On OSX Music, window>equalizer. You can also grab Rogue Amoeba’s “SoundSource” to have volume controls for every noise-generating app on the computer, and apply effects chains to them, including EQ.
I love SoundSource so much. I bought it so I could use the volume keys on my keyboard to adjust the system volume on my HDMI monitor. I was blown away when I found out I could plug my collection of VSTs into the output pipeline.
Great, thanks very much. All their products look useful.
I've tried Sound Source and not only do the eq's work, but I can boost the volume so I'm listening at 6/10, where before I was at 9/10 and had no headroom.
I knew I'd get an answer by saying something wrong on the internet.
