its hard to get simpler. jumping into musi theory can be overwhelming - the only thing i can say is you have to start by keeping a bunch of things in your head at once - rythm, melody, timing, chords, scales - but trust me one day you realize its all very simple and its all the same thing. you just cant put it all together until you have the whole thing in your mind.
but for now, heres some ideas.
turn on your mpc, hit record and overdub and listen to the click. the mpc starts automatically set to a 2 bar loop, at 120 bpm, in 4/4 time. so you will hear 8 clicks, four per bar. each click denotes a quarter note.
try changing the tempo from 120 to whatever you want. this is changing the length of a quarter note.
also notice the numbers at the top right of the screen. say the number reads 02:02:48. that means you are on bar two, quarter note two, and 48 ticks in. the mpc divides a quarter note into 96 ticks (this is called the timing resolution - with quantize turned off, a step will be 1/96th of a quarter note - so you can put sounds rather precisely anywhere in a sequence if you need to) so that 48 means you are halfway between beat 2 and beat three in the second bar. You are on a sixteenth note!
try counting out the beat. for two bars of 4/4 count
1,2,3,4,
2,2,3,4 . . . the count should land on the click and give a little emphasis to the numbers in bold. they are the 1's - and they are the most important. james brown famously told his band "i dont care what you do as long as you hit that one!" it gets really important when you have, like, a 16 bar loop - because the 1 on the first bar is like home base. you wanna hear it slam right in. your music can go all over the place but you always come home on the one.
(digression - what makes it sixteen bars is that you dont feel it repeating until every 16 bars. 4 reps of a 4 bar loop still feels like just that (4 reps), but if you have like a long keyboard melody you might end up with a 16 bar feel even if your drums repeat. basically, listen to some music and try to feel when that big 1 comes along - it takes a bit of listening at first but it soon becomes second nature, and its important) -
then you can try counting like this:
1 and 2 and 3 and 4 and 2 and 2 and 3 and 4. same deal - the numbers land on the clicks. now you are counting 8th notes.
and you can even go "1 e and a 2 e and a 3 e and a 4 e and a 2 e and etcetera". thats your 16th notes. at this point you'll realize why people dont usually count 32nd notes- cause your mouth dont work that fast!
then maybe try making a sequence. put a kick drum on the ones , the a's, and the threes, put a snare on the 2's and fours, and a hihat on all the ands. this might be a good exercise for you, as you may need to translate your count into beats and measures. if you do it right you'll have a simple little rap beat (try setting the bpms to like 98-100) and he fact that i could tell you to make that beat without hearing it speaks a bit on why you want to know your way around tsig.
p.s. any errors is because i aint near my mpc right now or cause im a dumbass some times
