occasional dropout with L22

I am using an L22 connected to an Aurora 8 via Lstream. My motherboard is an Asus P8Z68 Deluxe. Occasionally, when using ASIO (SW synthesizers both standalone and within Sonar X1) the Lynx mixer panel indicates a dropout (sometimes audible) on all of the active channels. The applications can run for an hour or two without this happening, and sometimes a single dropout (on all channels) occurs withing 30 seconds of beginning the application.

dpclat.exe indicates no excessive latency when this happens. In fact, the maximum latched latency indicated is 400us, sometimes even no higher than ~150us when the dropout occurs.

ASIO is configured for a a 256 sample buffer, 16-bits, 44.1kHz. Selecting the L22 double-buffer feature has no effect.

Power saving has no effect, and it is currently set in maximum. Disabling BIOS Ai-Twesker Speedstep Technology and Turbo has no effect.

The L22 version information is as follows:

Lynx Mixer Version: 2.00 Build 019
Build Date: May  4 2011

LynxWDM.Dll Version: 2.00 Build 019
LynxV264.Sys Version: 2.00 Build 019

Firmware Version: 9.0   Date: Mar 15, 2004
LStream 1: Aurora 8

VER_PLATFORM_WIN32_NT 6.1 Build 7601 Service Pack 1
Processor: 8 Intel Level 6 Rev 2a07
Memory: Phys 4194303 Avail 4194303 Page 4194303 Avail 4194303

Any advice?

thanks

Keith

Good to hear, Keith, thank you for the update. Please let us know if there is any change...

Any insights?

thanks

Keith

David:

No, I have not. I'll give that a try.

thanks

Keith

Hi Keith,
As to the latency difference reported, I think in one instance they're referring to single direction latency, and in the other (12ms) they're referring to round trip. That's what it seems like at least. ASIO apps should all get the same numbers generated by the driver.

With the issue you're describing, I'm wondering if you have "release ASIO driver in background" selected in Sonar. It may be called something different, but it basically halts the audio engine when the app is minimized.

Also, you might try having the L22 NOT be the default audio device for Windows and see if that makes a difference.

In the Lynx Mixer under Advanced Settings, you could try turning MRM (memory read multiple) OFF.

I think I have found a solution, and it was counter intuitive (at least to me). I reduced the ASIO buffer from 256 to 64 samples, with double-buffering enabled, and playback seems to work fin now. I haven't tried recording.

Incidentally, before I made this change, I noticed that the output from the L22 exhibited only clocks, whereas output from the aurora 8 exhibited much more audible and sustained disruptions.

Keith

The dropouts are not completely resolved. However, I have noticed that they occur when using Cakewalk SW synthesizers Rapture and Z3TA+2. When I use my other SW synthesizers in a Sonar X1 project, I do not observe dropouts:

Alchemy (64-bit)
Korg Legacy and log and digital editions (32-but, using jbridge)
Linnplug RMV (64-bit)

I have been doing some more testing. The dropouts occur with other 64-bit synths as well for programs that have a long sustain or decay interval. I have not tried 32-bit synths yet. Could my problem be my non-native PCI interface?