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    Specialists agree today, I think, that Mersenne was among the very
    firsts to have described beating (and, for that matter, harmonic
    partials). His knowledge in this respect did not spread widely at
    first and even Sauveur's early 18th-century experiments puzzled many
    a musician, including Rameau who believed that the production of
    harmonic partials was caused by resonance. It is not sure that
    Werckmeister knew much about harmonic partials and beating either.<br>
    <br>
    It goes almost without saying that musicians (Schlick included) had
    found long before Mersenne that tempered intervals produce a
    wavering or trembling effect. But the question is whether they
    realized that the wavering was caused by an interference between the
    partials. I certainly never claimed that interference may not
    describe what Schlick experienced. I only claim that we cannot be
    sure (and I believe that it is improbable) that he knew that the
    cause of the fluctuation was interference.<br>
    <br>
    The word Schweben describes the effect, but it says nothing of the
    cause.<br>
    <br>
    Nicolas Meeùs<br>
    <a class="moz-txt-link-abbreviated" href="mailto:nicolas.meeus@paris-sorbonne.fr">nicolas.meeus@paris-sorbonne.fr</a><br>
    <br>
    <br>
    <br>
    <br>
    Le 16/09/2010 19:46, JAY RAHN a écrit :
    <blockquote cite="mid:543058.98002.qm@web88103.mail.re2.yahoo.com"
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              <p class="MsoNormal">Returning to my original query,
                namely, whether Schlick
                (1511) is the earliest account of interference (i.e.,
                slow undulation or
                faster, phenomenally fused beating), I would emphasize
                that my (and others’)
                understanding was premised on the contrast between
                schwebend and gerade as between wavering and straight.<o:p></o:p></p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <p class="MsoNormal">On the basis of an entry in a
                contemporary online
                German-English dictionary, Nicolas Meeus originally
                claimed that schweben means
                “to float.” However, the dictionary he cited is a
                general dictionary, not a
                dictionary of music, and it lists the following
                additional translations for schwebend:
                floating, hovering, pending, soaring, suspended,
                wavering, breezing, poising,
                impending, unadjusted, undetermined. All the same, he
                insisted that to claim
                that Schlick was referring to beats (or, even more, to
                an interference between
                harmonic partials) would be farfetched.</p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <p class="MsoNormal">Subsequently, Nicolas admitted that
                schwebend/gerade may
                correspond to wavering/straight but suggested that the
                most neutral translation
                would be something like unstable/stable, which, he felt,
                may or may not connote beats and went on to say
                that interference may or may not describe what Schlick
                experienced.</p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <p class="MsoNormal">Thereupon, Reinhart Frosch pointed
                out that in a
                contemporary German-English music dictionary the first
                translation of Schwebung
                is “beat, beating” and Martin Braun emphasized that in a
                context of musical
                acoustics Schwebung and schweben exclusively mean “beat”
                and “to beat.”
                Contrary to Nicolas, Martin went on to say that ‘if one
                wants to understand why
                the Germans called this oscillation “Schwebung,” one has
                to look into the
                history of the word. The meaning “deviation” [which
                Nicolas suggested as a
                substitute] is not part of this history, but, for
                example, “flying” and
                “hovering” are.’<o:p></o:p></p>
              <p class="MsoNormal"><span style=""> </span></p>
              <p class="MsoNormal">Since Nicolas regards Werckmeister’s
                1691 account of tuning
                as relevant to Schlick, I think it is worthwhile to
                point out the following, to
                which a colleague has drawn my attention: </p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <ol style="margin-top: 0in;" start="1" type="a">
                <li class="MsoNormal" style="">According to MGG 13,
                  216-17, Mersenne (1636-37) said a tempered 5<sup>th</sup>
                  should schweben once per second. His terms in the
                  Harmonie universelle are trembler (to tremble, to
                  vibrate) and battre (to beat). Leaving aside the
                  question of just how quickly tempered 5ths would
                  tremble, vibrate or beat throughout the entire gamut,
                  Mersenne’s specification of a rate would seem to
                  indicate a rate of interference.</li>
                <li class="MsoNormal" style="">Subsequent to
                  Werckmeister, but earlier than various 19<sup>th</sup>-
                  and 20<sup>th</sup>-century general and technical
                  music dictionaries, Johann Christoph Adelung’s
                  Grammatisch-kritisches Wörterbuch (1793-1801) 3,
                  1617-18, gives the following for Schocken:<o:p></o:p></li>
              </ol>
              <p class="MsoNormal" style="margin-left: 0.5in;">1)
                Stoßen, Franz.<i> chocquer,</i><span style="font-style:
                  normal;"> <span style="background: none repeat scroll
                    0% 0% yellow;">Engl.
                  </span></span><span style="background: none repeat
                  scroll 0% 0% yellow;"><i>to shock</i></span><i>;</i><span
                  style="font-style: normal;"> in welcher Bedeutung es
                  noch in einigen gemeinen
                  Sprecharten, besonders am Nieder-Rheine, gangbar ist.
                  2) <span style="background: none repeat scroll 0% 0%
                    yellow;">Hin und her bewegen, schweben</span>;
                  schaukeln, welches das Intensivum oder Diminutivum
                  davon ist. <span style="background: none repeat
                    scroll 0% 0% yellow;">Ein Schiff schocket, sagt man
                    in
                    Nieder-Deutschland, wenn es von einer Seite zur
                    andern wankt</span>, wovon man
                  im Hochdeutschen schaukeln oder schwanken gebrauchen
                  würde. Jemanden schocken
                  oder schockeln, ihn schaukeln, daher in einigen
                  Gegenden die Schaukel auch
                  Schockel genannt wird. <o:p></o:p></span></p>
              <p class="MsoNormal">Adelung’s understanding of schwebend
                seems more like
                wavering or hovering than like floating, suspended, etc.
                To be sure, in
                contemporary English, hovering can mean hanging
                suspended in the air or
                remaining in an uncertain or irresolute state, but it
                can also mean wavering,
                fluctuating, or remaining in one place in the air by
                beating the wings.</p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <p class="MsoNormal">In any event, deviating does not seem
                to have occupied a
                place in the history of musical schwebend. Granted,
                instability overlaps some
                of its uses, but this instability is consistent with
                motion in general, and in
                particular with repeated change of position, albeit
                within a larger region, as
                in Mersenne’s trembling/vibrating and beating.</p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <p class="MsoNormal">Jay Rahn, York University (Toronto)</p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
              <p class="MsoNormal"><!--[if !supportEmptyParas]--> <!--[endif]--><o:p></o:p></p>
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