Jean-Yves,

sin(x - n*pi)
So now the problem can be how these large numbers are obtained
--> a=1e16+1
--> a-1e16
of course equals zero.

Yes, I've thought about it and you are right, above 1e16 x is so sparse, cycle-wise speaking, that my original intention doesn't make much sense.

Besides, at a sample rate of 44100, and a maximum frequency of 22050 Hz, a phase of 1e16 is reached only  after 2288 years, so it's not a practical problem!

I must confess, by the way, that because of a stupid interpretation of some results on my part, I thought an error I was having was due to the slow departure from strict discrete signal periodicity but it wasn't. Sorry!

Regards,

Federico Miyara

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