I am implementing a device to record heartbeats using a stethoscope and condensor microphone. I am able to record the sound as a .wav file. Once I store the wav sound in a matlab variable, how do I pass it through a lowpass filter, say the Savitzky-Golay filter. How would the parameters look like
y = sgolayfilt(x,order,framelen)
y = sgolayfilt(x,order,framelen,weights)
y = sgolayfilt(x,order,framelen,weights,dim)
These are the ways we can call the filter, where would the .wav variable fit?
