The easiest way I've found is to mix our tracks to 320 MP3s and play them on a laptop (but it could be done on a tablet as well). Others like to use MIDI live. Too complex for me; I'm a simpleton. grin

As for gear, that depends on:

How much money are you willing to spend?
How large are the venues you will be playing?
Do you want a small system or a full-blown PA?

We're a duo, playing mostly bars, so our needs might be different than yours. We're running two Yammy 15's on sticks, 2 12” Yammy floor monitors and an 18” JBL powered sub. QSC PLX1804 amp, dbx 2231 GEQ, Soundcraft EFX8 mixer, Peavey Classic 30 tube guitar amp, Fender Bassman 250/210 bass amp.
We use Shure Bets 87a condenser mics. Toshiba laptop into a Peavey USB-P box into mixer.

Takes a small trailer to haul it, and an hour to set it up, but it it will rattle the walls if I need to. shocked

If you're playing jazz sax in small rooms, you might be a good candidate for a Bose system.
Hope this helps.


Regards,

Bob