Loss of input signal

I have started using my DAW again after a hiatus. Same DAW, same laptop and so on. I recorded the guitar track fine but when I came to do the vocals the recording stops part way through a take.
More correctly, the recording continues for the whole take but when you get to the end there’s no waveform. If you rewind you see that the waveform stops part way through like there’s loss of signal. It’s recorded all the way through but has recorded silence for the latter portion of the take. It’s not stutering, it stays at zero after the change.

If I start recording a fresh take straight away it’s fine again without having to reset anything. Like nothing happened. But the signal is lost again after a short duration.

Does anyone have any clues as to what might be causing this?
It’s not the phantom power turning off.
It’s not a dodgy lead. It feels like a loss of signal.

Additionally I have noticed that, when playing back the project I hear a glitch occasionally. Like a hiccup, tick or pop. It’s not a recorded glitch but a playback glitch that does not necessarily repeat at the same location in the track. When observing the VST performance meter, the glitch coincides with a spurious peak on the VST meter’s average load indicator. The peak does not add to the sound but replaces it. so the playback is interrupted for 1/10 of a second or less,. The peak is not just a regular anticipated peak in the audio but a sudden unrelated spike at random. I don’t know if this is related to the above problem because it is momentary yet the above problem persists beyond any trigger that might be present.

Cubase LE AI Elements 7
Steinberg UR22
Thank you.

Specs on the laptop? Is it Windows? Have you updated the OS?

Hi Bob
It’s now windows 10. It was 8.1 before.
Laptop is Toshiba Satellite C50D-B-12C.
It can be a bit slower now win10.

That is most likely a big factor.

This suggests something else is going on with your computer that’s getting in the way of audio process.
Make sure you’re running it on high performance power mode, disable usb selective suspend and the power management of any usb hub in device manager.

See if that helps, if not run latencymon software and see if it points to anything.

Thank you I’ll give that a try

With chrome running


With youtube video playing

Then, just now !!!

The CPU tab after the above. CPU#0 is doing most of the work? Forced to or by choice?

Can’t see where to find throttling settings.
Web flags warnings regarding burning out the CPU by forcing it to handle too much power.
Is LatencyMon a serious application ?

Playing the same vid again. ok now. strangely inconsistent.


Don’t see the current measured go any where near 610.

strangely inconsistent.

Nothing strange about it…it’s not running the video causing the issue. You’re getting the random spiking of dpc and need to work out what causes that. (which in the first instance looks like it could be usb)…so did you definitely make the usb tweaks I previously suggested??

NB don’t run anything else when you run latencymon, leave it twenty mins and assuming you made those usb tweaks properly, post drivers tab sorted by highest execution.

Hi, thank you Grim
Yes I checked the USB settings as advised. Selective suspends were all turned off.
Have I done it correctly? See image inset.
That’s items 2,3,7,8,9 only from the Device Manager list showing properties inset window below. Nothing else plugged in USBs apart from wireless mouse dongle. (USB Composite Device on list). Will now run LatencyMon with nothing running and everything disconnected from USBs and let you know.

Ok, I’ve run LatencyMon for 25 minutes and got the folowing:


Ntoskernel is a tricky one…can be many other things that cause ntoskernel to be latent I think. You say you upgraded to W10…did you check all your mobo drivers are up to date…this likely wouldn’t happen automatically.

There are a few supposed fix videos for ntoskernel dpc but if you try any of these tweaks and it makes no difference I would probably undo the tweaks after.
Core parking may help but it’s a bit of a last resort…especially on laptop as it will use battery much quicker.

Thanks but I haven’t got a clue what it did or didn’t do when it upgraded.
Know nothing about mobos, core parking etc.

Maybe I need a new laptop. One of the USBs has given up also. I researched the whole requirement when I bought this one but I obviously don’t want to waste time going through all that again only to find that the thing cannot sustain its promised level of performance.

If you want a laptop that will work great off the shelf, you either buy a mac you research extensively on suitability for realtime audio or you need to get a bit lucky. Windows laptops will often require some tweaking unless you buy from a DAW builder that has done it for you.