BOSS RC-20XL

["Andrew Kolbeck" <interstellar_andy@hotmail.com>]

Hi, first time poster here,

I just recently purchased the RC-20XL to play ambient soundscapes (delays 
and filters - this is my first foray into looping) and my only question 
is...

I can save a loop on Phrase 1, and keep overdubbing... But how do you get 
the phrase to 'move along'?  Is it possible to play phrase 1, keep it 
playing, and be recording into the phrase 2 setting so you can improvise a 
bit more with it and get a bit more natural progression of sounds?  Or do 
you have to have pre-recorded loops and mash them together, like 
sequencing? 
  Do the phrases HAVE to be recorded earlier or is there a way to record 
them on the fly?

I like how you can overdub until there's no tommorrow, but with just 1 
phrase to build on, how can you make the music take on a different idea?  
I 
guess that's my main beef.  If it can't do what I'm hoping, I'm going to 
return it.

Thanks a million,

Andrew.