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.asset.tag: Tag 12345
dmi.board.name: B5130M
dmi.board.vendor: CLEVO CO.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd08/27/2010:svnCLEVOCO.:pnB5130M:pvrNotApplicable:rvnCLEVOCO.:rnB5130M:rvrNotApplicable:cvnNoEnclosure:ct9:cvrN/A:
dmi.product.name: B5130M
dmi.product.version: Not Applicable
dmi.sys.vendor: CLEVO CO.
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