[music-dsp] Downsampling?

[Leon]

how about lowpass filter your original sample rate signal to half of your intentional (ie about 11k)
then simply pick every second sample?

eg 

original sound -> lpf (@11kHz - FIR if want, but slow) -> read only every 2nd sample -> final sound

about the source code re filter - others here will be MUCH better at that (i only _used_ to be able to get linear phase FIR lowpass ;-)

-----Original Message-----
From:	ronald [SMTP:ronald at ion.com.au]
Sent:	Thursday, June 08, 2000 12:59 PM
To:	music-dsp at shoko.calarts.edu
Subject:	[music-dsp] Downsampling?

Hi all,
        I have searched and searched and haven't found ANY c source code

(or any code) to do 'downsample' data by 2.

I need to downsample 44100Khz data to 22050Khz.
I can do this using programs such as Cooledit but I need the source code

because it is not the only thing i wish to do with the data.

Any help would be greatly appreciated.

Ronald



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