How to lower volume on mac without sound

I have the audio volume on KDE/Plasma set to 40%, and almost every program I use outputs sound at a reasonable volume. That seemed to keep it out of the red (just barely), but it still sounds too low to me. 1dB seemed like it was still peaking in the red, so I lowered it to -4.5dB. I tested some audio levels shortly after I read your post, but I hadn't actually streamed again until a few hours ago. So just how should I set the audio volumes? Is there a setting in KDE/Plasma I should use? Am I being a little too cautious of the game audio peaking into the yellow zone? I'm absolutely a newbie at this stuff, so please be easy on me.Д¬lick to expand.Thanks for the response. I tried doing a test recording with the desktop audio at 0.0dB, and I could hear the occasional audio glitch. After I was done with the stream, I watched the VOD, and it was significantly quieter than I would prefer. An acquaintance of mine spoke up in chat and said the volume was low, but being in the middle of a stream, I couldn't exactly hear just how low it was. I went ahead and streamed on Twitch with that setting for about an hour (my first actual stream). That resulted in the volume level being -13.3dB (or 22%).

I started the game I was going to play, and I adjusted the volume slider so that the volume meter wouldn't go into the yellow zone, even when it peaked. I followed the 'Understanding the Mixer' OBS guide to set up the volume on my Desktop Audio. I'm using Arch Linux with KDE/Plasma as the desktop and the current version of OBS.

How to lower volume on mac without sound