on this page i present the basic details, in language and in soundfiles, that you would need to write for the udderbot; specifically, for me the udderbotswain. because most of the sounds presented here are unduplicated by others, i cannot make claims towards a performance standard or pedagogy. only suggestions.
this is a picture of the alto udderbot i'm using at the moment:
i've been using this one because it was leak free (until yesterday). as far as alto udderbots go, this is your standard model. the "normal" register has a range of over three octaves. between bottles, the upper limit is pretty fixed, while the lower limit is determined by exact bottle size (corona extras will get you down to f#). click the notation to hear the glissando:
in order to execute the continuous sweep i have to gradually move my lower lip forward, making the opening smaller, and direct my airstream more downward, to prevent spillage (which we will call splooing). this practice, which i'm going to call choking, results in an airier timbre and a lowering of pitch, all without changing the water level:
without the use of choking, it is possible (with this shape of bottle at least) to perceive a break between ranges, exemplified in this clip of a softer glissando. as long as we're talking about ranges, it is worth mentioning the altissimo register, produced by blowing with more pressure in just the right way. This makes it possible to play a 5-octave C major scale on the tenor udderbot!
this range does not have a fixed-interval relation to the ordinary register and is not standard across bottle sizes. further research is needed, also on the timbre of the instrument. in lieu of more extensive knowledge, i offer this page of spectral analyses. (notyet!)
other members of the family include picobot, the tenor udderbot, and the contrabot (yet to be built). their respective mugshots and ranges: