<div dir="ltr"><div class="gmail_extra">Hi Benjamin,</div><div class="gmail_extra"><br></div><div class="gmail_extra">The problem is the ambiguous/conflicting terminology in this sentence:</div><div class="gmail_extra"><br><div class="gmail_quote">On 27 August 2015 at 01:19, Benjamin Wolff Bohl <span dir="ltr"><<a href="mailto:bohl@edirom.de" target="_blank">bohl@edirom.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><span style="border:0px;font-family:inherit;font-size:14px;font-style:inherit;font-weight:inherit;margin:0px;outline:0px;padding:0px;vertical-align:baseline">meter.unit</span>
contains the number indicating the beat
unit, that is, the bottom number of the meter signature.</blockquote></div><div class="gmail_extra"><br></div><div class="gmail_extra">The problem is that in compound meters such as 6/8</div><div class="gmail_extra"> <a href="https://en.wikipedia.org/wiki/Meter_(music)#Compound_meter">https://en.wikipedia.org/wiki/Meter_(music)#Compound_meter</a></div><div class="gmail_extra">The "musical beat" is a dotted quarter note, while the MEI "beat unit" is an eighth note. Using the word "beat" in such a way is unfortunate as it can conflict with the musical definition of a beat, and this will continue to cause mis-interpretation of what a beat is.</div><div class="gmail_extra"><br></div><div class="gmail_extra">The duration of a beat is necessary for music analysis, since the treatment of dissonance and consonance is tied to the location of a note on or off of the beat. The musical beat is also needed to automatically beam notes. Implicit interpretation of the musical beat can be done with 6/8 by assigning it to be a dotted quarter note, but there are exceptions to this definition which would require a way of assigning an explicit duration to the musical beat.</div><div class="gmail_extra"><br></div><div class="gmail_extra">For example, the middle slow movements in a piano sonata may be labeled as 6/8, with the beat actually assigned to the eighth note, in which case the "musical beat" and the MEI "beat unit" are the same.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Another more common corner case would be time signatures such as 3/8. Is that a compound meter with one beat in a measure, or a simple meter with three beats in the measure (a variant on a 3/4 meter also possible in slow movements)? </div><div class="gmail_extra"><br></div><div class="gmail_extra">And of course in modern music with irregular meters such as 5/8, the musical beats in the measure may may have two beats as 3+2 eighth notes, or 2+3 or a mixture of both in different measures.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Compound meters resulted in a degeneration of mensural notation. Since modern rhythms are always "imperfect", to emulate a perfect mensuration dots are added to the notes (which would usually be implicit the mensural metric equivalent). These are represented as compound meters in modern notation (who knows why they did not invent "2/4." time signatures instead of "6/8" for such cases). The problem is that modern time signatures are ambiguous, since 6/8 could be considered like C-dot, or it could be considered as a non-compound meter with 6 beat at the eighth-note level.</div><div class="gmail_extra"><br></div><div class="gmail_extra">I whine to Perry every once in a while about this, so we can wait for his reply on how to disambiguate such cases...</div><div class="gmail_extra"><br></div><div class="gmail_extra">-=+Craig</div><div class="gmail_extra"><br></div></div></div>