mejo mahabang usapin yan bro. Try wikipedia. Determine kung ano-ano ba ang mga ipapasok nyo sa mixer, like ilang mics at ilang instruments. Kung nabilang nyo na, get a mixer na kayang iaccomodate ung number of mics/instruments. Ex.: Kung 5 mics and 7 instruments and isasaksak nyo eh bumili kayo ng 12 channel mixer. It wouldn't hurt to buy a mixert na me extra channels. And when you get to buy the mixer na, read and understand the manual.