Hello everyone!
I bought headphones yesterday (Onedio Monitor 40) and I tested them in my phone. The quality was pretty good! Now I connect them to my Manjaro computer and the sound quality is horrible. When I hear a song with Audacious, I use the equalizer, I fix the frequences and the sound is OK. Is there any application with equalizer to adjust the sound quality of the whole system? Should I buy a better sound card? Now I have the Powertech PCI Express 5.1 ST17.
Also I have intel i5 10400f, so I cannot use the output from the motherboard.
Thanks for the attention, I you need more info ask me!
There is several truckloads of applications for multimedia - which one will fit your usecase is impossible to say. The closest to the category you search for would likely be easyeffects from the repos
sudo pacman -Syu easyeffects
I’m not sure what you mean by “of the whole system”, given that sound is routed and processed at the level of individual user accounts, and — especially with pipewire — even individual applications.
That said, you could install easyeffects and use that as the sink, and you can keep it running in the background to process the sound as you would desire.
What do I mean with “The whole system”:
When I listen music with audacious, everything is fine. When I watch a movie with ‘mpv Media Player’, or when I want to watch a video on youtube, or when i listen music from Spotify, the sound quality is bad.
Is there any application to adjust the frequencies in the output of the computer? I installed easyeffects and I cannot see this option.
Sorry for my bad english
You should normally see an equalizer when firing up easyeffects. 
Ok I found it! I didnt see the ‘effects’ option in the bottom. I had to install also a package called ‘lsp-plugins’. Now I can adjust the frequences of the output, exactly as I want. Thanks for the help everyone!!!
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