Monday, November 7, 2016

Smallest Audio Spectrum analyzer "TI TMS320 DSP FFT Implementation" 96x16 OLED display

In this quick little demo i will show you real time 256 point audio band spectrum analyzer, i will be using ezdsp5502 board , which has TMS320VC5502 and for input signal sampling we are using onboard audio codec TLV320AIC3204B to sample input signal at 48Khz sampling rate. its  post is not going to be tutorial for FFT , the scope of this post is only to show how to get contentious input sampling ,FFT calculation and display on the little FFT Display.
with 48khz sampling  256 point FFT, we can see up to 22Khz singal in our 128 point FFT result ,  with resolution of 171 Hz for output point each point.