FFT of audio signal resolution

VelociChicken wrote:

> "Rick Lyons" <R.Lyons@_BOGUS_ieee.org> wrote in message 
> news:leqv96l1pgqif3pqgq8rebsj6q142m4952@4ax.com...
> 
>>On Sun, 26 Sep 2010 10:54:13 -0500, Vladimir Vassilevsky
>><nospam@nowhere.com> wrote:
>>
>>
>>>
>>>vivu91 wrote:
>>>
>>>
>>>>Hi,
>>>>I have a doubt which might be very basic.
>>>
>>>[...]
>>>
>>>
>>>>Please help i need the solution for this as quickly as possible.
>>>>
>>>>Vivek
>>>
>>>If not this last demanding phrase, I might have helped you.
>>>Do you have money to pay for the solution as quickly as possible?
>>>
>>>VLV
>>
>>Hi Vladimir,
>>  Ha ha.  I agree with you.
>>
>>What's the Russian word for "manners"?
>>
>>No need to answer, I couldn't pronounce the
>>answer anyway.
>>
>>[-Rick-]
> 
> 
> He just sounded a little desperate to me, and he did say 'please.'

Did you help him?
Could you help him?
Is it possible to help the one who lacks the very very basics yet got 
himself involved is something way above his comprehension?

> Calling other people stupid, or often replying with money demands is an 
> example of good manners, I suppose?

It is not about people, it's about chickens. The best chickens are good 
at is a chicken stew.

> This is not called 'pro.comp.dsp' - if you don't want to discuss with or 
> help people, then simply don't reply.

There are other places, like alt.stupid.idiots, for example. You will be 
certainly welcomed to preach good manners there.

> Thanks.

Thanks, but no thanks  (c) Sara Palin

VLV

>Did you help him?
>Could you help him?
>Is it possible to help the one who lacks the very very basics yet got 
>himself involved is something way above his comprehension?
>VLV
>
Hey all I am asking for is a little guidance. I am stuck in a college
without great professors and I am trying to learn everything on my own. So
I was thinking comp.dsp could help thats all! Its not like I dont know a
thing. My basics are a little confused because what we learn in college
here in India is not a great approach to strong fundamentals. Any help you
could provide would be helpful. And thanks again to all who have provided
answers. They were very helpful

>Did you help him?
>Could you help him?
>Is it possible to help the one who lacks the very very basics yet got 
>himself involved is something way above his comprehension?
>VLV
>
Hey all I am asking for is a little guidance. I am stuck in a college
without great professors and I am trying to learn everything on my own. So
I was thinking comp.dsp could help thats all! Its not like I dont know a
thing. My basics are a little confused because what we learn in college
here in India is not a great approach to strong fundamentals. Any help you
could provide would be helpful. And thanks again to all who have provided
answers. They were very helpful

On Sep 25, 11:18&#4294967295;am, "vivu91" <vivu91@n_o_s_p_a_m.gmail.com> wrote:
> Hi,
> I have a doubt which might be very basic. I am currently working on a
> project. In that i input a test audio signal of 1.5 seconds in which the
> actual audio is of only 0.5 seconds or so. The sampling frequency is 44100.
> I am currently using a hanning window and the pwelch command in matlab to
> find the frequency spectrum. However I am using a hanning window of size
> 128 and that gives me a resolution of only 173Hz or so. I would like to
> improve the resolution to 1hz or so. I am only interested in the
> frequencies at which the peaks occur the actual magnitude is irrelevant.
>
> I thought of increasing window size but was not sure whether that would
> improve the resolution or increase noise.
>
> Any suggestions or help along these lines would be extremely helpful.
> I tried reading through a few books all the books seem to suggest to
> improve resolution to pad with zeros. The problem for me is that I have a
> long enough duration signal but am not sure if i take a large window size
> if resolution improves or noise is added.
>
> Please help i need the solution for this as quickly as possible.
>
> Vivek

Try interpolating the data to increase the number of points and use a
much larger window. Or pad with zeros on both sides and don't use a
window at all. Generate test signals + AWGN noise to test.

Tom