Hey all, Let me just explain to you the background of my situation. I am taking a Circuits 1 course and we are nearly done with the semester. We have a bonus assignment that requires us to create a passive filter(either High/Low/BandPass or BandReject) inorder to filter a distortion in an audio file in the form of .wav The proffessor told us that this bonus assignment is beyond the scope of this course, and thus it will boost up our final grade upon completion. I need someone to guide me in the right direction. She uploaded 2 files, noisyspeech.wav and cleanspeech.wav. After hours of trying to mess around with MultiSim, I have yet to reach a solution to that. My gut feeling is that it will be a BandPass filter, hence I can use the Filter Wizard for creating that. Here are the files: Noisyspeech : http://www.tempfiles.net/download/20...isyspeech.html Cleanspeech : http://www.tempfiles.net/download/20...eanspeech.html After reading the chapter on Frequency Selective Circuits (Chapter 14, Electric Circuits, Nilsson & Riedel). I think that the filter I need to create is a Bandpass Filter since the human voice has a certain range of frequency, 85 to 155 Hz, hence I will need 2 cuttoff frequencies for the Bandpass filter inorder to filter out the noise in the speech file. I will be using the Filter Wizard, by selecting the Bandpass filter option. My question remains as to how to input the .wav file on MultiSim Thanks in advance, and please find the speech files attached.