I think I have fixed this. There was certainly a problem in the example and there may also have been a problem in the code. Both are now fixed. Please try with the new code and new example.

Regards,
Mike

that sounds much cleaner, Michael. 
I have taken a spectrum plot in Audacity and clean sine waves do show up.
Only on every lowest note 60 in the example of the padsynth i see an
aliasing on 23kHz that changes the view of the wave of the sine - does it
have to do with the sampling down of the created waveform? 
I have attached a screenshot:
lowest_note60.png
  

For me, it still still unclear how low i can go to avoid an audible aliasing
distortion. I have to do experiments with finding the right balance in the
Hz to be created in the padsynth gen:
oscillator_hz = desired_hz * (sr / padsynth_size / fundamental_hz)

for now,i will just throw in a lowpass filter of 16kHz to get rid of any
aliasing, as a standard.

And i think the example is great too. 

Thanks, Michael, for making the padsynth available in Csound. I just tried
it with the foscil opcode instead of the standard poscil, and it is great
fun!

I still have some thoughts about this gen and would like to contact you
off-list.




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Thanks as always for your work, Menno.

Do let me know your thoughts. I will think about the aliasing. Try different forms of oscil?

Best,
Mike