Ok I am reading the manual thanks 
But just to save some time because there is a lot of reading, I have a few more questions I wondered if anyone on here could help me with:
I am struggling with only 4 channels for the piece I'm trying to replicate has many layers. I figured I would use the noise channel and make some percussion sounds in that, thinking that this would free up the 2 columns in the wave channel for me to use them for more melodies but I was wrong- unless you have a kit instrument selected, you only have 1 column in the wave channel. Is there any way around this, like, can you download kit instruments that have note sounds instead of drum sounds? Also, if I change the instrument in the noise channel to be a kit instrument, sometimes it gives me 2 columns, sometimes it only gives me 1, I am a bit confused.
In fact I am struggling to tell the difference between the pu channels and the wave channel full stop, what are they MEANT to be for, respectively i.e what is the best use for them? I tried making a nice sounding instrument in the wave channel but it seems weird and unpredictable unlike the pulse channel, and how come you can set pulse channel instruments to wave kit or noise, and wave channel instruments to pulse kit or noise etc... In what scenario would you want to be using a pulse instrument in a noise channel or a kit instrument in the pulse channel etc or are you just not supposed to at all? Sorry I found it a bit hard to explain my query here, i guess someone with a lot of experience might know the specific situations where this function would be useful.