Keenan Pepper escreveu: > On 2/8/06, Hudson Lacerda <[EMAIL PROTECTED]> wrote: [...] >>(a) ^1/31 ^2/31 ^3/31 ... (to refer to the ET and can use several ones) >> >>(b) ^1/5 ^2/5 ^3/5 ... (a whole tone corresponds to 5 degrees of 31ET) > > > Don't these conflict with the current meaning in abc2midi? I think it > would be better to define a whole new syntax, than to make something > that looks like the current syntax but means something different. > Ambiguity should be avoided at all costs.
Yes, there is a conflict. My idea was to maintain the current syntax (in the exact way I have used it so far with abcm2ps =P ), because this seems easier to do than make a new one. The next step is to think about possible ``whole new'' syntaxes. [...] >>- Other representations like scale degree number or ASCII versions of >>Sagittal accidentals cannot be used in a pure ABC file. One can always >>use a perl/ed script or a preprocessor (like abcpp) to convert them to >>valid ABC code. > > > Good point. If people always use preprocessors for microtonal music, > then it would make sense for ABC to have a simple and unambiguous > syntax that's not necessarily convenient, such as the present > fraction-of-a-semitone system. > On the other hand, this contradicts the > basic principle that ABC is designed to be read and written by > humans... The statement above is intended to maintain ABC backwards compatibility. For instance, one cannot use letters like I L M N O P R S T U for BP scale, because letters out of a-g/A-G are user defined decorations. Sagittal accidentals like |\ or \!!/ conflicts with barlines and other ABC symbols. So, we have to stick with a-g and A-G for the base pitches (plus accidentals). We need to find a simple (and spartan) way to notate microtones. [...] >>For an equal tempered scale, one can: >> >>- Define the tuning for the base pitches C D E F G A B (pitches C and c >>are equivalent mod N, but N doesn't have to be the 2/1 octave); > > > I don't like that. Too confusing. What exactly is too confusing? [...] >>Then, we can obtain a notation like this, for 3 steps in a whole tone >>(e.g. 19ET), and using the ratio numerator for the steps: >> >>=C ^1/C ^2/C =D _1/ _2/D =C > > > For meantone-based temperaments like 19-edo, I would very much like to > use extended meantone notation, for example: > > C ^C _D D D^ _E E ^E F ^F _G G ^G _A A ^A _B B _C C Me too. We need to include this also (as enharmonics), *beside* integer notation. [...] >>To use several scales simultaneously, one can use the denominator as a >>scale identifier (note that derivations of = have a meaning here): >> >>=/19C ^3/24C ^2/48C ^2/31C >> >>Therefore, a default scale has to be set for a section/voice of music. >>(BTW, abcm2ps default denominator is 2 in ^/ or ^3/ accidentals.) > > > I don't like this because it conflicts with the fraction-of-a-semitone > notation and it's too complicated. [...] If we find a non-conflicting solution, I would like to have different scales defined at a moment, for later and possibly sumultaneous use. (Then, meantone-based ET need to be identified.) About the fraction-of-a-semitone question, I think it will not be frequently used, we can take advantage of this. Once a scale is defined, that meaning of the accidentals is overriden by the new one. I would prefer use only numbers instead of combinations of different characters. Some possibilities: ^1c ^2c ... steps of current scale ^33.3c ^66.6c ... cents ^1/4c ... semitone fraction ^1:19c ^2:19c or ^1-19c ^2-19c ... n_steps:scale_id Another question is related to the differences between score and midi output. In general, is good to have independent commands for each one. For example, I use in a piece different accidental glyphs for clarinet and guitar, although both are playing the same scale. Guitar notation is tied to the fingering relative to standard tuning, so I used ordinary accidentals with arrows. This is basically the same concept to have pure and mixed Sagittal accidentals for different instruments/goals. -- '-------------------------------------------------------------------. Hudson Lacerda <http://geocities.yahoo.com.br/hfmlacerda/> *Não deixe seu voto sumir! http://www.votoseguro.org/ *Apóie o Manifesto: http://www.votoseguro.com/alertaprofessores/ == THE WAR IN IRAQ COSTS == http://nationalpriorities.org/index.php?option=com_wrapper&Itemid=182 .-------------------------------------------------------------------' -- _______________________________________________________ Yahoo! Acesso Gr�tis - Internet r�pida e gr�tis. Instale o discador agora! http://br.acesso.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/abcusers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
