Matching Items (6)
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- All Subjects: Violin
- Creators: Rogers, Rodney
- Member of: ASU Electronic Theses and Dissertations
- Status: Published
Description
There are a significant number of musical compositions for violin by composers who used folk songs and dances of various cultures in their music, including works by George Enescu, Béla Bartók and György Ligeti. Less known are pieces that draw on the plethora of melodies and rhythms from Turkey. The purpose of this paper is to help performers become more familiar with two such compositions: Fazil Say's Sonata for Violin and Piano and Cleopatra for Solo Violin. Fazil Say (b. 1970) is considered to be a significant, contemporary Turkish composer. Both of the works discussed in this document simulate traditional "Eastern" instruments, such as the kemenҫe, the baðlama, the kanun and the ud. Additionally, both pieces use themes from folk melodies of Turkey, Turkish dance rhythms and Arabian scales, all framed within traditional structural techniques, such as ostinato bass and the fughetta. Both the Sonata for Violin and Piano and Cleopatra are enormously expressive and musically interesting works, demanding virtuosity and a wide technical range. Although this document does not purport to be a full theoretical analysis, by providing biographical information, analytical descriptions, notes regarding interpretation, and suggestions to assist performers in overcoming technical obstacles, the writer hopes to inspire other violinists to consider learning and performing these works.
ContributorsKalantzi, Panagiota (Author) / Jiang, Danwen (Thesis advisor) / Hill, Gary (Committee member) / Rogers, Rodney (Committee member) / Rotaru, Catalin (Committee member) / Arizona State University (Publisher)
Created2013
Description
Efficiency of components is an ever increasing area of importance to portable applications, where a finite battery means finite operating time. Higher efficiency devices need to be designed that don't compromise on the performance that the consumer has come to expect. Class D amplifiers deliver on the goal of increased efficiency, but at the cost of distortion. Class AB amplifiers have low efficiency, but high linearity. By modulating the supply voltage of a Class AB amplifier to make a Class H amplifier, the efficiency can increase while still maintaining the Class AB level of linearity. A 92dB Power Supply Rejection Ratio (PSRR) Class AB amplifier and a Class H amplifier were designed in a 0.24um process for portable audio applications. Using a multiphase buck converter increased the efficiency of the Class H amplifier while still maintaining a fast response time to respond to audio frequencies. The Class H amplifier had an efficiency above the Class AB amplifier by 5-7% from 5-30mW of output power without affecting the total harmonic distortion (THD) at the design specifications. The Class H amplifier design met all design specifications and showed performance comparable to the designed Class AB amplifier across 1kHz-20kHz and 0.01mW-30mW. The Class H design was able to output 30mW into 16Ohms without any increase in THD. This design shows that Class H amplifiers merit more research into their potential for increasing efficiency of audio amplifiers and that even simple designs can give significant increases in efficiency without compromising linearity.
ContributorsPeterson, Cory (Author) / Bakkaloglu, Bertan (Thesis advisor) / Barnaby, Hugh (Committee member) / Kiaei, Sayfe (Committee member) / Arizona State University (Publisher)
Created2013
Description
The two solo violin works by Carl Nielsen (1865-1931) have been largely overlooked since their composition in the 1920s. These pieces are representative of Nielsen's mature style, combining elements of classical form (the Theme and Variations) as well as processes more commonly found in the twentieth century (through-composition and non-tonal harmonic language). This paper is designed to bring these long-neglected works to light and make them more approachable for violin students, teachers and performers. As Denmark's leading composer, Nielsen was well regarded in his lifetime, although his isolation from mainland Europe created obstacles in his path toward international fame. Rather than following trends in post-romantic music, he remained true to his own musical ideals. This choice often isolated him further during his career, but his unique blend of chromatic harmony, driving rhythms and juxtapositions of character captivates modern listeners. Although small in scope compared to his symphonies and other large works, the enthusiastic spirit and indomitable energy of the solo violin works reflect Nielsen's character at its best. Combining a high level of virtuosity with solid structural integrity, textural variety and musical interest, these works deserve a much more prominent place in the standard violin repertoire.
ContributorsVallier, Michelle Mitchell (Author) / McLin, Katherine (Thesis advisor) / Rogers, Rodney (Committee member) / Jiang, Danwen (Committee member) / Bailey, Wayne (Committee member) / Landschoot, Thomas (Committee member) / Arizona State University (Publisher)
Created2012
Description
Class D Amplifiers are widely used in portable systems such as mobile phones to achieve high efficiency. The demands of portable electronics for low power consumption to extend battery life and reduce heat dissipation mandate efficient, high-performance audio amplifiers. The high efficiency of Class D amplifiers (CDAs) makes them particularly attractive for portable applications. The Digital class D amplifier is an interesting solution to increase the efficiency of embedded systems. However, this solution is not good enough in terms of PWM stage linearity and power supply rejection. An efficient control is needed to correct the error sources in order to get a high fidelity sound quality in the whole audio range of frequencies. A fundamental analysis on various error sources due to non idealities in the power stage have been discussed here with key focus on Power supply perturbations driving the Power stage of a Class D Audio Amplifier. Two types of closed loop Digital Class D architecture for PSRR improvement have been proposed and modeled. Double sided uniform sampling modulation has been used. One of the architecture uses feedback around the power stage and the second architecture uses feedback into digital domain. Simulation & experimental results confirm that the closed loop PSRR & PS-IMD improve by around 30-40 dB and 25 dB respectively.
