Well you know where you are in the file from the Sample Rate. If (say) there are 44100 samples per second, then to 44100th sample is at 1.0 seconds.
Also you can't perform an FFT on an individual sample - you'd do it on a block of samples (say 512).
Glad you found the pluralsight courses helpful :)
Also you can't perform an FFT on an individual sample - you'd do it on a block of samples (say 512).
Glad you found the pluralsight courses helpful :)