Hi,
I'm having a devil of time trying to get trig functions to create audio output with their characteristic waveshapes.

There was an approach called the "hand-coded" sin, Ex.

sr    =    44100
kr    =    4410
ksmps    =    10
nchnls    =    1
0dbfs  = 1
 
 instr 1
itwopi = 3.14
a1 phasor 440
a2 = sin(itwopi*a1)
out a2

Also by substitution using other trig functions in addition to the sin functions.  But I cannot seem to get this work again and have tried changing command flags, k-rate, num of channels, pi value etc.  but nothing seems to yield a true sine.  The negative portion of the wave shape is linear (looks like a V) instead of exponential (U).

I tried a simple lfo opcode and that works fine, but I'm stumped on what may have happened to "hand-coded".  I'm using a libcsound64, but I've tried it on 32-bit machine also using libcsound.

I'm not sure what may have changed. 

Any help or clues appreciated.

Regards,
Jim Hearon