A virtuosic bird I recorded during summer some years ago is singing in Channel 2 in Granular mode, processed by a Bandpass Filter with key follow. Control it's volume with Macro 3 and the sample speed with with Macro 4, add Filter modulation with Macro 8 and control the Modspeed with Macro 12. I resynthed that bird in Metasynth and played back the resynthed audio with some Flagolet guitar samples (from my soundset Warped Strings for Alchemy) tuning the resynthed data to a customized pitch scale and then filtering it with a crazy picture file. That resynthed texure plays in Channel A, control the Highpass Cutoff with Macro 5, Filter Cloud Balance with Macro 6 and Filter Mod speed (LFO controlled Bandpass) with Macro 7. Sample speed for Channel 1 is controllable with Macro 2. The grain size for both samples can be tweaked with Macro 1, the Modwheel adds random pitch modulation to the grains of both samples. With Macro 14 you can control the Master Lowpass Cutoff. The Pipe FX in the FX section has Macros 9-11 assigned.
Check the LFO page for further modulation sources and targets.
The download folder contains two patch formats: ksd (old Absynth) and nab (new Absynth).