Panu Pentikäinen

Did you have auto-save on?

Check all files in the project folder and see if there are project files starting with ~ character or named as "Auto-save ....".

If not, just drag the clips to a new project with same tempo and reconstruct everything manually.

44.1/24 except when client requests 48k for video.

I have used 88.2k and 96k, too. They sound slightly better but not enough to sacrifice number of available inputs and I need them all.

Gswitz, your Digicheck tip is awesome! I will try it asap. Recording with Digicheck will also be a good backup in critical recording session.
I believe all plugins are registered properly but I can verify this one, too..

39 minutes ago, Keni said:

Sounds like it might be a driver or click issue.

Have you looked at that side?

Hi Keni!

I have updated RME driver and firmware but the problem has stayed the same. Maybe the next step is to disable as much background processes as possible to keep the system running and see what happens. It will take some time, though, because detecting the missed chunks requires recording + listening and sometimes problem may be absent for hours. 

...

Microsoft Security Essentials is disabled, I have no virus scanners running at all.

Checklist:

- Adobe Creative Cloud is running on background. Disable.
- Google Backup And Sync is running on background, too (synced folder is on the system SSD). Disable.
- Check all new programs that are installed during the past months.
- Check Windows error logs.

2 hours ago, Gswitz said:

Friday I made a recording. I was shuffling around in winter in slippers and a couple of times sent static electricity through the gear. Each time, I had to power cycle my rme ucx. It did not happen during recording... Only set up. Possible something similar is happening to you?

I would not look after static electricity in my case because  my UFX unit functions perfectly all the time; real time monitoring is sample perfect, only the recorded audio has those missing chops.  Thus I believe it's software issue rather than hardware failure. 

There is "Errors" count in RME control panel.  It always shows zero which means that RME driver has no clue that audio samples are lost in the way. Also Cakewalk/SONAR  seems to be totally unaware of the problem.  I have to take a closer look at all running processes.

3 hours ago, David Baay said:

Is disk write caching enabled (default is no caching)? Maybe rename Aud.INI, and try using the default INI file for a while. Or try setting a suitable non-zero Record Pre-allocate value.

Disk caching was disabled.
I tried to rename AUD.ini already (did not help). I'll try to enable pre-allocate next.

Thanks for the tips!

3 hours ago, Gswitz said:

Do the missing chunks exactly match the buffer size at the time of recording? Losing the audio in your buffer do to dpc latency could cause your symptom. Have you run latency monitor to check your system.

Thanks for your help!

Size of missed chunks varies randomly and I have not seen any relation to buffer sizes.
I tested DPC latency; values are very low and system should be more than capable to record audio perfectly.

I have a longstanding issue I have not been able to fix: every now and then I record audio there are little parts (app. 20-500 samples) missing. This creates ugly clicks in the audio but also makes the recorded audio go out of sync.  It happens so randomly (0 ... 5 times per recorded 5 minutes of audio, sometimes even hours without any glitch) that I have no idea where to search for the cause.

I know this:

- May happen in any project.
- Bypass all FX does has no effect.
- Record on a new project with no FX does not prevent glitches.
- It happens in the last SONAR version, too; thus it's not CbB era related.
- I tested DPC latency with DPC latency checker tool; latency is very low and there are no problems.
- PC is fast i7, 32 GB RAM, Windows7 Ultimate (automatic updates disabled),  dedicated to audio work. It's on net.
- Audio is recorded to dedicated hard drive. System is on different SSD disk.
- I have tried to delete AUD.ini.
- Audio interface RME UFX (ASIO) has latest driver and firmware. I have replaced the USB cable and tried to connect it to a different USB port.
- Changing ASIO buffer size has no effect (256-1024).
- Always 44.100 Hz, RME clock is locked and in sync.
- I have disabled all other sound devices in Device Manager.
- Windows sound cheme is "No sounds".
- AxeFX II is connected via USB2, driver is disabled. Keeping Axe FX2 power off has no effect on this.

- Glitches are not heard in direct monitoring (in RME Totalmix), they appear only on the recorded clips in CbB/SONAR.

This is most probably *NOT* CbB's fault - otherwise there would be thousands of other users complaining this - but also the RME drivers are tested to death.

Is there a tool available to test and troubleshoot this kind of issue?
Any fresh ideas to hunt for the cause of the issue?

On 12/24/2018 at 2:54 AM, Lord Tim said:

I think that's like some kind of a law from your part of the world, that you have to serve your time in a black or death metal band, kind of like national service! 😛

LOL It's funny because it's true... But there are much more black metal bands in Norway than in Finland which is "general" metal country: Apocalyptica, Amorphis, Children of Bodom, Nightwish, Impaled Nazarene, Stratovarius, Stam1na, Korpiklaani...

Rock, hardrock, prog rock, classic rock, melodic metal!

I even was a guitarist in a black metal band but today my favorite bands are closer to 80's Pink Floyd, Muse, Von Hertzen Brothers, Black Sabbath and Helloween. Dynazty (form Sweden) is good, too. And Ghost, of course.