Keenan Pepper escreveu: [...] > I'm looking at the source of abc2midi and I can't figure why you would > say (1 to 4096) / (1 to 4096). The numerator and denominator can be > larger than 4096.
Yep, I should be written that the *final* _quantised_ pitchbend is 1/4096 semitone resolution. Thus one can use (1 to 8192) / (1 to 8192) in 0-2 semitones range to access the full range step by step. [...] >>Is ``NUM'' an integer? A float? What is its valid range? > > > It should be an arbitrary-precision integer but in practice it would > be unreasonable (and unnecessary) to expect applications to handle > numbers larger than 32-bit ints. Correct. [...] > What is the motivation for restricting the range of values in the ABC format? Compatibility between applications. ABC standard should say the values normally a program can accept. Is 'unsigned short int' your suggestion for ``NUM''? >>Unfortunately, ``NUM'' from 1 to 4096 will call for 24 bits to store the >>fraction. To store both numerator and denominator in a 16 bit variable >>instead, the range must be 1 to 256. > > > What format are you talking about here? In the ABC file they are > stored as decimal numbers. What about score generators like abcm2ps? The number of accidental glyphs is limited, should it quantise also the fractions? Currently, abcm2ps accepts (1 to 256) / (1 to 256) because it identifies the used accidentals with a single unsigned 16 bit integer. Of course, if we define that numerator and denominator are both 16 (or 32) bits length, that code shall be changed accordingly. [...] > I think the ABC format specification should be arbitrary fractions, > perhaps with a reasonable limit to prevent integer overflow. What > applications _do_ with information the ABC file is a different matter. > For example, abc2midi will obviously have to round the pitches to the > MIDI tuning standard. This should not affect the ABC format. Agree. Hudson -- '-------------------------------------------------------------------. 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/
