ECE 3551 Microcomputer Systems Donald L Troup Dr. Veton Kepuska 12/11/2009

Guitar Amplifier with Pan Effect Project: Electric Amplifier with Two Effects: Delay of 3 ms Reverberation Also includes a Pan Mode No pan Counter-clockwise pan Clockwise Pan

DSP effects Effect one: No effect Effect two: Delay of 3 ms Input to output, no modification Effect two: Delay of 3 ms Uses a buffer to add previous signal values to current values and produce a delayed sound Effect three: Reverberation Uses a delay but decreases signal values as they are added to produce reverberation

Operation Modes Mode one: No panning Mode two: Counter-clockwise Pan Simple straight audio output Plays on all speakers Mode two: Counter-clockwise Pan Rotates in a counter-clockwise direction on the four speakers Mode three: Clockwise Pan Rotates in a clockwise direction on the four speakers

Speed Options Button 3: Increases speed of pan Increases speed of pan by decreasing the period of Timer0 Applies to both counter-clockwise and clockwise rotation LED’s also rotate at the increasing speed

Speed Options Button 4: Decreases speed of pan Decreases speed of pan by increasing the period of Timer0 Applies to both counter-clockwise and clockwise rotation LED’s also rotate at the decreasing speed

Results Problems implementing the delay Delay problems overcome Gain issues Buffer issues Delay problems overcome Implementation of dynamic panning very successful

Results Things to change or add: More digital effects Volume controls Gain controls Bandwidth filters: Treble, Mid, Bass More panning speeds Fade in/out effects Distortion effects