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.
I’ve made some sample recordings of the pops at different sample rates and buffer settings, here’s a link: