aaa839 Posted March 18, 2019 Share Posted March 18, 2019 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. Quote Link to comment Share on other sites More sharing options...
zolko60 Posted March 18, 2019 Share Posted March 18, 2019 Isolate the issue. 1. Deagregate interfaces. 2. Check if round trip on Hx works (DI to DAW, DAW to Helix, Helix to DAW) and how it differs from monitoring direct. 3. Agregate again 4. Check if round trip works while agregatted. 5. Make some conclusions, 6. Change troubleshooting method if not succesfull. 7. Keep the forum informed. Quote Link to comment Share on other sites More sharing options...
aaa839 Posted March 18, 2019 Author Share Posted March 18, 2019 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 Quote Link to comment Share on other sites More sharing options...
zolko60 Posted March 18, 2019 Share Posted March 18, 2019 Sure. It can be the case but don't give up yet. 8. All Returns if set to instrument level are equal to guitar input set to 1Mohm. Try to set them to USB, check if they work properly. 9. What kind of noise is that? Quote Link to comment Share on other sites More sharing options...
aaa839 Posted March 18, 2019 Author Share Posted March 18, 2019 Hi, Zolko Here is the wave sample with and without noise. Dist GTR_06 (with noise).wav Dist GTR_33 (without noise).wav Quote Link to comment Share on other sites More sharing options...
zolko60 Posted March 18, 2019 Share Posted March 18, 2019 Crackling noise. 10. Check if setting higher buffer helps. 11. Swap drivers. There are two of them: Class Complaint 48kHz and "multisampling downloaded" Quote Link to comment Share on other sites More sharing options...
aaa839 Posted March 18, 2019 Author Share Posted March 18, 2019 may i know where to swap the drivers? Quote Link to comment Share on other sites More sharing options...
zolko60 Posted March 18, 2019 Share Posted March 18, 2019 You may google it ;) Quote Link to comment Share on other sites More sharing options...
aaa839 Posted March 18, 2019 Author Share Posted March 18, 2019 2 minutes ago, zolko60 said: You may google it ;) I attached two shapshot of what I can see in the audio setup. There is no line6 driver. I have installed the driver when I first use Helix and re intalled it this morning. I have never seem a driver beside the core audio. Would you please give me a more specific instruction. Quote Link to comment Share on other sites More sharing options...
zolko60 Posted March 18, 2019 Share Posted March 18, 2019 Unfortunatelly I am not OSX expert. I guess both drivers are Core Audio. If you can change sample rate it is "downloaded". Class Compliant one os 48kHz and can not be unistalled. If crackling occurs at 512 samples buffer it is no good. It is huge already. Maybe somebody OSX experienced can join the thread and help you. Quote Link to comment Share on other sites More sharing options...
aaa839 Posted March 18, 2019 Author Share Posted March 18, 2019 9 minutes ago, zolko60 said: Unfortunatelly I am not OSX expert. I guess both drivers are Core Audio. If you can change sample rate it is "downloaded". Class Compliant one os 48kHz and can not be unistalled. If crackling occurs at 512 samples buffer it is no good. It is huge already. Maybe somebody OSX experienced can join the thread and help you. It has been the largest 1024 buffer size. Thank you Zolko. I am looking for MAC OS expert to help me. Quote Link to comment Share on other sites More sharing options...
zolko60 Posted March 19, 2019 Share Posted March 19, 2019 12. Swap USB cables. 13. Swap USB ports 14. Try with no USB hub and with hub Quote Link to comment Share on other sites More sharing options...
aaa839 Posted March 19, 2019 Author Share Posted March 19, 2019 11 hours ago, zolko60 said: 12. Swap USB cables. 13. Swap USB ports 14. Try with no USB hub and with hub It is solved by restarting the Helix Rack. 1 Quote Link to comment Share on other sites More sharing options...
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