ContributorsChakraborty, Bijeta (Author) / Bakkaloglu, Bertan (Thesis advisor) / Garrity, Douglas (Committee member) / Ozev, Sule (Committee member) / Arizona State University (Publisher)
Created2012
Description
Despite the growth of technology in music composition and performance, professional clarinetists maintain that air microphones are superior to piezoelectric pickups. Pickups offer increased mobility, isolation, and reduced feedback, but air microphones are used simply for the perceived sound quality. In this study a ported barrel pickup and a contact transducer pickup placed at various intervals on the clarinet were sampled and compared to a reference recording to determine how the sound differed for each method. In addition, the history of wind instrument pickups, the acoustics of the clarinet, and the basics of piezoelectricity were discussed to help examine the results. The pickups were examined in three ways: overall level in decibels, frequency cutoff, and overtone displacement. Through these results it was determined that the most accurate methods of clarinet pickup are the ported barrel pickup, contact transducers closer to the vibration of the reed such as the ligature or barrel surface, or a transducer placed at the end of the bell. These findings were consistent with the discussions regarding history, clarinet acoustics, and piezoelectricity. This study also produced a reference for the sounds associated with different pickup methods, as well as possible improvements for clarinet pickup design.
ContributorsEnglert, Patrick William (Author) / Spring, Robert S (Thesis advisor) / Gardner, Joshua T (Thesis advisor) / Caslor, Jason (Committee member) / Rogers, Rodney (Committee member) / Arizona State University (Publisher)
Created2018
Description
Puerto Rican composers Hector Campos Parsi (1922-1998) and Jack Delano (1914-1997) form an integral part of the nationalistic school of composition that revolutionized the island during the mid to late twentieth century. They both sought to combine Western Classical composition techniques with folkloric and traditional musical elements from Puerto Rico. In doing so, not only did they transform the way Western Classical music was made on the island, but they also brought validation and recognition to Puerto Rico’s culture as well as folkloric and popular musical heritage. Furthermore, both of these composers wrote works for violin and piano that form an important part of Puerto Rico’s musical legacy.
This research document presents biographical studies of both composers, as well as studies of Hector Campos Parsi’s Sonatina No. 2 for Violin and Piano, and Jack Delano’s Sonata for Violin and Piano. In addition, this document includes the first ever printed edition of Jack Delano’s Sonata for Violin and Piano, as well as a copy of the out of print Peermusic edition of Campos Parsi’s Sonatina No. 2 for Violin and Piano. This document also presents detailed charts of discrepancies and corrections to both scores.
With the gathering and presentation of this biographical and musical information, this research document seeks to bring international recognition to two important Puerto Rican nationalistic composers, Hector Campos Parsi and Jack Delano; spark an interest in their two little-known works for violin and piano (Campos Parsi’s Sonatina No.2 for Violin and Piano and Jack Delano’s Sonata for Violin and Piano); as well as make these two works more accessible to performers, educators, and the general public alike.
This research document presents biographical studies of both composers, as well as studies of Hector Campos Parsi’s Sonatina No. 2 for Violin and Piano, and Jack Delano’s Sonata for Violin and Piano. In addition, this document includes the first ever printed edition of Jack Delano’s Sonata for Violin and Piano, as well as a copy of the out of print Peermusic edition of Campos Parsi’s Sonatina No. 2 for Violin and Piano. This document also presents detailed charts of discrepancies and corrections to both scores.
With the gathering and presentation of this biographical and musical information, this research document seeks to bring international recognition to two important Puerto Rican nationalistic composers, Hector Campos Parsi and Jack Delano; spark an interest in their two little-known works for violin and piano (Campos Parsi’s Sonatina No.2 for Violin and Piano and Jack Delano’s Sonata for Violin and Piano); as well as make these two works more accessible to performers, educators, and the general public alike.
Contributorsde Sandino, Ayisha Elisabeth Moss (Author) / Jiang, Danwen (Thesis advisor) / Rogers, Rodney (Committee member) / Solís, Ted (Committee member) / Swartz, Jonathan (Committee member) / Arizona State University (Publisher)
Created2018