lposcila — Read sampled sound from a table with looping and high precision.
ar -- output signal
aamp -- amplitude
kfreqratio -- multiply factor of table frequency (for example: 1 = original frequency, 1.5 = a fifth up , .5 = an octave down)
kloop -- start loop point (in samples)
kend -- end loop point (in samples)
lposcila is the same as lposcil, but has an audio-rate amplitude argument (instead of k-rate) to allow fast envelope transients.