Hi, I am a little confused with fourier-transforms, math not being my specialty. In essence all I am trying to do is take 1 second samples of an audio file and print out coordinates as follows: - amplitude at 80Hz, amplitude at 200Hz, amplitude at 1000Hz I have set up a file connecting: SndBuf buf => dac; buf => FFT fft => blackhole; And now I assume that I set the fft.size to 1024 samples (for a 44k 16bit audio file) and then upchuck that every 1024 samples. Most likely my error is there... But now I don't know how to get at the correct output. I have a ton of polar values but I don't really know what any of them correspond to. Some sample values: "time: 0:5000.0000" : (string) %(0.0140,-0.9985*pi) %(0.0004,-0.6629*pi) %(0.0001,-0.4812*pi) %(0.0001,-0.4412*pi) %(0.0001,-0.7007*pi) %(0.0001,-0.7549*pi) %(0.0001,-0.5928*pi) %(0.0000,0.7277*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) "time: 0:6000.0000" : (string) %(0.0189,0.0008*pi) %(0.0003,0.4507*pi) %(0.0001,0.2899*pi) %(0.0001,0.2122*pi) %(0.0001,0.3072*pi) %(0.0000,0.5483*pi) %(0.0001,0.1053*pi) %(0.0000,0.2292*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) "time: 0:7000.0000" : (string) %(0.0148,0.9997*pi) %(0.0002,0.4662*pi) %(0.0002,0.1996*pi) %(0.0001,0.4250*pi) %(0.0001,0.2651*pi) %(0.0001,0.4396*pi) %(0.0000,0.9036*pi) %(0.0001,0.4967*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) %(0.0000,0.0000*pi) Can someone help? I bet this is actually pretty simple I just can't seem to figure it out. I understand the notion of polar coordinates and know how I can convert them to Cartesian. But what I am not understanding is where I find out what the actual frequencies that are being sampled are... Thanks - J -- ---- vomc8one@gmail.com ----