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Author Topic: Help troubleshooting new DVS recording issues  (Read 2173 times)

Andrew Broughton

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Help troubleshooting new DVS recording issues
« on: April 16, 2017, 03:28:54 pm »

So, for years before this, I've had no real problems recording multi-track (32 tracks) of 16 or 24 bit/48k audio using DVS on my Lenovo ThinkPad from RIOs

This year, I cannot get a clean recording. I know there's been Dante and Firmware updates between this year and last, but I don't know if they are the cause.
I thought maybe something had happened to my computer (a piece of software or driver update) that had caused me to not be able to cleanly record DVS multitracks, so I did a clean install of Win10 on the computer. No dice, same issue. Wiped that partition and did a clean install of Win7. (The computer's a few years old and Win7 has always worked best on this computer) Tried another recording, still having issues.

I get random skips and glitches in the recordings. In the past, I would have chalked that up to too slow a hard drive, but this machine (even when it had spinners) has never had an issue. It now has SSDs all around, so that can't be an issue. I've always had the ASIO and DVS settings at maximum latency and buffer sizes and my computer still has the same RAM it always had - 8gb, so I'm at a loss as to what is causing the problems.

It's skipping and glitching. I see no clocking errors in DC, the only warnings are Fanout detections, but I've always had those, and I'm still well under the max flows limitation.

The RIOs are on firmware 3.11 which I know is not the latest, but has been fine for the past years.
DVS is 3.10.1.1
Computer is a Lenovo ThinkPad W520 with 8gb ram, 3 Samsung 500gb EVO 850 SSDs (1 mSATA, 2 SATA), running Win 7 with all updates.

I need some help to figure out how to troubleshoot this issue. I'm pretty sure it's my computer as another person has been able to record clean multi-tracks on this system using the same version of DVS.

Thanks for any and all help!
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boburtz

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Re: Help troubleshooting new DVS recording issues
« Reply #1 on: April 16, 2017, 03:35:39 pm »

I need some help to figure out how to troubleshoot this issue. I'm pretty sure it's my computer as another person has been able to record clean multi-tracks on this system using the same version of DVS.

Thanks for any and all help!
Do you have the dpc latency checker? I would start there, it's an invaluable tool for rooting out  computer problems as they relate to DVS stability.
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David Sturzenbecher

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Re: Help troubleshooting new DVS recording issues
« Reply #2 on: April 16, 2017, 03:45:57 pm »

Have you followed all the suggestions here?

https://www.audinate.com/faq/how-can-i-tune-windows-pc-best-audio-performance

I had issues that were resolved with a LAN driver update.


Sent from my iPhone using Tapatalk Pro
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Andrew Broughton

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Re: Help troubleshooting new DVS recording issues
« Reply #3 on: April 16, 2017, 04:42:18 pm »

Do you have the dpc latency checker? I would start there, it's an invaluable tool for rooting out  computer problems as they relate to DVS stability.
Great tip. I forgot about that program.
Ran it and even though I'm not getting any Red bars, disabling my WiFi Driver definitely lowers the latency. My computer has a hardware switch to disable the WiFi and I thought that was enough (certainly helps when using DC) but even with the hardware switch off, disabling the driver in Device Manager lowers the latency further.
Even though I have the MS approved driver, I'll see if there's a later version from Intel.

Thanks!
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-Andy

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Andrew Broughton

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Re: Help troubleshooting new DVS recording issues
« Reply #4 on: April 16, 2017, 04:43:28 pm »

Have you followed all the suggestions here?

https://www.audinate.com/faq/how-can-i-tune-windows-pc-best-audio-performance

I had issues that were resolved with a LAN driver update.


Sent from my iPhone using Tapatalk Pro
Thanks for that link. Looks like I already had done all the suggestions there except of course for running DPC.
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jabney (john abney)

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Re: Help troubleshooting new DVS recording issues
« Reply #5 on: April 17, 2017, 03:03:01 pm »

...recording multi-track (32 tracks) of 16 or 24 bit/48k audio using DVS...

This year, I cannot get a clean recording...

I need some help to figure out how to troubleshoot this issue. ...
We had some problems with Dante DVS, and it seems that one or more of the following work ... so far:

. 32 Dante channel limit (we had been using 64 Dante channel limit)
. Multicast for everything (wish Dante would make Multicast the default)
. Hardware Dante at 'both ends' (we added an Ashly digiMIX24 with a Brooklyn II card for monitoring the Dante signal, etc - we already had the Allen&Heath iLive 48 with its Brooklyn card)

best, john




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Ade Stuart

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Re: Help troubleshooting new DVS recording issues
« Reply #6 on: April 18, 2017, 06:10:54 pm »

If disabling WiFi hasn't worked have you checked the latency and clock histograms for each device.

https://www.youtube.com/watch?v=FLQDwDXXoxc
https://www.youtube.com/watch?v=Sgnx0-TwDjE

What is the full network setup?
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Andrew Broughton

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Re: Help troubleshooting new DVS recording issues
« Reply #7 on: April 18, 2017, 06:24:07 pm »

Thanks, Ade. My recording last night was better, but still not perfect. I'll try these logs while recording to see if they are showing errors.
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-Andy

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Andrew Broughton

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Re: Help troubleshooting new DVS recording issues
« Reply #8 on: April 18, 2017, 08:48:44 pm »

Ok, looks like the clock is fine, but latency is the problem. It's fine for up to a few minutes, then glitches with a 30-60ms delay. Sometimes a few in a row.
1st Latency pic is when not recording, 2nd is while recording.
« Last Edit: April 19, 2017, 05:05:01 pm by Andrew Broughton »
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-Andy

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Ade Stuart

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Re: Help troubleshooting new DVS recording issues
« Reply #9 on: April 19, 2017, 04:48:57 pm »

Ok, looks like the clock is fine, but latency is the problem. It's fine for up to a few minutes, then glitches with a 30-60ms delay. Sometimes a few in a row.

A few thoughts

Is dpclat always in the green, if not have you tried running dpclat whilst recording and monitoring latency and if so do you see any simultaneous spikes?

Are the hard drives RAID or JBOD?






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