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ECE 3551 Microcomputer Systems

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.

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ECE 3551 Microcomputer Systems

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

  2. 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

  3. DSP effects • Effect one: No effect • 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

  4. Operation Modes • Mode one: No panning • 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

  5. 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

  6. 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

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

  8. 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

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