User:Mousemambo/Document draft: Difference between revisions
Mousemambo (talk | contribs) refine and expand Scenarios |
Mousemambo (talk | contribs) removed outdated development notes, fix bad in-doc links |
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===Method 2: Set a tuning in the synth using a Scala scale file and keyboard mapping file=== | ===Method 2: Set a tuning in the synth using a Scala scale file and keyboard mapping file=== | ||
Probably the most common method people choose to retune a synth in a DAW by loading prepared tuning files. Tuning files provide all or most of the specification for a scale or tuning, and might be loaded using a drop-down selector or a file loading dialog. For this method, we use the example of a Scala scale file and keyboard mapping file, since the Surge XT synth supports the [[User:Mousemambo/Scala tuning system|Scala tuning system]]. Very briefly, the scale file sets the intervals of the scale and the keyboard mapping file places the tuning base of the scale file on a specific MIDI note, sets the tuning reference note and pitch, and maps the notes to a keyboard or other controller. See the section "[[User:Mousemambo/Document draft#Scala scale and keyboard mapping files|Scala scale and keyboard mapping files]]" below for more about these tuning files. | |||
Probably the most common method people choose to retune a synth in a DAW by loading prepared tuning files. For this method, we use the example of a Scala scale file and keyboard mapping file, since the Surge XT synth supports the [[User:Mousemambo/Scala tuning system|Scala tuning system]]. Very briefly, the scale file sets the intervals of the scale and the keyboard mapping file places the tuning base of the scale file on a specific MIDI note, sets the tuning reference note and pitch, and maps the notes to a keyboard or other controller. See the | |||
'''Scenarios''' | '''Scenarios''' | ||
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'''''Scala scale and keyboard mapping files''''' | '''''Scala scale and keyboard mapping files''''' | ||
* [Say something about tuning files and what they do | * [This section needs extensive reconsideration and revision given the creation of a separate [[User:Mousemambo/Scala tuning system|Scala tuning system]] article. Keep only what needs to be here. -> This work is in progress.] | ||
* [Say something brief about tuning files and what they do. Mostly refer to the info located in the "[[User:Mousemambo/Scala tuning system|Scala tuning system]]" article.] | |||
*Note that without a Scala keyboard mapping file (.kbm) also loaded, the resulting tuning may not be what you expect. Surge XT like most synths will assume a default tuning center frequency and keyboard mapping that sets the first (implied) note of the tuning file -- the tuning base -- as MIDI Note C.60 and the tuning center (diapason, reference pitch) as international ISO standard pitch (MIDI A.69=440.000Hz). [Or will it? Seems undocumented. In fact, it '''does not'''. Default in Surge XT 1.2.3 is a tuning base note of C.60 and the reference pitch is C.60=261.626Hz, which is very close to but not exactly international standard because it uses three-digit precision. I've read that this (at 2-4 digit precision) is the most common default for retunable synths when you don't load a keyboard mapping file.] However, if for example we are using a just intonation scale and music with a tonic of F (F4, MIDI note 65, 349.23 Hz), it becomes critical that that tuning base note is set to the tonic F. Ideally we use a keyboard mapping file to do that, but if keyboard mapping files are not supported see the section "Alternative for setting the tuning base note and tuning reference." | *Note that without a Scala keyboard mapping file (.kbm) also loaded, the resulting tuning may not be what you expect. Surge XT like most synths will assume a default tuning center frequency and keyboard mapping that sets the first (implied) note of the tuning file -- the tuning base -- as MIDI Note C.60 and the tuning center (diapason, reference pitch) as international ISO standard pitch (MIDI A.69=440.000Hz). [Or will it? Seems undocumented. In fact, it '''does not'''. Default in Surge XT 1.2.3 is a tuning base note of C.60 and the reference pitch is C.60=261.626Hz, which is very close to but not exactly international standard because it uses three-digit precision. I've read that this (at 2-4 digit precision) is the most common default for retunable synths when you don't load a keyboard mapping file.] However, if for example we are using a just intonation scale and music with a tonic of F (F4, MIDI note 65, 349.23 Hz), it becomes critical that that tuning base note is set to the tonic F. Ideally we use a keyboard mapping file to do that, but if keyboard mapping files are not supported see the section "Alternative for setting the tuning base note and tuning reference." |