Tascam us1641 Users read this FYI help needed please.

I also started a thread under Hardware ( where it belongs)  but no answers after a week. so please,
 if you own this unit I'm looking for some help.
Could you please reply to this thread here- much appreciated. 
http://forum.cakewalk.com/tm.aspx?m=2090754


So I needed to do a fresh OS install and I thought I'd do a little experiment with DPCLAT meter.
As I progressed through the install stages I ran the dpclat meter and took screen shots.
The computer-  Laptop 2004 Acer TM 4000. 1.7 Centrino- 2 gigs RAM.
Installed XP Pro SP 3
First shot taken after OS install, no Acer drivers yet.
17 process running in Task manager.
Hard drive has been de fragged. System restore off, System set for max performance.

 

Then I disabled Battery management in the Devise Manager




So things are looking pretty good and I haven't done anything earthshaking.
We learn here that the Battery management is bad news for latency without a doubt are you paying attention still? 




Hmm, no real difference here. Notice a spike every minute.
These are the pesky critters that most likely live in the bios somewhere and I gave up trying to kill it.
And no its not the wireless, there is no wireless going on here.
I have not installed the drivers for Wireless, LAN or on board Sound card. Bare bones.



Interesting, we now see jumping from 38ms all the way to 503 ms..

If I kill the power to the Tascam the latency goes back to 34ms.

 

i found the 1 minute spike was my wireless card. disable that in device manager and it disappears.

I just saw you mention no audio drivers installed, which I'm assuming you mean onboard sound card. This is just a reiteration of my first post. Try installing the drivers for your onboard sound card. Then with the tascam on configure windows to use onboard sound card and sonar to use tascam ASIO. Just currious what your results would be then.

Horrible in terms of before and after turning on the tascam. You really shouldn't see this difference unless there is a problem. I'm running an old machine and I get much better DPC regardless of having interface on. For me there is no difference in readout with interface on vs off.

Just noticed you have the almost the same CPU as I do on desktop..but mines the 4800+

I could not get the Tascam to work with that computer for some reason. SO I use the M-Audio Fast Track which is fine. Like I say Latency is under 20ms. Round Trip Latency is another issue which is over 20 ms at 256 samples. Cannot bring it down.
Soon I will upgrade the desktop, but the Acer is going to be around for another season or 2.
Besides I just got layed off after 12 years of service..Cut backs! I'm 57 years old with a bad knees, I guess I can go play on the Cruise Ships for $80 a day.

SO WDI,
 I enabled the onboard sound chip and nothing changed so that6 experiment failed. I've disabled it.
If you go to my thread

http://forum.cakewalk.com/tm.aspx?m=2090754

you will read of the other woes of this interface.

Please still would really like to here from other Tascam users !
but go to the Hardware thread so as to reduce clutter. thanks .

Thanks WDI, yes that's what I did and it would play MP3's from the mini jack via Media Player.
The results with the Tascam on or off stayed the same. The good news is there was no increase in latency with the on board sound card enabled. So yes you can have that configuration if you choose. I think some set ups have a conflict with clock rate or something and that's the main reason we are told to disable. I never had a problem and used to leave it enabled so I could watch movies without hooking up the interface. It would simply switch back and forth with out a problem.
I'm still waiting for another owner of the Tascam to read this and try the test. I might try using another computer but my spare is a P4 with 768 SD RAM