Not getting the full 16 increments when adjusting volume on Ventura

I'm not getting the full 16 increments when adjusting sound on Ventura. Here's what happens when I increase the volume from zero, step-by-step. Step 1: Audio output goes to 0.082 (As seen in Audio Menu in System Settings or in MIDI app) Step 2: Still 0.082 Step 3: 0.184 Step 4: 0.327 Step 5: Still 0.327 Step 6: Still 0.327 Step 7: 0.51 Step 8: Still 0.51 Step 9: Still 0.51 Step 10: 0.735 Step 11: Still 0.735 Step 12: Still 0.735 Step 13: Still 0.735 Step 14: 1.0 Step 15: Still 1.0 Step 16: Still 1.0 So as you can see, instead of the 16 incremental volume steps I should have, I only get 7, which is not enough. Any idea why this is happening or how I can fix it? Here's my system: - Mac mini 2020 (M1) - Ventura 13.3.1 - KEF LSX II speakers (connected through USB-C).