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It is solved by restarting the Helix Rack.

Hi, I am experiencing a wired noise. I posted a thread in the forum: Would you please have a look and give me some advice?

Is there any manual or link or tutorial or thread that can tell me how to switch between the drivers? the classic compliant and line6 one?

It has been the largest 1024 buffer size. Thank you Zolko. I am looking for MAC OS expert to help me.

may i know where to swap the drivers?

Hi, Zolko Here is the wave sample with and without noise. Dist GTR_06 (with noise).wav Dist GTR_33 (without noise).wav

Hi, Zolko I have tested it again in Ableton, by setting audio interface only to the Helix one rather than the aggregated one. The issue still exists. When the issue was first noticed, it was in a recording session in which only the bass guitar was unplugged and the guitar was plugged in. There should be no hardware or software setup changing when the issue comes up. Is is possible that the hardware of Helix Rack is damaged? Peter

Yesterday, I was recording with helix rack, helix native and Cubase Pro 10. When I recorded the bass, it worked well. When I recorded the guitar later (about 10 minutes later), I find the dry signal from Helix USB 7 has a lot of noise. I have reinstall the Helix driver and restarted the computer, the problem still exists. I have been working in this way for several months, there was no problem. Suddenly from yesterday, the noises comes. The Helix is combine with UA apollo as aggregated device in MAC OS.