--ok---I was having problems with my laptop going below 23ms latency so just built a new computer with happy specs. Latency low 5.8 now but still has slight flanging kind of sound. Audiobox 1818vsl. It is not in the recording==only the tracking. What else can it be? 

Update. I'm wrong. Even with the new computer and 16gb ram I am still at 23ms asio. The sound card doesn't seem to function on wdm and on asio below 1024 it starts snap, crackle, pop and can't raise it back to 1024samples afterwards--have to uninstall and re-install drivers.
Hmmm. Must be crappy drivers on the soundcard or a Sonar issue. 
 

Hey Michael. I've been doing some vocal tests this week and noticed the same thing. I have a Focusrite saffire 6  usb. I hope someone can shed some light on this.

do you maybe have both hardware & software mointoring enabled?

pwal, I don't.  My input monitoring is set to effects.  When I have it to the dry input, I only get the right channel.

Is your computer audio using the same output driver? On my MOTU I have my computer audio for cds and dvds playing in the drive set to 1 and 2. If I try to use 1 and 2 to record in Sonar I get the same issue. I set my Mains in Sonar to another pair, 3 and 4, and the channels input to something other than 1 and 2, the problem disappears. I use a 24io hooked to a Soundtracs Topaz 8. It has always had that issue. I don't know if it's just my rig runs that way or if anyone else has this issue. BTW, Input monitoring in the MOTU settings audio driver is muted and I still have that issue. BTW, using ASIO drivers. I have never been able to get below 20msec with multimedia or WDM drivers. ASIO allowed me to get down to 2 msec!

never mind I saw you have a nice card.....


Be sure to DL the latest driver updates for the card 

paul, I don't. My input monitoring is set to effects. When I have it to the dry input, I only get the right channel.

Um that is normal because Vocals are Mono, not Stereo. Select a a Mono Input when recording vocals.
Also , some effects are not made to be used for recording as they add latency. This is not a bug. Its an issue on how your setting it up and configuring it.
 
Cj

do you maybe have both hardware & software mointoring enabled?

That would be my guess...

Even with the new computer and 16gb ram I am still at 23ms asio. The sound card doesn't seem to function on wdm and on asio below 1024 it starts snap, crackle, pop and can't raise it back to 1024samples afterwards--have to uninstall and re-install drivers. Hmmm. Must be crappy drivers on the soundcard or a Sonar issue.

Hi Michael,


It's neither the 1818 VSL drivers nor Sonar.   
My guess is that you have the 1818 VSL plugged into a USB3 controller.
Make sure it's connected to the USB2 controller.

With a fast well-configured DAW, you can run substantial loads (glitch-free) with the 1818 VSL at a 64-sample ASIO buffer size.

Hey there. I am only beginning to touch the surface. By an act of nature I lost my whole studio and it was extensive. So, I bought a Dell XPS 702s !7" monitor (i7 QuadCore 8mb ram, 2 7200 rpm HDD in a laptop) to go with the  Presonus Audibox 1818VSL so I could get 8 pres and record drums live in a studio rental place, 20 songs, then back to my studio which is now in a different location, smaller scale but acoustically treated for everything tracking/vocals/mixing/mastering. So, the drum/bass/keyboard/upright bass went great-8 tracks=good pres (not as good as what I had but hey, I don't look as good as I used to either but still functioning.) Yea. So, I load up Omnisphere and see I'm 23ms and then start tracking guitars and its ok, but vocals I hear a light flange. Well, with my MOTU 828MKII's I don't remember ever having to be picky with anything  but here I am--trying to get to at leasr 11ms without the Rice Crispies. And then, even if I moved the ASIO back up to 1024 samples, it doesn't fix it--I have to uninstall, re-install the Presonus. SO, speed around like a mad man reading about every tweak for Windows 7/Audio/DAW/Presonus forum and get lots of answers (some downright condescending) but with the bottom line that it must be the drivers---but==then there were a lot of issues about this fine piece of Dell hardware I had too. I bought it cheap from someone leaving Tokyo. I tried WDM/ASIO4All/Legacy, etc. Powermizer, BIOS, bam didi bum. Finally, decided to make a desktop--long story about how much gear to try to replace versus economy and work. So, just get the desktop built and at 256samples my media player, sound forge peripherals are smokin' but when I installed Sonar X1DExpanded here comes the Rice Krispies again. I almost cried--maybe I did. 
  Decided I could still beat this, went to dinner, played with my big dog, couple of glasses of wine, up till late doing the whole same procedure. Yes, I did all the disables--sound card, internet, device monger (pun intended), etc. At least I have a desktop that works without snap, crackle, pop but latency the same. I thought it was running on WDM drivers at 11.6ms but it wasn't really even though I ran the wave profiler--when I opned up the 1818sl ASIO drop down box it had switched from 512 to 1024 again. 
  At least I could live that and my client coming could record--if I put enough reverb on the tracking playback that the Elvos Presley slapback echo didn't bother you. Was it latency or the card or the computer or irq or....
  So. start the day afresh, breakfast, out with the dog and the ms. and come back home and read more and find a guy who tried the WASAPI drivers and finally somebody says, "don't worry about how crappy people tell you athey are on forums and how much better ASIO is, if this works for you, then hey....
  So tried it at 5.8ms/512-/256 and its stable for the first time.
  Thank God---gigs in the morning and gigs in the night tomorrow--Maihama and Akasaka.
Cheers and nice to meet you Sidroe and all.