[USB-Audio - MAYA44 USB, playback] volume slider problem

The volume slider does not allow me to slightly adjust the volume. The volume is too low/barely noticable over nearly the whole slider range. When moved into the end position (max) the volume goes up dramatically in the last step. So volume adjustment is not smooth but jumping from too low to max in one step of the slider. I can adjust the volume in the software/player I use but it does not really work with the system volume adjustment.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: romy 2263 F.... pulseaudio
 /dev/snd/controlC0: romy 2263 F.... pulseaudio
 /dev/snd/controlC1: romy 2263 F.... pulseaudio
 /dev/snd/pcmC1D0p: romy 2263 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfbaf0000 irq 48'
   Mixer name : 'Realtek ALC889A'
   Components : 'HDA:10ec0885,18490890,00100101'
   Controls : 46
   Simple ctrls : 22
Card1.Amixer.info:
 Card hw:1 'USB'/'AUDIOTRAK MAYA44 USB at usb-0000:00:1a.0-1, full speed'
   Mixer name : 'USB Mixer'
   Components : 'USB0a92:0091'
   Controls : 6
   Simple ctrls : 3
Card2.Amixer.info:
 Card hw:2 'Generic'/'HD-Audio Generic at 0xfbefc000 irq 49'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100200'
   Controls : 6
   Simple ctrls : 1
Card2.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Tue May 15 20:08:05 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Redwood HDMI Audio [Radeon HD 5000 Series] - HD-Audio Generic
Symptom_Type: Volume slider, or mixer problems
Title: [USB-Audio - MAYA44 USB, playback] volume slider problem
UpgradeStatus: Upgraded to precise on 2012-05-15 (0 days ago)
dmi.bios.date: 04/09/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.30
dmi.board.name: X58 Extreme
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.30:bd04/09/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX58Extreme:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.