Windows – Can anyone explain this weird sound-card glitch? (already fixed, but not explained)

driverssound cardwindows 7

I have a recent (AMD Athlon II X4 645 based) PC. Although the motherboard has integrated sound, I use an ancient-but-still-pretty-good Creative Soundblaster Audigy Platinum Ex. I dual boot Windows 7 and Windows XP at the moment.

Today, about an hour ago, using Windows 7, I noticed that I wasn't getting any sound when I started a game of Oolite. I know the sound was working around an hour before that. Not sure if I rebooted in-between or not, but I had the speakers switched off for a lot of that time, so didn't notice exactly when the noises stopped.

At that point, I had only used Windows 7 all day (I haven't allowed XP on the internet for a few years now). There were no driver updates in this time, nor any settings changes. The most recent drivers for this card were released in 2010 IIRC. About all I've done today is browse a few web sites, watch a couple of videos in VLC, and update some backups on an external hard drive.

I checked the speakers and cable, and the state of the sound card and drive in the device manager, and of course the volume control. Everything seemed fine. I thought maybe the old card had failed.

But when I rebooted from Windows 7 to XP as a final check, all the sound was fine. I rebooted back to Windows 7 again and the sound was dead again.

The fix was simple enough in the end. The driver executable for the sound card (SBAX_PCDRV_LB_2_18_0017.exe) offers to remove existing drivers if they're found, so I ran it once to remove the drivers, rebooted, then ran it again to reinstall them and rebooted again. All sound is now fine.

But this isn't very satisfying. Obviously reinstalling (the exact same version of) the driver has reset some setting that had got broken, but ideally I'd like to know what the cause was so that I can prevent it happening again.

Any ideas?


The most recent drivers for this soundcard have turned out to be a bit buggy. I only got this particular glitch a couple of times, but I found a much bigger problem when I tried to use a microphone in Windows 7 64-bit. Basically, chunks were missing from the audio waveform, giving the impression of one of three or four buffers being wiped to all zeros every time it's used, which is several times per second recording 48KHz.

My final solution was to give up on that soundcard. I'm currently mostly using motherboard HD audio, though I also have a USB SoundBlaster Audigy 2 NX which is slightly less obsolete and doesn't have the same driver issues (but also doesn't have MIDI or firewire ports).

Best Answer

  • Is the on-board sound still enabled (there is usually an option for this in the motherboard's BIOS). If so then Windows7 could have just decided that it should be the default sound device instead of the add-on card. I don't run Windows 7 anywhere, but I have certainly seen that behaviour somewhat randomly with Windows XP.

    The sound was probably working, but playing through the on-board device which probably didn't have any speakers plugged into it so you'd not notice.

    Reinstalling the device drives would solve this, if it was indeed your issue, because installing such drivers tends to include setting the "new" device as the system default as the last step of the install. You can check and change the default audio device yourself in one of the control panel areas (I couldn't tell you where under Windows 7, but it should be something not too dissimilar to XP where it is found under "sounds and audio devices" in Control Panel and can also be accessed from the right-click menu on the volume control in the task tray).

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