Hello everyone,
Some of you have already heard my complaints a little bit ago on the last livestream (17th of may). Anyway, I’ve had the Behringer UMC 404 HD for a little while now, however I’ve had a fair amount of pops and crackles. After doing some googeling, it seems like it’s an buffer starvation issue.
I’ll start with an overview of my system.:
OS: Windows 10 Professional
CPU: Ryzen 2400G APU (4c8t)
GPU: Radeon RX Vega 11 graphics
MOBO: Asrock AB350M Pro4
Ram: 2x 8GB Ballistrix Sport DDR4 3200 MHZ
As for my current audio settings, I’ll write them down and include some screenshots.
Bitrate: 24 bits
Sample rate: 192Khz
Buffer size: 8192 Samples
Note: Because I’m a new user I can only post one picture, will update with more once I become a normal user
All other in and outputs have the same settings as out 1-2 properties.
So, even after changing the settings a bunch of times, with sample rates from 44.1Khz trough 192Khz, and buffer sizes from 8 to 8192 samples, I still get pops and crackles.
The UMC404HD is connected to a usb 2.0 port, and changing it to another port (3.0 or otherwise) didn’t change anything.
Changing the buffer size did change the amount of pops and crackles, where a smaller buffer size generally caused more pops and crackles.
What’s quite interesting is that at a higher sample rate (i.e. 192Khz instead of 44.1Khz) the pops where of a audibly higher frequency.
I’ve also tried the interface on a couple of other systems. On my linux laptop it had a bunch of pops and crackles as well. There however, I suspect it was CPU bound, as it’s a very old laptop (2GB of ddr2 and an intel core centrino duo) with limited cpu power. Finally I also tried it with my phone (Cubot Quest) through the USB C OTG port on there with a little adapter. To my surprise this worked perfectly.
I would record what they sound like, but for that I would have to solder up a weird connector right now, and I don’t know how this interface responds to chaining it’s outputs directly to itself. If anyone’s very interested in the way it sounds, I can record it on my phone later. It should be audible enough for that.
If anyone has any idea for what I could do to improve the situation, that would be great. I will update this main post with things that I’ve tried, and if there’s something that definitively fixes it.
-Foorje
Edit 1:
I’ve made some sample recordings of the pops at different sample rates and buffer settings, here’s a link:
https://drive.google.com/open?id=1BBVLRjm_WE_pB1tykdDOU0OjoR0TFa0d