Hi there,
Check the spec of the controller, but you should find a pair of 'octave shift' buttons to 'up' the range an octave and 'down' the range an octave each time they are pressed. I have a very old (and very small) novation basstation synth I use as a controller with this facility).
I maybe wrong but I believe that sometimes it can be a software option, but the buttons make it really easy to change whilst playing.
Buying second hand would be an option for a budget. My Basstation is now 'vintage' LOL, so prices are silly, but a more modern controller might be much cheaper, just look for one that doesn't look like it's been gigged.
I'd check out a load of specs and decide what else you need and choose a couple that fit (maybe aftertouch for example - see chart link below). Downloading a manual if one is available from the manufacturer before buying is worthwhile too. Simply google the name of the controller and .PDF - that usually gets one if it's out there.
I did a quick google and came up with this:
http://www.sweetwater.com/shop/keyboards/keyboard-controllers/buying-guide.php It has a short and simple what to look for guide.
Here is an excellent comparison chart
http://kellysmusic.ca/chart/compchart.asp?chartid=1 Not sure how up to date it is, like I say, mine is vintage - like me! ;-)
(before you ask I am not connected to either company!)
Good luck.
Steve
post edited by ukmoonlitknight - 2012/07/08 02:21:58