[fazool]

I might suggest another idea as well.

One thing our ears & brain do is sort of "get used to" volume. So when things are very quiet, we can perceive a whisper. But when things are loud, like a rock concert the next song isn't a shock.

So, after a while, something loud doesn't seem as loud. It's like climbing into a hot tub or a cold pool. Its a shock at first, but then your brain and nerves get "used to it".

So one contributing factor might be that, at the beginning of your set, you are noticing your volume, but as the set goes on, your ears and brain get used to that volume and ratchet up, THINKING its quieter.

It's like being in a hot tub. When you first get in it feels scorching, but after a little bit it doesn't feel that way anymore, so you think its getting cooler and you turn up the heat.

That's only one more contributing factor - not the primary cause.

But one way you might consider addressing this is to wear earplugs or in-ear monitors, it might give a more consistent feedback to your ears.

I suppose that's only true if the volume is high to begin with.

Just thinking out loud here.......