Sound Control VS Loopback by RogueAmoeba

Not sure it has those specific features but you may want to check out Sound Control. Source: 10 months ago

SoundControl is exactly this and more: https://staticz.com/soundcontrol/. Source: 12 months ago

Hey, bro, I think I've found a solution: I installed the SoundControl software, enabled the "Force Soft Volume Control" option. Yay, the volume is now adjustable! Hope this helps you too! Screenshot. Source: about 1 year ago

I haven’t installed it yet, I’ve got a few days off and don’t want to waste the trial period. This is the one I bookmarked from the ones I found: https://staticz.com/soundcontrol/. Source: about 1 year ago

IDK whether a 3rd party software audio mixer would help; you may download a trial here: https://staticz.com/soundcontrol/. Source: over 1 year ago

No, it's very easy: https://existential.audio/blackhole/ Blackhole is Free and Open Source. Also, Rogue Amoeba has a product called "Loopback". It's not cheap, but it's another alternative: https://rogueamoeba.com/loopback/. - Source: Hacker News / 7 months ago

This is the basic idea, but there are other apps which can make it easier. I prefer using Audio Hijack for the EQ part and sending it to a pass-through device set up in Loopback (which, for this use case, functions the same as BlackHole). Source: 7 months ago

- Loopback 2 by Rogue Ameba to create a pass-thru from the soundboard (Farrago, also by Rogue Ameba) to Skype so everyone can hear me talking in addition to the soundboard on the same line. Source: 10 months ago

At the risk of further complicating matters, you could try combining sources or otherwise experimenting with Loopback, an app that's designed to do all kinds of audio routing stuff. Source: 11 months ago

You'll need an app that can make "virtual audio cables" to route sound between apps. On Mac, I used to use Soundflower but I think LoopBack is what the cool kids use now: https://rogueamoeba.com/loopback/. Source: 11 months ago