2 Mar
2025
2 Mar
'25
12:46 p.m.
Hello all,
Anyone familiar with Scala files ?
After reading <https://www.huygens-fokker.org/scala/scl_format.html>
one questions remains.
For scales with 12 notes in an octave, to which note does the
first (implicit ratio 1.0) pitch refer ?
I assume this is C, not A.
That would mean that a software instrument having a control
to set the absolute 'A' pitch should shift the entire scale
so that the 'A' pitch is the one set by that control.
Is this the correct interpretation ?
Ciao,
--
FA
2 Mar
2 Mar
4:25 p.m.
On 2025-03-02 12:46, Fons Adriaensen wrote:
Hello all,
Anyone familiar with Scala files ?
After reading <https://www.huygens-fokker.org/scala/scl_format.html>
one questions remains.
For scales with 12 notes in an octave, to which note does the
first (implicit ratio 1.0) pitch refer ?
I assume this is C, not A.
you assume correctly. At least that is what the scala reference
implementation does [1]. Though one can specify or override this in a
.kbm file[2].
The example there shows middle C (MIDI note 60) as root note, and uses A
440 as reference pitch.
--
robin
[1] https://www.huygens-fokker.org/scala/help.htm#SET_MIDDLE
[2] https://www.huygens-fokker.org/scala/help.htm#mappings
3 Mar
3 Mar
10:30 a.m.
On Sun, Mar 2, 2025 at 12:46 PM Fons Adriaensen <fons(a)linuxaudio.org> wrote:
Is this the correct interpretation ?
Exactly. If you're looking for some ready-made code, I have some Lua code
here: https://bitbucket.org/agraef/pd-smmf/src/master/lua/sclsyx.pd_lua.
This also shifts the tuning in the way you described in order to keep the
concert pitch at 440 Hz.
This is for a Pd external, but it should be easy to turn the sclsyx:read
and sclsyx:convert methods to stand-alone functions to read an octave-based
scala tuning and convert it to an MTS 1 or 2 byte scale/octave tuning sysex
message.
Albert
--
Dr. Albert Gr"af
Computer Music Research Group, JGU Mainz, Germany
Email: aggraef(a)gmail.com, web: https://agraef.github.io/
10:44 a.m.
Hi Robin and Albert,
Thanks for the info !
Exactly. If you're looking for some ready-made
code
It's already coded. I needed this for the new zita-at2
that will be released at the LAC. I hope to see both of
you there !
BTW, I'm still looking for good vocal samples to test !
Ciao,
--
FA
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days inactive
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3 comments
3 participants
participants (3)
-
Albert Graef -
Fons Adriaensen -
Robin Gareus