Dividing an Octave into 12 equal steps is the most usual but not the only way to go.

I play around with alternate scales and tunings ... even I started playing the viola and the trombone for that reason.

Here are some links to useful theoretical and practical articles about the microtonal thing:

https://xenharmonic.wikispaces.com/ this is the absolute sourcepool for exploring the wide land of scales and tunings.

http://ziaspace.com/_microtonality/ a more practical approach.

http://www.microtonal-synthesis.com/ some more technical ressources.

http://cedillerecords.org/music/imag...018booklet.pdf a description of Easley Blackwood's microtonal etudes.

http://www.lastfm.de/music/Sevish some listenings.

http://www.soundclick.com/bands/defa...?bandID=104802 just listen to Mirror Walk and https://soundcloud.com/prent-rodgers...song-in-53-edo