Krinklesack, The calculator allows you to find out the component values required to run a tighter frequency range. That's the info that I need, I just don't have excel. I think you input what frequency you want on the main page, click 'go' on the LTC1799 section and the component values pop-up. If you could input 18000khz and let me know the value components I need, I'll give you all the karma in the world and I'll also share my results with the world... which I should probably do anyway :p
Crusty Paul, it's defo a ceramic resonator. It's the same make as the one in the casio sa-1 I just opened, but not the same value. The SA-1 won't pitch with the ltc1799 either, but does with crystal replacement. The numbering on the SA xtal was 09 1, so maybe it doesn't correspond with the frequency output. I should probably invest in an oscilloscope.