10.6

Table Of Contents
1052Logic Pro User Guide
Frequency correction takes place on the basis of analyzed chord structures. The positions
of individual notes in each chord are analyzed, and the sum of each note’s distance to the
tempered tuning scale is zeroed. In critical cases, different compensation functions help to
minimize the degree of retuning, at the expense of absolute purity, if necessary. For example:
The notes C, E, and G form a C Major chord.
To harmonically tune these, the third (the E) needs to be tuned 14 cents higher (a cent
is 1/100th of a tempered semitone) and the fifth (the G), needs to be 2 cents higher.
It should be noted that Hermode Tuning is dynamic, not static. It is continuously adjusted
in accordance with the musical content. This is done because, as an alternative to
tempered, or normal, tuning, fifth and third intervals can also be tuned to ideal frequency
ratios:the fifth to a ratio of 3:2, the major third to 5:4. Major triads then sound strong. With
clean (scaled) tuning, Hermode Tuning changes the frequencies to values that are partly
higher or partly lower.
Tuning settings in Logic Pro
Logic Pro includes a real-time tuning system, for use with the included software
instruments. You can configure the tuning system in the Tuning settings.
Software Instrument Pitch: Tune slider: Determines the global tuning of all software
instruments. The default is concert pitch A (440Hz). Detuning is in cent (1/100th of a
semitone) steps.
Software Instrument Scale: Equal Tempered: Disables any tuning, and uses an equal
tempered scale.
Software Instrument Scale: User: Allows you to detune each semitone in steps. Drag
vertically in each semitone box until you reach the value you want, or double-click in a
box and enter a value. Click the Reset button to reset all of your tuning adjustments to
their default values.
Software Instrument Scale: Hermode Tuning (HMT): Allows you to set different Hermode
Tuning (HMT) modes and degrees of effect. Select this when you wish to adjust the
purity of 3rd and 5th intervals between notes while retaining the pitch relationship
between keys and notes.