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blue hell
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Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
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Posted: Mon Mar 10, 2014 5:51 pm Post subject:
What is a cent ... |
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I am looking at implementing a scala scale reader for a synth thingie I'm working on ... and I got a bit confused about what a cent is ...
I see it being defined as 1/100 semitone, 1/1200 octave or 2 ^ ( 1 / 1200)
This seems to be based on an octave spanning a factor of two with 12 semitones .. yet scala would be free of such presumptions, in particular an octave in scala could be any factor it seems (and saw some examples if it being 3/2 or 3). And of course there can be any number of notes in such an octave.
Would the cent scale with the octave definition .. like when an octave is a factor of three instead of two .. would the cent change too, and if so .. how?
Or is a cent just always 2 ^ ( 1 / 1200) ... in the example scaling files I looked at this seems to be the case.
Can someone deconfuse me please _________________ Jan
also .. could someone please turn down the thermostat a bit.
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varice
Joined: Dec 29, 2004 Posts: 961 Location: Northeastern shore of Toledo Bend
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Posted: Mon Mar 10, 2014 10:15 pm Post subject:
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Notes, octaves, major tones, minor tones, semitones, cents, thirds, fourths, fifths, sevenths,… pitches,… frequencies… no wonder that anyone could get confused…
Hmmm… It seems to me that it would way too confusing if each scala file could have a different definition of a cent.
It makes more sense that scala files would use a single definition. Since it appears that the main purpose of scala is to retune note pitches to other than the standard default twelve tone equal temperament scale, it would be practical to base the definition a cent deviation as being 1/100 semitone of that twelve tone equal temperament scale. _________________ varice |
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blue hell
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Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
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Posted: Tue Mar 11, 2014 3:04 am Post subject:
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I would be very practical indeed! _________________ Jan
also .. could someone please turn down the thermostat a bit.
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GovernorSilver
Joined: Apr 26, 2004 Posts: 1349 Location: Washington DC Metro
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320
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Posted: Wed Mar 12, 2014 5:39 pm Post subject:
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Yes .. in my own files I could use ratios .. but there are many pre-made tunings using cents .. would like to be able to use those ...
I'm looking at the scala mapping stuff too.
Made some code which allows me to calculate with rationals, and implemented prime vectors too. With all conversions between the number systems .. rational, real and prime vectors. Some basic testing seems to indicate it all works properly.
Now need some stuff for .. mapping .. indeed and cents to fractions etc.
It all is for this thingie BTW.
Anyway .. I'll just try some stuff with cents when the time is there ... should just trust my ears then I guess _________________ Jan
also .. could someone please turn down the thermostat a bit.
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seraph
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Joined: Jun 21, 2003 Posts: 12398 Location: Firenze, Italy
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Posted: Thu Mar 13, 2014 3:55 am Post subject:
Re: What is a cent ... |
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Blue Hell wrote: | is a cent just always 2 ^ ( 1 / 1200) ... ? |
I would say so! _________________ homepage - blog - forum - youtube
Quote: | Don't die with your music still in you - Wayne Dyer |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320
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Posted: Thu Mar 13, 2014 4:24 am Post subject:
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Thanks Carlo! _________________ Jan
also .. could someone please turn down the thermostat a bit.
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