Generation of Pink Noise using 3dB/octave filters on digital white noise

bademiya wrote:
> Hi.
> 
> Once again, i have another query. I have written a program using Steve
> Park's rngs file. By reading the rngs file, i understand that the output,
> which is Random(), is any number between 0 and 1 in a double data type.
> However, the one given Andreas has a possible range between -1 and 1 if i
> set the amplitude as 1. 

   ...

Surely, you want zero mean. Why double? How many bits do you need?

Jerry
-- 
Engineering is the art of making what you want from things you can get.
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bademiya wrote:

>>Calculate the amplitude so that the output of the soundcard is at maximum
>>level. See my other posting.
> 
> Thanks for your help. However, i am not using a soundcard to generate the
> noise. I'm using the Analog Devices BF561 board to generate the white
> noise.

Then check the documentaion of this board for the maximum integer value
the DAC at the output can handle. Set the amplitude to this value.

bye
Andreas
--
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Thank you all for your help. It has been very useful to me so far. 

Just another query. When i generate white noise, how do i know or check at
what sampling rate am i sampling the white noise? As of now, i'm just
generating the noise as explained in my earlier posts. I just want to
estimate the bandwidth of my white noise generated. 

Amit.

bademiya wrote:

> Just another query. When i generate white noise, how do i know or check at
> what sampling rate am i sampling the white noise? As of now, i'm just
> generating the noise as explained in my earlier posts. I just want to
> estimate the bandwidth of my white noise generated.

If you clock out the generated data with fs, then in theory the bandwidth
is fs/2 (as defined by the Shannon theorem). In practice the bandwidth
will be lower due to the reconstruction filter behind the DAC. Check
the manual for these limits.

bye
Andreas
--
Andreas H�nnebeck | email: acmh@gmx.de
----- privat ---- | www  : http://www.huennebeck-online.de
Fax/Anrufbeantworter: 0721/151-284301
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