I have a Audigy DE and I can't seems to control the CD audio volume. I crank
all the way up and down but the volume never change. So does the window
mixer. Is it because I connected both SPDIF and the cd audio cable to the
Audigy from the same DVD-ROM ?

I have use various player to play CD audio including the Windows Media
Player 9 RC. The master volume is fixed at 70% and I control the loudness
through my Altec Lansing 641's remote . I have tried to adjusting both the CD
audio input level and CD digital input level (even muting them) but with no
success, the volume neither decrease or increase.
I have another CDRW drive and that also have the same problem.

This is my comp. spec. if it is needed:

AMD Athlon ThunderBird 1.33Ghz
Window XP Pro SP1
ASUS A7V133-C Motherboard [ BIOS revision 1008A ]
512Mb PC133 SDRAM
Gainward Ultra/650 GF4 Ti 4200 64Mb [Det. 40.72 WHQL]
WD 80Gb Special Edition 8Mb, SEAGATE 20Gb 7200RPM, ATA 100
Creative SoundBlaster Audigy DE [.253 driver]
ASUS DVD-E616 (ASUS 16X DVD-ROM/ 48X CD-ROM)
LITE-ON 12x10x32x
Altec Lansing Select 641

if you are running windows XP you dont need a cable running from the DVD to the soundcard or board at all. in XP the sound runs thru the pci bus. try removing the cables and see if that makes a diff.

Which cable? the SPDIF one or the normal audio cable?

I would remove both as I stated earlier under XP you dont need a cable at all the sound is thru the PCI bus. but if you want to keep a cable anyway then just remove the spdif one more than likely that is the source of your problem anyway.

Neither audio cables are required. The volume level for the CD is controlled using the Wave/MP3 volume slider. The CD controls have no effect as you're not using the Analog/Digital CD inputs to hear your CD.

Then what are those Analog/Digital CD inputs used for?

I have remove both the analog and the SPDIF cable but I still can't control the CD Audio volume in the mixer.

They're just included for legacy reasons basically, that & you might be using an old OS which doesn't use digital extraction by default or something (Or for connecting to some of the other headers). Again CD Volume uses the Wave/MP3 slider in Surround Mixer.

Ok.... Thanks for the explaination TS | Thomas, now at least I know that it is not my pc that goes wrong.