u_bandpass1 - compute biquad coefficients for a bandpass filter (const skirt BW)
u_bandpass1q - compute biquad coefficients for a bandpass filter (const skirt Q)
u_bandpass2 - compute biquad coefficients for a bandpass filter (const peak BW)
u_bandpass2q - compute biquad coefficients for a bandpass filter (const peak Q)
u_cocollect - collect messages into a message and end each with a comma
u_collect - collect messages into a message
u_fade - remote fader control
u_follower - follower for messages delivered at constant rate 
u_highpass - compute biquad coefficients for a resonant highpass filter (BW)
u_highpassq - compute biquad coefficients for a resonant highpass filter (Q)
u_listdrip - serialise a list immediatly (i.e. list-drip)
u_listfilter - filter a list (i.e. list-filter)
u_listmap - map an operation to each list element (i.e. list-map)
u_listnth - output the nth element of a list (i.e. list-nth)
u_listreduce - reduce a list in pairs (i.e. list-reduce)
u_listser - serialise a list on demand (i.e. list-dripslow)
u_loadmeter - show CPU load
u_lowpass - compute biquad coefficients for a resonant lowpass filter (BW)
u_lowpassq - compute biquad coefficients for a resonant lowpass filter (Q)
u_makepoly - make midi-like instruments polyphonic
u_record - record audio data into tables
u_samplebank - load files into tables
u_samplebank2 - load stereo files into tables
u_sigm - sigmoid function for messaging squashing
u_splicetrans - transition splicer for bandlimiting jumps in waveforms
u_stereo - make stereo versions of effects
