lposcila — Read sampled sound from a table with optional 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 - 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.