[PD] making scales from frequency values

Andrew Faraday jbturgid at hotmail.com
Tue Jul 21 00:59:57 CEST 2009


I'll be honest, this sounds a bit advanced. It's logarithmic and thus beyond me.
However...
Perhaps try to find a list of just temperament or world music scales and their frequencies. See if any match up to the scale you're trying to achieve.

Andrew
> Date: Tue, 21 Jul 2009 00:52:24 +0200
> From: derek at umatic.nl
> To: jbeezez at googlemail.com
> CC: pd-list at iem.at
> Subject: Re: [PD] making scales from frequency values
> 
> Still not entirely sure I know what you're after, so at the risk of 
> repeating myself, use the (just intoned) intervals here:
> 
> 1, 1:1-unison;
> 2, 135:128-major_chroma;
> 3, 9:8-major_second;
> 4, 6:5-minor_third;
> 5, 5:4-major_third;
> 6, 4:3-perfect_fourth;
> 7, 45:32-diatonic_fourth;
> 8, 3:2-perfect_fifth;
> 9, 8:5-minor_sixth;
> 10, 27:16-pyth_major_sixth;
> 11, 9:5-minor_seventh;
> 12, 15:8-major_seventh;
> 13, 2:1-octave;
> 
> I.e. major third = 6:5, and 6 divided by 5 is 1.2, so to transpose up a 
> major third, multiply original frequency by 1.2.
> 
> Or, 5 divided by 6 is 0.83333333, so multiply by that to transpose down 
> a major third. Or cook up something with [expr] that does the job more 
> precisely, like [expr f$1 * (5/6)] etc etc...
> 
> All of these should "sound good" across the whole musical spectrum so 
> long as you don't plan on changing key ;-)
> 
> D.
> 
> J bz wrote:
> 
> > If I'm saying that these frequencies are 
> > 'good' to my ear, is there a way of creating equally 'good' sounding 
> > notes to fill in the gaps in, say for example, a 12 note scale based on 
> > these notes scaling from the lowest to the highest without doing the 
> > whole thing 'by ear'?
> 
> -- 
> ::: derek holzer ::: http://blog.myspace.com/macumbista ::: 
> http://www.vimeo.com/macumbista :::
> ---Oblique Strategy # 126:
> "Only one element of each kind"
> 
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