Hi,

    This question goes to the more math enlightened of the list :-)

    I have to make an audio noise generator that has to repeat a narrow band
noise over and over again. I have enough memory to hold 0.5 segs of noise.
My problem is that when I get from the end to the begining of the cycle I
always get a click on the sound output. I have already tried to apply a
number of "windowing" functions ( Hamming, Kayser and etc.)  to try to make
the begin and end of the noise to be as close to each other as possible but
it has not worked ! I also have tried to match it by hand with wave editors
and have not been able to get good results !

    The question is : Is there any way to generate white noise, filter with
3 db by octave filters and make it so that the begin and end of the wave can
be tied together without generating and audible click ??? I need 16000
samples at 32K sample rate. I never imagined that human audition would be so
sensitive to phase differences !!

    I have really tried all the ways I can imagine and would really
apreciate any help you guys could give me.

Best regards,
Alexandre Guimaraes

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics