Glitches

cjk32 · Nov 4, 2004, 02:53 AM

Hello,

I'm having trouble with glitches in sound reproduction from an Audigy 2 card for any form of digital output. I hear occasional pops and crackles when the system is sitting idle, with none of the voices shown as red (ie open) in the mixer. The peak meter will record peaks of varying amplitudes, and using sound recording software, with 'wave' as the only recording source, these glitches can be seen to be single, random valued samples. I believe that the error is occurring very early on, as a peak meter connected directly FXBus0,1 will also record peaks corresponding to these glitches.

It is interesting to note that the effect can be much worse when actually playing back audio, for example, with media player. It is particularly bad, when after a sufficient number of 'Stop' 'Play' cycles, the voice in use has cycled back to the first one.

Exactly the same effect is also present when playing back AC3 content, which is being passed straight out to my AV receiver for decoding. The glitches manifest themselves as occasional squeaks, and often prevent the receiver from detecting the stream correctly. If one performs a suitable number of 'Stop' 'Play' cycles as mentioned before, the sound is utterly unintelligable.

Potentially also relevant is that there is a very high noise level, ~-50dB. This is present until the Reverb Lite is disabled in the DSP, despite the fact the Reverb and Chorus are turned off in the mixer.

If anyone can advise as to what might be going on, I'd be very grateful.

Many thanks,

Chris Key

----Hardware / Software configuration---------------
Driver Name:kX Audio Driver (Debug)
Driver Date: Jul 14 2004 23:01:16
Driver Version: 5.10.00.3538 - debug
DB Name:none
SB0240 10k2 [b800]
PCI Information:
Device: 41102 Subsys: 10021102 ChipRev: 4
Card is '10k2'
Card has MPU device
Card model is '5.1'
Card is Audigy2-compatible
Card HAS AC97 codec
Codec name: SigmaTel STAC9721/23
3D Extension: SigmaTel 3D Enhancement
Codec is 2.0 compliant
Capabilities[6940] :
DAC resolutions : -16-bit- -18-bit-
ADC resolutions : -16-bit- -18-bit-
Ext Capabilities [200]: -slot/DAC mappings-
Port: b800 Irq: 0x9(9)
Playback buffer: 20a0
Record buffer: 4000
Number of AC3 buffers: 4
Tank memory: 256 kb
GSIF buffer: 256 samples
OS version: [2 5 1 Service Pack 2; 2 5 1 Service Pack 2; 156 148]
----------------------------------------------------

Nov 4, 2004, 02:53 AM	#1
cjk32 DriverHeaven Newbie Join Date: Nov 2004 Posts: 4 Rep Power: 0	Glitches Hello, I'm having trouble with glitches in sound reproduction from an Audigy 2 card for any form of digital output. I hear occasional pops and crackles when the system is sitting idle, with none of the voices shown as red (ie open) in the mixer. The peak meter will record peaks of varying amplitudes, and using sound recording software, with 'wave' as the only recording source, these glitches can be seen to be single, random valued samples. I believe that the error is occurring very early on, as a peak meter connected directly FXBus0,1 will also record peaks corresponding to these glitches. It is interesting to note that the effect can be much worse when actually playing back audio, for example, with media player. It is particularly bad, when after a sufficient number of 'Stop' 'Play' cycles, the voice in use has cycled back to the first one. Exactly the same effect is also present when playing back AC3 content, which is being passed straight out to my AV receiver for decoding. The glitches manifest themselves as occasional squeaks, and often prevent the receiver from detecting the stream correctly. If one performs a suitable number of 'Stop' 'Play' cycles as mentioned before, the sound is utterly unintelligable. Potentially also relevant is that there is a very high noise level, ~-50dB. This is present until the Reverb Lite is disabled in the DSP, despite the fact the Reverb and Chorus are turned off in the mixer. If anyone can advise as to what might be going on, I'd be very grateful. Many thanks, Chris Key ----Hardware / Software configuration--------------- Driver Name:kX Audio Driver (Debug) Driver Date: Jul 14 2004 23:01:16 Driver Version: 5.10.00.3538 - debug DB Name:none SB0240 10k2 [b800] PCI Information: Device: 41102 Subsys: 10021102 ChipRev: 4 Card is '10k2' Card has MPU device Card model is '5.1' Card is Audigy2-compatible Card HAS AC97 codec Codec name: SigmaTel STAC9721/23 3D Extension: SigmaTel 3D Enhancement Codec is 2.0 compliant Capabilities[6940] : DAC resolutions : -16-bit- -18-bit- ADC resolutions : -16-bit- -18-bit- Ext Capabilities [200]: -slot/DAC mappings- Port: b800 Irq: 0x9(9) Playback buffer: 20a0 Record buffer: 4000 Number of AC3 buffers: 4 Tank memory: 256 kb GSIF buffer: 256 samples OS version: [2 5 1 Service Pack 2; 2 5 1 Service Pack 2; 156 148] ----------------------------------------------------