University Madrigal Singers, June 2, 1976

Concert program for University Madrigal Singers, June 2, 1976

The University Symphony Orchestra, December 3, 1976

Concert program for The University Symphony Orchestra, December 3, 1976

University Symphony Orchestra, January 30, 1977

Concert program for University Symphony Orchestra, January 30, 1977

University Symphony Orchestra, February 25, 1977

Concert program for University Symphony Orchestra, February 25, 1977

University Chorale, March 1, 1977

Concert program for University Chorale, March 1, 1977

University Sinfonietta, March 3, 1977

Concert program for University Sinfonietta, March 3, 1977

The Studio Jazz Ensemble, The Western Washington State University Workshop Band, The University of Washington Contemporary Group Jazz Ensemble November 23, 1977

Concert program for Studio Jazz Ensemble, Western Washington State University Workshop Band, The University of Washington Contemporary Group Jazz EnsembleNovember 23, 1977

"UW Sings!": University Singers, Women's Choir, Men's Glee Club June 4, 2013

Concert program for "UW Sings!": University Singers, Women's Choir, Men's Glee Club June 4, 2013

University Symphony and Student Soloists in a Concerto Concert, January 13, 1963

Concert program for University Symphony and Student Soloists in a Concerto Concert, January 13, 1963

University Wind Sinfonietta, July 21, 1964

Concert program for University Wind Sinfonietta, July 21, 1964

University Concert Band, December 6, 1964

Concert program for University Concert Band, December 6, 1964

University Choir, Brass Choir and Madrigal Singers, April 17, 1962

Concert program for University Choir, Brass Choir and Madrigal Singers, April 17, 1962

The University Symphony Orchestra, January 26, 1982

Concert program for The University Symphony Orchestra, January 26, 1982

Increasing the variability of centre frequency locations in multiple-band sigma-delta modulators via the use of fractional delay filters

This paper presents the design analysis of novel tunable narrow-band bandpass sigma-delta modulators, that can achieve concurrent multiple noise-shaping for multi-tone input signals. This approach utilises conventional comb filters in conjunction with FIR, or allpass IIR fractional delay filters, to deliver the desired nulls for the quantisation noise transfer function. Detailed simulation results show that FIR fractional delay comb filter based sigma-delta modulators tune accurately to most centre frequencies, but suffer from degraded resolution at frequencies close to Nyquist. However, superior accuracies are obtained from their allpass IIR fractional delay counterpart at the expense of a slight shift in noise-shaping bands at very high frequencies.