Hello guys!
I'm using ubuntu 20.04 with kernel 5.4.0-47 lowlatency and a "Lexicon Alpha" USB soundcard.
When i use the soundcard with my AKAI midi controller, i start hearing a background noise. These two devices correctly worked toghether in previous systems, now they are not. I don't know if it's a software related problem...
Thanks in advance.
[solved] Soundcard background noise when MIDI controller is plugged
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[solved] Soundcard background noise when MIDI controller is plugged
Last edited by tuzzo on Thu May 20, 2021 1:16 pm, edited 1 time in total.
- bluebell
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Re: Soundcard background noise when MIDI controller is plugged
Can it be a ground loop? That happens when you have more than one device with protective earth connected (in the socket) AND use unbalanced cables (cinch, mono jack). Effects can be a hum and/or hiss, sometimes dependent on mouse movenments.tuzzo wrote: ↑Wed Sep 09, 2020 1:02 pm Hello guys!
I'm using ubuntu 20.04 with kernel 5.4.0-47 lowlatency and a "Lexicon Alpha" USB soundcard.
When i use the soundcard with my AKAI midi controller, i start hearing a background noise. These two devices correctly worked toghether in previous systems, now they are not. I don't know if it's a software related problem...
Thanks in advance.
Solution:
Use balanced cables (best solution if your devices have balanced inputs/outputs) or use an audio transformer.
Linux – MOTU UltraLite AVB – Qtractor – http://suedwestlicht.saar.de/
Re: Soundcard background noise when MIDI controller is plugged
I placed an USB 4 port hub between the PC and the MIDI controller and i'm having no issues?? How is that possible? Maybe it depends on my laptop?bluebell wrote: ↑Wed Sep 09, 2020 1:38 pmCan it be a ground loop? That happens when you have more than one device with protective earth connected (in the socket) AND use unbalanced cables (cinch, mono jack). Effects can be a hum and/or hiss, sometimes dependent on mouse movenments.tuzzo wrote: ↑Wed Sep 09, 2020 1:02 pm Hello guys!
I'm using ubuntu 20.04 with kernel 5.4.0-47 lowlatency and a "Lexicon Alpha" USB soundcard.
When i use the soundcard with my AKAI midi controller, i start hearing a background noise. These two devices correctly worked toghether in previous systems, now they are not. I don't know if it's a software related problem...
Thanks in advance.
Solution:
Use balanced cables (best solution if your devices have balanced inputs/outputs) or use an audio transformer.
- bluebell
- Established Member
- Posts: 1926
- Joined: Sat Sep 15, 2012 11:44 am
- Location: Saarland, Germany
- Has thanked: 112 times
- Been thanked: 121 times
Re: Soundcard background noise when MIDI controller is plugged
If it is a powered hub then maybe the laptop's USB ports didn't have enough power.tuzzo wrote: ↑Wed Sep 09, 2020 1:49 pmI placed an USB 4 port hub between the PC and the MIDI controller and i'm having no issues?? How is that possible? Maybe it depends on my laptop?bluebell wrote: ↑Wed Sep 09, 2020 1:38 pmCan it be a ground loop? That happens when you have more than one device with protective earth connected (in the socket) AND use unbalanced cables (cinch, mono jack). Effects can be a hum and/or hiss, sometimes dependent on mouse movenments.tuzzo wrote: ↑Wed Sep 09, 2020 1:02 pm Hello guys!
I'm using ubuntu 20.04 with kernel 5.4.0-47 lowlatency and a "Lexicon Alpha" USB soundcard.
When i use the soundcard with my AKAI midi controller, i start hearing a background noise. These two devices correctly worked toghether in previous systems, now they are not. I don't know if it's a software related problem...
Thanks in advance.
Solution:
Use balanced cables (best solution if your devices have balanced inputs/outputs) or use an audio transformer.
Linux – MOTU UltraLite AVB – Qtractor – http://suedwestlicht.saar.de/
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Re: Soundcard background noise when MIDI controller is plugged
I find that I have to try and use different USB ports sometimes if I'm getting noise.