Lab06 - G UITARS D RUMS AND C OMB F ILTERS 6 Electrical Engineering 20N Department of Electrical Engineering and Computer Sciences University of

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Unformatted text preview: G UITARS , D RUMS , AND C OMB F ILTERS 6 Electrical Engineering 20N Department of Electrical Engineering and Computer Sciences University of California, Berkeley HSIN-I LIU, JONATHAN KOTKER, ANDREW LEE, HOWARD LEI, AND BABAK AYAZIFAR 1 Introduction In this lab, we will explore further applications of the filters that we have seen so far in lectures, discussion sections, and previous lab sessions. In particular, we will use a comb filter to create the sound of a guitar string being plucked, and we will use other filters to make this sound as realistic as possible. Also, with a small modification, we can use the same model to create drum sounds. Along the way, we will explore dif- ferent features of the impulse response and the frequency response of these filters. The methods discussed in much of this lab were formulated by Karplus and Strong [ 1 ]. 1.1 Lab Goals • Implement further practical applications of discrete-time filters in LabVIEW . • Explore relationships between sampling frequency, fundamental frequency, and delays. • Get acquainted further with subVIs and LabVIEW LLBs to make block diagrams cleaner and clearer. 1.2 Checkoff Points 1. Pre-Lab Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (a) Sound Mechanics of String Instruments: Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (b) Phase Response of Comb Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (c) Moving between Frequency Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (d) Checkoff Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(10%) (e) Submission Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (f) Submission Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. In-Lab Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (a) Guitar Hero: A Good Guitar Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (45 minutes, 15%) (b) That Can’t Be Real (Get It?): A Better Guitar Simulation . . . . . . . . . . . . . . . . . . . . . .(30 minutes, 15%) 1 (c) I Can’t Believe It’s Not a Guitar String: An Even Better Guitar Simulation . . . . (45 minutes, 15%) (d) Creating a SubVI (e) I Need Some Feedback (f) Marching To A Different Drummer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (30 minutes, 10%)....
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This note was uploaded on 03/18/2012 for the course EE 20N taught by Professor Ayazifar during the Spring '08 term at University of California, Berkeley.

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Lab06 - G UITARS D RUMS AND C OMB F ILTERS 6 Electrical Engineering 20N Department of Electrical Engineering and Computer Sciences University of

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