References
- Howard DM, Angus JAS. Acoustics and psychoacoustics. 4th ed. Oxford: Focal Press; 2009.
- Meffen J. A guide to tuning musical instruments. Newton Abbot, Devon: David and Charles: 1982.
- Hagerman B, Sundberg J. Fundamental frequency adjustment in barbershop singing. Journal of Research in Singing. 1980;4:3–17.
- Bohrer JCS. Intonational strategies in ensemble singing. PhD Thesis. University of London; 2002.
- Howard DM. A capella SATB quartet in-tune singing: evidence of intonation shift. Proceedings of the Stockholm Music Acoustics Conference, SMAC-03, 2; Stockholm, 6–9 August 2003. p. 462–6.
- Ternström S. Choir acoustics: an overview of scientific research published to date. International Journal of Research in Choral Singing. 2003;1:3–12.
- Vurma A, Ross J. Intonation accuracy when singing in ensemble. Proceedings of the Conference on Interdisciplinary Musicology, CIM04; Graz, 15–18 April 2004. p. 160–1.
- Holmes JN. Speech synthesis. London: Mills and Boon; 1972.
- Flanagan JL. Speech analysis, synthesis and perception. Berlin: Springer Verlag; 1972.
- Flanagan JL, Rabiner LR, editors. Speech synthesis. Stroudsberg, PA: Dowden, Hutchinson and Ross; 1973.
- Klatt DH. Software for cascade/parallel formant synthesizer. J Acoust Soc Am. 1980;67:971–95.
- Keller E. Fundamentals of speech synthesis and speech recognition. Chichester: John Wiley and Sons; 1994.
- Styger T, Keller E. Formant synthesis. In: Keller E, editor. Fundamentals of speech synthesis and speech recognition. Chichester: John Wiley and Sons; 1994. p. 109–28.
- Freeware software for sound synthesis. Available at: http://www.puredata.info (accessed 1 November 2012).
- Holmes JN. Formant synthesizers: cascade or parallel. Speech Communication. 1983;2:251–73.
- Fant G, Liljencrants J, Lin QG. A four parameter model of glottal flow. STLQPSR. 1985;2:119–56.
- Childers DG. Speech processing and synthesis toolboxes. New York: Wiley; 2000.
- Hardware system for controlling music and sound using human gestures. Available at: http://www.apolloensemble.co.uk (accessed 1 November 2012).
- Howard DM. Intonation drift in a capella soprano, alto, tenor, bass quartet singing with key modulation. J Voice. 2007;21:300–15.
- Howard DM. Equal or non-equal temperament in a capella SATB singing. Logoped Phoniatr Vocol. 2007;32:87–94.
- Boersma P, Weenink D. Praat: doing phonetics by computer [Computer program]. Version 5.3.32. Available from: http://www.praat.org/ (accessed 2 November 2012).
- Thorpe CW, Callaghan J, van Doorn J. Visual feedback of acoustic voice features for the teaching of singing. Australian Voice. 1999;5:32–9.
- Howard DM, Welch GF, Brereton J, Himonides E, DeCosta M, Williams J, et al. WinSingad: A real-time display for the singing studio. Logoped Phoniatr Vocol. 2004:29:135–44.
- Nair G. The craft of singing. San Diego: Plural Books; 2007.