oh, man…hi there, lets go…
At first - Do i need it?
You can maybe uncheck the checkmark. What is working at the first time.
But after i got a Shut Down of Renois while using Sampler and VST Plugin same time,
a re-open Renoise got the same crackle sound as before the uncheck RT.
And i do not understand why this is happen.
I do not have reboot the system yet, but i will try to get the clear sound back after uncheck the ckeckmark
for real time audio what worked.
[ ] use realtime priority (requires rtprio permissions)
Before this, i log out/ reboot and proof if my setting (i describe below) for real time thread its working to run Renoise.
If this is working this can be used as a Tutorial for Beginners to fix Real Time (RT) issues in ALSA with Pipewire on Debian Systen (MX Linux). (if you need, and if the checkmark not unchecked)
So this can be pretty technical for beginners as well.
So i switched from Windows to Linux and really want to use Renoise on my System, but as a Linux Beginner the realtime thing is kinda crazy and i don’t get it running, but i am about to solve it just now. I am afraid of configure ALSA for Real Time Thread, but it looks relative simple.
i read about check the kernel config for these setting in
/boot/config-6.14.8-1-liquorix-amd64
open this file and i found this (strg+f for seaching)
CONFIG_PREEMPT=y
# CONFIG_PREEMPT_LAZY is not set
# CONFIG_PREEMPT_RT is not set
So it seems RealTime is not set.
But anyways. It seems i need to edit the mentioned in the FAQ Setting: (Linux FAQ - Renoise User Manual)
$sudo nano /etc/security/limits.conf
and added with a normal “-” at the end, before #End of Line (it is a comment anyways):
xx - rtprio 99
xx - nice -10
i change “myusername” to my actual used username in this case “xx” on the system, right?
I am not sure about xx - memlock 512000 option so i dont set this up (link in the FAQ)
to check if its working, save, re-login or reboot.
And it does’t work.
As you read above i found to uncheck the option (opt-out) in the setting 
[ ] use real time priority
and this works right now, until i got an issue and open renoise again, after is suddenly closed.
So, actually, i dont know how this setting work, why it actuall not work after the sudden close.
What i need to do?
i try to follow the Linux FAQ and added additional Information about my system and what i sould check:
Operating System: MX Linux 23
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: (64-bit)
Graphics Platform: X11 (v7.7)
Processors: 20 × Intel® Core™ i5-14600K
Memory: 62.6 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 4070 Ti SUPER
Audio:
Device-1: Intel Raptor Lake High Definition Audio vendor: Micro-Star MSI driver: snd_hda_intel
bus-ID: 1-11:6 v: kernel alternate: snd_soc_avs,snd_sof_pci_intel_tgl chip-ID: 0db0:a74b
bus-ID: 00:1f.3 class-ID: 0300 chip-ID: 8086:7a50 class-ID: 0403
Device-2: NVIDIA vendor: Palit Microsystems driver: snd_hda_intel
Device-3: Micro Star USB Audio type: USB driver: hid-generic,snd-usb-audio,usbhid
API: ALSA v: k6.14.8-1-liquorix-amd64 status: kernel-api tools: alsamixer,amixer
Server-1: PipeWire v: 1.0.0 status: active with:
1: pipewire-pulse status: active
2: wireplumber status: active
3: pipewire-alsa type: plugin
4: pw-jack type: plugin tools: pactl,pw-cat,pw-cli,wpctl
more tech check:
: libasound2 - installed
: x11 v7.7 - installed
: libstdc++6 v.12.2 - installed
: gcc v.4.12 - installed
: libc6 - installed
: libgcc-s1 v.12.2 - installed
: libxau6 - installed
: libxdmcp6 - installed
Thread in Progress. Any comments appreciated.
