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Part 3: Post Scan
– General corrections
After performing the scan, Tune constructs the detected pitch curve and correction curve.
From this point on, any audio you play on this track will be affected by the correction
curve pitch adjustment, with all changes happening in real time. Remember, to modify
the curves you must select something – whether an individual note or a wider selection.
Changes will not affect unselected areas.
Since the correction curve is constructed by a set of defaults, now is the time to set your
own general correction parameters. If you locate a small section of a track whose
problems are representative of the entire scanned passage, you can experiment with the
small section and then apply those parameters to the entire passage.
Segmentation Tolerance and Scale Settings
Increasing Tolerance will generally make smoother segmentation where short note
glitches and slight marginal detunes will stick to the longer and more solid note in that
area. Some find it convenient to use the Select All button to select all notes in the scanned
passage and then manipulate the Tolerance parameter to see how it affects the note
segmentation of the correction curve.
Vibrato segments have a tendency to create over-segmentation, in which one vibrato
note may be segmented into two or three different note segments. The Tolerance
parameter can reduce this over-segmentation, but it may result in an over-tolerant setting
for other parts of the performance.
Tune offers a Vibrato segmentation control which will detect natural vibrato segments,
then target the note closest to the average pitch of the vibrato segment while maintaining
the natural vibrato. Vibrato detection is not perfect for all applications, so it is
recommended to reserve the vibrato segmentation for those specific selections where
your intuition tells you it should apply.
Oftentimes you will begin a project without knowing the scale or other general trends of
the music. It’s often easier to identify the scale after the first scan creates a suggested
segmentation. Now, too, you can more easily spot a general bias in the singer’s
performance, such as a tendency to be flat or sharp on a certain note, and make global
corrections. You can additionally “second guess” the notes grid and force the correction to
the legal note above or below or even experiment with scales to see if you achieve better
results.
General Correction Parameters settings
When you are satisfied with the segmentation, you can begin to adjust the general
correction parameters. The three controls, located below the graphic tools, default to the
settings embedded in the initial correction curve. Here’s how to adjust these settings for a
more personalized general correction:
Speed: Determines the speed of the correction within a note. Lower values will flatten
the pitch contours into a straight line, forcing the note’s pitch to the target note pitch.
Higher values will make a more relaxed correction, preserving more of the original pitch
contours while still correcting towards the target note.
Note Transition: This control sets how quickly or steeply a note “slides” into the next
note. Very low values tend to make a note jump to the next note in an unnatural way.