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I really appreciate your advise so far.what code were you talking about ,reading data from audio file and output to a .wav file?
hi dszabo,If you want to get your code working, I would strongly recommend creating a version of your code that runs on your PC such that your read data from an...
Update:-filter is definitely doing something, but for some reason its folding high frequencies. I've designed a lowpass filter with fc=200 and fstop=500 and sampling...
dszabo,1)For some reason filter is passing frequencies upto 4000hz or so, I've designed the filter coeff for bandpass of 20-200hz. Please look at the coeff i used...
dszabo,Thanks for the suggestions. I have made some great progress with the following changes in code. I main issue was over flow so then I reduced precision from...
dszabo, i'm using TMS320C5545 boosterpack dsp which is Fixed-Point Digital Signal Processor. I'm pretty new to dsp n digital filters, but I tried to convert the...
Volume decreases and distorts when filter is run,I've used the above scaling technique for coeffs. It still distorts, doesn't sound like the filter should actually...
here is the code for scaling of coeffs I did. But it still doesn't work  int N=269;     int i,n;     int index1=0;     int index2=N;     float x[2*269];...
bmoers,thanks for the reply,yes i didn't add the initialization part here.well data is int16 data type, i'm just assigning the sum to data1 and data2. isn't that...
i tried it but it didn't work :/
dszabo,you mean before the following code you want me to give, I2S_writeLeft(0) and I2S_writeRight(0)??code:-for ( sec = 0 ; sec < 30 ; sec++ ){for ( msec =...
Hi dszabo,I’m sure it’s not output saturation because audio loopback tst worked without distortion. Anyways I’m playing a audio song file as input from laptopCan...
Hi dszaboI’m using c5545 booster pack dsp which comes inbuilt with aic3206I’ve set codec sampling rate as 16khzI’ve tested audio line in loop back test and...
Hi bob,Thanks for your reply. I've used matlab fir1 function as shown in code below to find coefficients. I want to pass frequency between 20hz-200hz with 16khz...
I'm running the fir filter hamming window order 161 bandpass with pass frequency range 20hz-200hz,  but out put doesn't sound like the filter is working. it's just...

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