sound card problems

[Ta©ti Tac0Z 2]

(useing comutrionics sound card)

so = require("component").sound

for i = 1,5 do
	if i == 5 then
		i = -1
    end
  
    so.clear()
  	so.setWave(1,i)
  	so.delay(1000)
  
  	so.process()
  	os.sleep(1.1)
end

this little program plays all the defrend wave modes but the problem is it sems to play some at the same time (yes you heard me in the end it plays noise and sqaure and sine and triangle at the same time) why is this? there is a os.sleep(1.1) to sleep before playing a new one? so why is it doing that?

 

EDIT: before you ask i have a:

for i = 1,8 do
	so.close(i)
end

to make sure that all channels is closed before the program plays (and so.open(1) is executed right after ofcurse)

[Ta©ti Tac0Z 2]

some body? please? Fingercomp?