How do "dstdimstart,dstdimend,srcdimstart, srcdimend" work...

Hi,

Sorry, I'm a newbie to max/msp/jitter. Can anyone please explain how dstdimstart/dstdimend, srcdimstart/srcdimend in jit.matrix work. I can't get them to do what I think they are supposed to do, so I'm not really sure what they're doing. I'm trying to make a waterfall (sonogram) display similar to what I thing the recipe book example fftcollector does, in the jit world (I know the spectroscope will do that, but not what I'm trying to do).....So I"m not even positive if that's what fftCollector is doing. My eventual goal is to get a 3d view of a waterfall display kind of like an isosurface with a matrix mapped onto it and then then a series of 512k spectrums hopping along the surface. Or propagating in time along the surface, if that helps. I know that you MSP/MAX gurus can probably do that with a couple of msp/jitter objects on a simple patch, but I very new to this, and haven't figured out how to use the many zillions of nuances of MAX. So I'm not even sure if the above features of a jit.matrix (the dimstart/end....features) will help me or not.

The documentation is pretty scattered as far as giving clear information about what particular attribute do....

Thanks much,

Brian