Thanks to all for your help & suggestions
Here is a list -- so far -- of major sources on music origins, for those interested.

                Music Origins & Impulses -- General Bibliography
                            A preliminary list, alphabetically:

        Allott, Robin, "The Biological Bases of Music" -- from "The Pythagorean Perspective," http://www.percepp.demon.co.uk/pythagor.htm 
        "Ancient and Oriental Music," Ed.: Egon Wellesz (Vol . I of "The New Oxford History of Music"), London: Oxford University Press, 1957 .
        Aristotle Problems Book XIX. 11, 12, 13, 29, 33, 36, 42.
        Aristoxenus "The Elements of Harmony" I.23.
        Baltzell, W. J., "A Complete History of Music," N.Y.: Theo. Presser 1905. 
        Bauer & Peyser, "How the Music Grew," N.Y.: G.P. Putnam's Sons, 1939.
        Darwin, Chas., "The Origin of Species & the Descent of Man" [Felt music preceded & led to speech.]
        Dumbrill, Richard, "The Musicology and Organology of the Ancient Near East"
        Edgerly, Beatrice, "From the Hunter's Bow," N.Y.: G. P. Putnam's Sons, 1942.
        Engel, Carl, "The Music of the Most Ancient Nations," London: Wm. Reeves, l929 
        Finkelstein, S., How Music Expresses Ideas N.Y.: Int'l Publ., 1952. 
        Fink, Bob, "The Origin of Music" [Formerly "The Universality of Music"], N.Y.: Greenwich, 1970, 1981. [See also: http://www.webster.sk.ca/greenwich/natbasis.htm]
        Fink, Bob, "Neanderthal Flute," Canada: Greenwich, 1997.
        Fraser Sir Jms. Geo., "The Golden Bough," N.Y.: Macmillan Co., 1960.
        Grout, D. J., "A History of Western Music," N.Y.: W.W. Norton & Co., 1960.
        Gustin, Molly, "Tonality," N.Y., Philosophical Libr., 1969.
        Helmholtz, Hermann, "On the Sensations of Tone," N.Y.: Dover Publ ., 1954.
        Horniman Museum, "Musical Instruments," London: Horniman Museum London Cty. Council, 1958.
        Howard & Lyons, "Modern Music," New Amer. Libr., 1958) .
        Jeans, Sir James, "Science and Music," Cambridge: at the University Press, 1937.
        Kilmer, Anne D., Crockett, Richard L. & Brown, Robert R., "Sounds From Silence," Berkeley: Bit Enki Publications, 1976 [Oldest known song.]
        Merriam, Alan, 'African Music' in "Continuity and Change in African Cultures," ed. by Boscomb & Herskovitz, Chicago: U. of Chic. Press, 1959.
        Merriam, Alan, "The Anthropology of Music," Northwestern U. Press, 1964,
        Meyer, LB., "Emotion and Meaning in Music," U. of Chicago Press, 1956 .
        "Moussterian Bone Flute," Ed.: Ivan Turk, Llubljana: Institute za archeologijo, 1997 [Oldest known instrument]
        Nettl, Bruno, "Music in Primitive Culture," Cambridge: University Univ. Press, 1956.
        "The Origins of Music," [Compilation of essays.] Ed.: Wallin, Merker and Brown (MIT Press, Cambridge, MA., 2000)
        Pleasants, N., "The Agony of Modern Music," N. Y.: Simon & Shuster, 1955.
        Plekhanov, Geo., "Unaddressed Letters -- Art & Social Life," Moscow: Foreign Lang. Publ. House, 1957 .
        Raymond, G. L. , "The Genesis of Art Form," N.Y.: G.P. Putnam's Sons, 1909.
        Reti, Rudolph, "Tonality, Atonality, Pantonality," London: Rockliff, 1958.
        Sachs, Curt, "History of Musical Instruments," N.Y.: W.W. Norton, 1940.
        Sachs, Curt, "Our Musical Heritage," N.Y.: Prentis Hall, 1948.
        Sachs, Curt, "The Rise of Music in the Ancient World, East & West," N.Y.: W.W. Norton & Co., 1943.
        Sachs, Curt, "The Wellsprings of Music," N.Y.: McGraw Hill, 1965.
        Schellenberg, E. Glen & Trehub, Sandra, "Natural Musical Intervals -- Evidence from Infants," Psychological Science, 1996.
        Smith, Hermann, "The World's Earliest Music" London: Wm. Reeves, 1904.
        Strunk, Oliver, "Source Readings in Music History," N.Y.: W. W. Norton, 1950

        Thanks to others who made unique suggestions, which may be more or less relevant to the subject:

Cynthia T. Kimberlin <[log in to unmask]> suggested: 
        "Music as Culture" by Norma McLeod and Marcia Herndon. 2nd edition paperback edition was published in 1990 by MRI Press.
Joachim Landkammer <[log in to unmask]> suggested:
        Georg Simmel, "Psychologische und ethnologische Studien über Musik", published first in Lazarus´ and Steinthal´s "Zeitschrift für Völkerpsychologie und Sprachwissenschaft", vol. 13, 1882, 261-305 (now in vol. 1 of the Gesamtausgabe, edited by Klaus Christian Köhnke, Suhrkamp, Frankfurt am Main 1999, 45-89). [...a then ongoing debate concerning Darwin´s (and already Leibinz´s) thesis of the origin of language from music].
Ralph Locke <[log in to unmask]> suggested:
        George K Nepler's "Geschichte als Weg zur Musikversta" ndnis. (2 edns., nearly identical, I think.) 
Daniel B. Reed <[log in to unmask]> suggested:
        Alan Merriam's "Music of the Flathead Indians" and Bruno Nettl's "Blackfoot Musical Thought"
Stefan Drees <[log in to unmask]> suggested:
        With the beginning of "historical thinking" during the 18th century we find also interesting views about the origin of music, e.g.  Leopold Mozart, "Versuch einer gründlichen Violinschule" (1. Aufl. 1756), Einleitung, II. Abschnitt: "Von dem Ursprunge der Musik..." und "Versuch einer kurzen Geschichte der Musik" (§§ 5-8). Other examples may be found in the writings of Marpurg and others.
Izalii I. Zemtsovskii (Izaly Zemtsovsky) <[log in to unmask]> suggested a Russian source (w/english translations here):
        Izaly Zemtsovsky. Problema genezisa muzykal'nogo iazyka: (intonatsiia -- myshlenie -- kul'tura) [Toward the problem of the genesis of musical language: (intonatsia -- thought -- culture)]. In the book: "Problemy genezisa i spetsifikirannikh form muzykal'noj kul'tury. Tezisy dokladov konferentsii. Dilizhan, 24--30 oktiabria 1986" [The problems of genesis and specific character of the early forms of musical culture. Abstracts of the all-union conference which took place in Dilizhan, Armenia, 24--30 October, 1986]. Erevan: Akademiia nauk SSSR, Nauchnyj Sovet po istorii mirovoj kul'tury; Soiuz kompopzitorov Armenii; Institut iskusstv AN Armianskoj SSR [Academy of Sciences of the USSR, The scientific council for the history of world culture; Union of composers of Armenia; Institute of the arts of the Academy of Sciences of Armenian Republic], 1986, str. [pages] 34--37. 
--Candace Norton--

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