Pitch % maximums,what's the acceptable limit?

It’s up to how creative and adventurous you are feeling. I am old school and I get squirmish if we go more than 3-4 bpm up or down.

There are some technical limitations, like the amount of work the CPU has to do as the difference becomes bigger is increasing (a lot). At some point there can be audible artifacts from the key-lock processing happening.

And then there is the “feeling” of a track. Especially well-known tracks. I always feel something is “off” when the speed difference becomes to big. So I always fear the audience could be feeling the same.

Again, if it fits some creative urge, go with it. It may just work out. I’ll stick to my 3-4 bpm though. Anything more than that is needed? There are few other tricks than straight beatmatching we have in our toolbox, right?

Greetinx.

Then you should get better monitor speakers 😉

That is a PA speaker not a monitor. (Speaking in studio terms.)
Of course you can use the 312A as a stage or booth monitor, but it does not qualify (sound quality wise) as a nearfield monitor for studio/home DJ use.

So no it is not a good nearfield flat response monitor and a rather average (sound quality) quality PA speaker, that is however high efficiency (aka it is very loud for its power rating).

One of the things I discovered early on was to have enough music to move up (or down) in small changes in BPM. Back before Keylocking a track digitally I’d absolutely hate the sound of a track sped up or slowed down dramatically.

I know, right! Although playing black sabbath at 78 …. well … 🙂 Some claim to have seen the devil himself!