Capture Card, Audio Interface, Dj Controller With Audio Interface

Pownmonkey · May 19, 2020

Okay here it goes,

I have:
-Scarlett 2i2 audio interface
-Traktor kontrol S4 MK2 (with audio interface built in)
-Razer Ripsaw
-Sony A6000

The setup is:
Using the S4 as my dj controller for music streaming, I take the Audio main output from the S4 and feed it into the Input from the 2i2.
That's for recording the audio into OBS (since obs won't recognise the controller from Native Instruments Natively (see what I did there?)).

Then I have my Sony A6000 set on clean HDMI output, taking a Micro HDMI to HDMI to the HDMI IN on the Ripsaw.
The ripsaw is connected via USB 3.0 to my pc.

I get the video feed, CRISPY AF.
And I get the audio feed from the 2i2 into OBS.

Here is the problem:
When I turn on the video feed in obs the audio from the S4 is stuttering. When I play it through the 2i2 only, (so not using the main output from the S4) there is no problem.

I never had this problem when I was using 2 Webcams...

Are my USB's saturated? Is there not enough bandwidth? Is it a grounding issue (the camera works on a battery atm).
Could it be that the USB controllers are not giving enough power???

I used latencymon, and it showed me (upon opening the A6000 in OBS as a video feed) very high numbers which means stuttering audio... As soon as I disconnect the camera from the capture card (with the capture card still running) it's all fine...

Should I buy another capture card? Should I buy a powered USB hub? Should I buy an internal capture card??
Kind of allready tried everything and not really willing to spend more money unless it's really necessary..

Hope some of you techies can help me out here!!

Grtz!!!

The Flying Sloth · May 20, 2020

It sounds to me like you're either running your sample rates too high (no reason to go above 24bit 44.1khz), buffer size too low or you're saturating your USB controller.
If changing those settings doesn't help you could always try a PCIE USB expansion card, no telling if it will help but it certainly can't hurt.
I'm no expert on this sort of stuff so take it with a pinch of salt, I'm more interested in studio audio where we run 64+ audio channels simultaneously on a single USB 2.0 connection.

Sloth

Pownmonkey · May 29, 2020

On 5/20/2020 at 6:10 AM, The Flying Sloth said:

It sounds to me like you're either running your sample rates too high (no reason to go above 24bit 44.1khz), buffer size too low or you're saturating your USB controller.
If changing those settings doesn't help you could always try a PCIE USB expansion card, no telling if it will help but it certainly can't hurt.
I'm no expert on this sort of stuff so take it with a pinch of salt, I'm more interested in studio audio where we run 64+ audio channels simultaneously on a single USB 2.0 connection.

Sloth

Thanks for your input!
I managed indeed to fix it by buying a Expansion Card with 5GB/s per channel. Works like a charm now! (https://www.startech.com/nl/en/Cards-Adapters/USB-3.0/Cards/PCI-Express-USB-3-Card-4-Dedicated-Channels-4-Port~PEXUSB3S44V)

Bitrate has been 44.1khz@24bit at all times.
Defo saturated the USB controller!
So that's that!!