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Full-Text Articles in Engineering
Digital Guitar Effects Pedal, Ian Charles Lang
Digital Guitar Effects Pedal, Ian Charles Lang
Electrical Engineering
The Digital Guitar Effects Pedal assists guitarists in creating music by implementing several useful functions. The pedal takes an analog input signal from an electric guitar, performs digital operations on it, and outputs a modified analog signal to an external guitar amplifier. Pedal functions include: an easy-to-use instrument tuner, a looper which records and plays back music segments, a tap tempo mode allowing easy synchronization with other instruments, and various guitar effects (distortion, echo, and vibrato, among other examples). The pedal user interface displays the current selected function, and allows easy switching between effects.
Electronic Drum Machine (E.D.M), Nyssa Marie Backes
Electronic Drum Machine (E.D.M), Nyssa Marie Backes
Electrical Engineering
Many people argue that a drummer plays the most important role in a band of any genre. During live performances, the other band members rely on the drummer to keep the song moving forward at a proper steady pace. Even in recorded music, drums help listeners sing and dance along with their favorite songs. Thus, achieving success as a band, both in terms of recordings and live shows, absolutely requires a drummer. So, if a band does not have a drummer, and cannot afford the hefty cost of hiring a session drummer, a touring drummer, or both, how can they …
General-Purpose Digital Filter Platform, Michael Cheng
General-Purpose Digital Filter Platform, Michael Cheng
Electrical Engineering
This senior project provides a platform for high-speed, general-purpose digital filter implementation. EE 459 currently implements digital filters using reprogrammable digital signal processor boards. These aging digital signal processors serially calculate each difference equation term. Operating at 1 Mega-sample per second, the new general-purpose platform simultaneously processes at least ten digital filtering difference equation coefficients. The platform also features an audio jack input and BNC connectors for viewing input and output signals. The filter digitizes single channel audio signals at 44.1 kHz sampling rate with 16-bit precision or 1 MHz sampling at 8-bit precision. The new reprogrammable platform includes a …
Music Synthesizer Senior Project: Individual Report, Bryan Bellin
Music Synthesizer Senior Project: Individual Report, Bryan Bellin
Electrical Engineering
No abstract provided.
Audio Dsp Amplifier, William Saba, Nicholas Barany
Audio Dsp Amplifier, William Saba, Nicholas Barany
Electrical Engineering
The key concept of this project is to create a microcontroller system that serves as an interface between a DSP board and a total of 4 amplifier channels. The fully integrated system will provide a fully inclusive audio DSP amplifier for use in 2.1 or bi-amplified stereo speaker setups. The project will focus on developing an intuitive interface that is operable from the device or a computer that programs the DSP board for various speaker applications. The finished design will provide a custom computer sound amplifier in one package, eliminating the need for multiple components by interfacing two stereo amplifiers, …
Digital Graphic Equalizer Implemented Using An Fpga, Anthony Giardina
Digital Graphic Equalizer Implemented Using An Fpga, Anthony Giardina
Electrical Engineering
A graphic equalizer is a device that adjusts the tonal quality of an audio signal. When sound is converted from a digital format to analog sound waves, there are amplification and transducing steps in-between the two formats. Common devices to perform these tasks are speakers, amplifiers, DACs, etc. Many of these devices exhibit a non-uniform frequency response over the range of human hearing. Thus, it is possible that certain frequency ranges of the audio signal will be amplified and others will be attenuated. To counteract this, an audio equalizer can be used to boost and attenuate certain frequency ranges within …
Digital Modulations Using The Universal Software Radio Peripheral, Daniel Keith Artis
Digital Modulations Using The Universal Software Radio Peripheral, Daniel Keith Artis
Electrical Engineering
Software defined radios (SDRs) are versatile systems that integrate hardware and software to create a reprogrammable wireless system. Due to the versatility and hardware requirements of a SDR, they are typically expensive and not always affordable for educational institutions. GNU Radio is a free software package that allows users to do signal processing on any computer using python and C++. Using the Universal Software Radio Peripheral (USRP) board in conjunction with a standard personal computer (PC), a RF daughterboard, and the GNU Radio software, we can create a software defined radio that can transmit, receive, and process signals. Because the …
Multicore, Multithreaded, Phase-Synchronous Fm Sound Synthesizer, Justin Tomlin
Multicore, Multithreaded, Phase-Synchronous Fm Sound Synthesizer, Justin Tomlin
Electrical Engineering
This project implements a phase-synchronous FM synthesis algorithm in hardware. Envelope and low frequency oscillator modulation of oscillator parameters is implemented. The microcontroller the system is based on, the XMOS XS1-G4, allows for physical parallelism including features such as multiple cores, multiple hardware threads on each core, a hardware event-driven thread scheduler, and channel, channel ends, and link switches for thread and core communication. The event-driven architecture of this device was ideal for implementing this synthesis algorithm. The final product is portable, durable, has a simple, intuitive user interface, and allows for extensive spectral shaping capabilities. The basic functional requirements …