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Quarter-tones
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Medea
Aedem/Medea
Started Topics :
127
Posts :
1132
Posted : Mar 8, 2009 21:18:26
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I want to use quarter-tones in melodies. As far as i understand, MIDI can't allow to do it directly, but i think that there should be maybe some kind of VSTi plugin with built-in piano-roll with quarter-tones, or something like that.
I understand that I can pitch-shift, automate detune etc, but i would like to find an easier way.
Any ideas?
  http://soundcloud.com/aedem |
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TimeTraveller
IsraTrance Full Member
Started Topics :
80
Posts :
3207
Posted : Mar 8, 2009 21:22
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that would be some great challenge for some c++ programmers I guess and a special plug in for sure.
I have found a lot of things but afaik nothing goes without tuning shifting etc.
A bit hard imo.
A scrollbar with such a scale would be fantastic.
https://soundcloud.com/shivagarden |
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Freeflow
IsraTrance Full Member
Started Topics :
60
Posts :
3709
Posted : Mar 8, 2009 21:43
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cool....
such option should be implemented in all sequencers.. 
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 8, 2009 21:50
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ansolas
IsraTrance Full Member
Started Topics :
108
Posts :
977
Posted : Mar 9, 2009 00:42
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 9, 2009 01:31
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TimeTraveller
IsraTrance Full Member
Started Topics :
80
Posts :
3207
Posted : Mar 9, 2009 01:34
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 9, 2009 02:01
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Quote:
| AS1 MidEast is a small practical device which converts most MIDI keyboards into Middle East/Arabic scale instruments. General Music (GEM) keyboards will be polyphonic; non-GEM keyboards will be monophonic.
With AS1 MidEast, conventional keyboards can play Arabic scales and microtuned notes without radical panel layout modifications to include Arabic scale commands. In practice, AS1 MidEast is a controlling device which sends appropriate messages to the connected keyboard so that specified notes of the scale play one quarter of a tone below standard pitch, as required for Arabic Scale use.
AS1 MidEast is extremely user-friendly thanks to its 12 Arabic scale memories which store and recall any favorite setting, a display showing the status of the various functions, 'one-touch' commands and no complex programming tasks. It provides 3 modes of operation, allowing keyboards to play Arabic Scales, and has a wide range of uses, from the direct connection to a keyboard to more complex MIDI setups which include computers and sequencers. |
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http://www.myspace.com/realtimeproject |
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xoC
Cubic Spline
Started Topics :
10
Posts :
179
Posted : Mar 9, 2009 11:52
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In certain instruments (i'm thinking of the virus), you have a parametrer called "oscillator keyfollow" so if you set this parameter half of its value, you need 2 keyboard octaves for the sound going up only one octave, so the keys are every quarter tones instead of every semi tones. |
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 9, 2009 12:04
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indeed. this should be the solution 
... thanks a lot!!
taken from a manual of another VSTi, which i just googled:Quote:
| Key follow ratio can be set from 0% to 200%. 100% sets the pitch scale to the normal keyboard (a semitone). 200% comes to the whole tone (2 semitones) and 50% to the quatertone. Setting to 0% comes to the same pitch for all notes and the pitch is specified only by Pitch and Detune. |
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taken from the virus manual:Quote:
| Key Follow
-64 to +31, Norm, +33 to +63:
How much the pitch of oscillator 1 follows the keyboard (i.e. MIDI note number).
Press both Value buttons at the same time for normal tuning (Norm). |
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so value +32 equals 100% ...
and value 0 *should* be 50% (quarter tones).
http://www.myspace.com/realtimeproject |
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 10, 2009 01:00
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it seems a bit difficult to transform the scales to midi.
think i will have a look tomorrow
but i still wonder why not value 0 equals 100% ...
or does the virus have a higher downward resolution
for the key follow parameter / octave spread?
http://www.myspace.com/realtimeproject |
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Pythagoraz
TimeDrained / Pythagoraz
Started Topics :
8
Posts :
337
Posted : Mar 10, 2009 01:59
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 10, 2009 02:32
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with key follow value 0 for both OSC ... all the quarter tones should be available ...
just need to sort out which of the keys are members of the scale and which of them are not.
that scale-pattern should reach over 2 octaves,
but played by the virus within the same octave.
if somebody could send a cubase4 project with midi patterns of
mid east scales assigned to virus control v3, i would be very happy.
init patch in combination with a freq analyzer could be
useful to get the right notes ... or at least one base note.
probably should call a djinn to do the job http://www.myspace.com/realtimeproject |
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realtime
Started Topics :
5
Posts :
350
Posted : Mar 10, 2009 03:49
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xoC
Cubic Spline
Started Topics :
10
Posts :
179
Posted : Mar 10, 2009 14:03
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In fact, Value 32 is semitones, value 0 is no keyfollow (usefull for making kick sounding the same on all the keyboard) and value -32 is inversed semitones, so if you go up on the keyboard, the oscillator goes down, following the semitones resolution.
edit: better explained in the Virus C manual
"OSCILLATOR-1 KEY FOLLOW
Determines the intensity of the pitch control via the keyboard: At the value +32 (standard setting) the oscillator is controlled normally, i.e. the octave you are playing is identical to the oscillator
octave; at +63 every ascending octave you
play transposes the oscillator upwards by two
octaves (whole note scale); +15 transposes the oscillator upwards by one octave for every two ascending octaves you play (quarter note scale); at 0 the keyboard control option is off. Negative values generate opposite control intensities." |
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