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Post new topic Determining source of variable latency
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Author Topic:  Determining source of variable latency
Brad Issendorf

 

From:
Lake City, Minnesota
Post  Posted 15 Nov 2020 7:42 pm    
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I have been hired to add pedal steel tracks to existing tracks. Before Covid, I was to physically go to the studio and record them. The gentleman in charge of recording is, and rightfully so, trying to stay distant from everyone, so for the meantime recording in-person is out.

With this new reality, I bought an audio interface, installed Bandlab, and set out to make acceptable recordings directly from my rack, through the interface, into Bandlab.

My problem is ever changing latency. I can run the test and apply the corrections and immediately record. I would guess that there is several hundred milliseconds change somewhere between the latency test and finishing recording the track.

How or what do I do to find or repair the culprit?
Is it my interface, the software, the operating system or is it me? Any help is appreciated!

Brad
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Nicholas Cox


From:
California, USA
Post  Posted 15 Nov 2020 8:30 pm    
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Make sure the interface and the DAW are using the same sample rate.
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Brad Issendorf

 

From:
Lake City, Minnesota
Post  Posted 16 Nov 2020 10:24 am    
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Are you familiar with the Bandlab app?

How do I go about determining this?

I can run the latency test before every run and the results vary between like 130ish ms and the very next time they result closer to 300. Any ideas how, with no changes, it can be so different? Or is it possible to correct the correlation between the imported track and mine another way?

I've been working in this off and on for a couple months now and I'm kind of confused
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Fred Treece


From:
California, USA
Post  Posted 17 Nov 2020 6:57 am    
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Couple things. Any latency has to do more with internet speed than the interface. If you live in the boonies like I do, you are probably years away from fiber optic transmission. The only other solution is to pay a higher rate for the fastest DSL you can get your hands on.

Don’t run your connection wireless. Go with an Ethernet cable from your router to the computer.

Sample rate changes can be made in the Preferences (or Settings) menu of both your interface and recording app. Lowering the sample rate decreases latency while also sacrificing sound quality.

I am not a professional recordist, but have been similarly frustrated with trying to record online. I downloaded the free version of Cakewalk by BandLab and work offline. No latency, and a pro-quality DAW. Import tracks to Cakewalk, record my part, and then export to BandLab.
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Brad Issendorf

 

From:
Lake City, Minnesota
Post  Posted 17 Nov 2020 10:23 am    
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I guess that the only care with the latency is when I play two or more tracks back at the same time. They aren't synced because the latency seems to constantly change, even with as much stuff disabled from running in the background as possible.

Just out of curiosity, what device are you running Bandlab with?

Thanks for all of the input so far.
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Fred Treece


From:
California, USA
Post  Posted 17 Nov 2020 3:14 pm    
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I run BandLab on a PC. The latency online with the app was in years. I record on Cakewalk, offline. I believe you can edit BandLab tracks offline, but you have to be on to record them.

I think I understand what you’re saying now. Is the problem mostly with playback, or is it mostly with recording, or the same with both? I will dink around with my setup and let you know if I figure out anything.

If you want the voice of experience on this, ask forum member Jack Stoner. Here is a thread with one of his responses. He got me interested in Cakewalk by BandLab.

https://bb.steelguitarforum.com/viewtopic.php?t=363598&highlight=
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Brad Issendorf

 

From:
Lake City, Minnesota
Post  Posted 17 Nov 2020 6:22 pm    
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My only concern is in the playback. The guy in charge of recording and mixing is my sole concern. I'm not sure, not to sound condescending, if he will be able to utilize the files even if the latency problem didn't exist, but the additional hurdle of properly syncing them lowers the probability further. I like both the singer and the project producer a lot and just want to provide them with the best submissions I can muster.
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Jim Fogle


From:
North Carolina, Winston-Salem, USA
Post  Posted 17 Nov 2020 6:28 pm    
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Brad,

One way to mask latency is by monitoring through the audio interface headphone jack while you are recording.

Many computer audio interfaces include a headphone jack for monitoring. Sometimes the audio interface headphone jack output will be a 50/50 blend of pre-recorded tracks in the DAW and the recorded input from your instrument. Other times the audio interface will have a switch or control knob to allow you to set the blend of the audio to taste. In both cases, the audio interface automatically synchronizes the audio from the computer and the audio from your instrument so there is no latency.

Let us know what audio interface you have. That information will be helpful.
_________________
Harold Fogle (1945-1999) Brother - Pedal Steel Player
Dell laptop Win 10, i3, 8GB, 480GB
2020 BiaB UltraPlus PAK
Cakewalk by Bandlab DAW
Zoom MRS-8 DAW
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