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02-12-2019, 10:45 PM
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#1
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Human being with feelings
Join Date: Jun 2015
Posts: 54
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Latency sample in the negative?
Im trying to figure out the latency of my interface using a loop and ping in realinsert and im getting -46. That cant be right correct?
Can anyone shed some light on this? I cannot find a single instance of this online.
Last edited by shrineoftheserpent; 02-12-2019 at 10:51 PM.
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02-13-2019, 09:35 PM
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#2
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Human being with feelings
Join Date: Jun 2015
Posts: 54
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no one huh?
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02-14-2019, 01:06 AM
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#3
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Human being with feelings
Join Date: Sep 2008
Location: UK
Posts: 3,648
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Interface resorts latency to reaper. If reported incorrectly it could be less or more.
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02-14-2019, 04:13 AM
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#4
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Human being with feelings
Join Date: May 2015
Location: Warrington, UK
Posts: 1,444
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Quote:
Originally Posted by shrineoftheserpent
Im trying to figure out the latency of my interface using a loop and ping in realinsert and im getting -46. That cant be right correct?
Can anyone shed some light on this? I cannot find a single instance of this online.
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I tried the same the other day and also got a negative value.
But when I put some hardware in the loop then it reported a positive value.
I can't really help, and I am just confirming that you are not the only one experiencing this.
cheers
andy
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02-14-2019, 11:03 AM
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#5
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Human being with feelings
Join Date: Jun 2015
Posts: 54
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Quote:
Originally Posted by synkrotron
I tried the same the other day and also got a negative value.
But when I put some hardware in the loop then it reported a positive value.
I can't really help, and I am just confirming that you are not the only one experiencing this.
cheers
andy
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Hmmm. ok./.
I guess Ill roll with it... I wonder if the interface does that as part of the design to compensate for the latency.
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02-14-2019, 12:54 PM
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#6
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Human being with feelings
Join Date: Aug 2011
Location: Near a big lake
Posts: 3,943
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Quote:
Originally Posted by synkrotron
I tried the same the other day and also got a negative value.
But when I put some hardware in the loop then it reported a positive value.
I can't really help, and I am just confirming that you are not the only one experiencing this.
cheers
andy
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Negative value being reported by ReaInsert during ping test, with nothing in the hardware loop = your sound device misreporting its latency to Reaper, which needs to be compensated for (positive or negative, it can be misreported either way). Change your audio device settings in preferences (under audio->recording, at the bottom: look for "manual offset"). After doing this, confirm by doing another ping test in ReaInsert (with nothing in the hardware loop). When ReaInsert shows the value as 0, your audio device's latency is now compensated for. (If you change your sample rate you'll have to test this again and adjust your audio device manual offset again.)
Positive value being reported by ReaInsert during ping test, when a processor is inserted in your audio hardware loop = latency introduced by the processor (very common especially for digital devices). Use the ping detect in ReaInsert and as long as your audio device is not adding any unreported latency, ReaInsert will compensate for the latency of the processor you've put in the hardware loop. This of course will add latency to the entire project to compensate, but if you're going to use external processors that's normal.
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02-14-2019, 01:25 PM
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#7
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Human being with feelings
Join Date: May 2015
Location: Warrington, UK
Posts: 1,444
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Quote:
Originally Posted by JamesPeters
Negative value being reported by ReaInsert during ping test, with nothing in the hardware loop = your sound device misreporting its latency to Reaper, which needs to be compensated for (positive or negative, it can be misreported either way). Change your audio device settings in preferences (under audio->recording, at the bottom: look for "manual offset"). After doing this, confirm by doing another ping test in ReaInsert (with nothing in the hardware loop). When ReaInsert shows the value as 0, your audio device's latency is now compensated for. (If you change your sample rate you'll have to test this again and adjust your audio device manual offset again.)
Positive value being reported by ReaInsert during ping test, when a processor is inserted in your audio hardware loop = latency introduced by the processor (very common especially for digital devices). Use the ping detect in ReaInsert and as long as your audio device is not adding any unreported latency, ReaInsert will compensate for the latency of the processor you've put in the hardware loop. This of course will add latency to the entire project to compensate, but if you're going to use external processors that's normal.
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Thanks
I will look into that. In the meantime everything appears to be okay.
cheers
andy
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02-15-2019, 01:13 AM
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#8
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Human being with feelings
Join Date: Jun 2015
Posts: 54
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Quote:
Originally Posted by synkrotron
Thanks
I will look into that. In the meantime everything appears to be okay.
cheers
andy
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I entered the -41 in the manual offset and pinged again., I got ZERO. So I guess Im good for now.
Like stated before. Im having better luck using the hardware ins and outs on the track ( as opposed to realinsert) with the latency compensated for in the manual offset settings. As for now its working., This is a learning process.
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02-15-2019, 01:17 AM
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#9
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Human being with feelings
Join Date: Oct 2007
Posts: 784
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I've seen negative values in Reinsert, normally on the box that's plugged in over SPDIF.
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02-15-2019, 09:14 AM
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#10
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Human being with feelings
Join Date: Aug 2011
Location: Near a big lake
Posts: 3,943
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Quote:
Originally Posted by rothchild
I've seen negative values in Reinsert, normally on the box that's plugged in over SPDIF.
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I'm guessing you would see the same negative number with just a cable looping the output back to the input, with no hardware device inserted. This is about your audio device's latency being misreported to Reaper. You can correct this in the preferences as I mentioned in my last post.
If for some reason adding any kind of device between your audio device's output and input manages to report a negative latency, you have just discovered a time travel device.
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02-15-2019, 10:54 AM
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#11
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Human being with feelings
Join Date: Jun 2015
Posts: 54
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Quote:
Originally Posted by JamesPeters
I'm guessing you would see the same negative number with just a cable looping the output back to the input, with no hardware device inserted. This is about your audio device's latency being misreported to Reaper. You can correct this in the preferences as I mentioned in my last post.
If for some reason adding any kind of device between your audio device's output and input manages to report a negative latency, you have just discovered a time travel device.
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Haha. Yeah I guess so huh?
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