I have a couple of fv-1 builds that I'm about to start putting together. Rather than using the suggested 32768Hz watch crystal I would like to try a variable oscillator to adjust the sample rate. There is a schematic at the bottom of this page:
http://www.spinsemi.com/knowledge_base/xtal.htmlHowever, some components are specifically labeled. If anyone would like to come up with a layout, I would be very appreciative.