1. Fixed a bug that can cause over-pull premeasuring to skip ahead and get out of sync with what notes you are playing.
2. Due to recurring problems with the new "auto-all" mode in automatic note switching, the automatic note switching code from version 4.6.1 replaced the new code.

Fixed a bug so that prevented auto note switching from taking the offset into account.  In addition there are these changes from version 4.7:

* Adjustable update rate for the Spectrum Display - up to 10 updates per second.
* More reliable and sensitive Auto-All automatic note switching.
* Option to auto-note switch only on the attack portion of the sound rather than the sustain portion to reduce instances of switching to the wrong note.
* Phase Display speed is now a logarithmic function of the tuning error rather than linear. This gives more resolution very near to the tuning target plus more range when far from the tuning target.
* Faster and more precise Inharmonicity measurements (3 seconds max instead of 6 seconds max).
* Accuracy and speed of the Locking operation is improved.
* Removal of obsolete creation of "split-scale" tunings. Loading of previously saved "split-scale" tunings is still supported.
* Removal of obsolete manual adjustment of non 3-part tuning curves. Use 3-part tuning instead.

* Adjustable update rate for the Spectrum Display - up to 10 updates per second.
* More reliable and sensitive Auto-All automatic note switching.
* Option to auto-note switch only on the attack portion of the sound rather than the sustain portion to reduce instances of switching to the wrong note.
* Phase Display speed is now a logarithmic function of the tuning error rather than linear. This gives more resolution very near to the tuning target plus more range when far from the tuning target.
* Faster and more precise Inharmonicity measurements (3 seconds max instead of 6 seconds max).
* Accuracy and speed of the Locking operation is improved.
* Removal of obsolete creation of "split-scale" tunings. Loading of previously saved "split-scale" tunings is still supported.
* Removal of obsolete manual adjustment of non 3-part tuning curves. Use 3-part tuning instead.

In addition to support for system-wide Dark Mode, this update provides an option to override the system setting for Dark Mode within TuneLab.  The user may now choose to have Light Mode, Dark Mode, or to follow the device's light/dark setting.

* Responds to system selection of Dark Mode.
* Displays current tuning curve interval selection on the main tuning screen.
* The main tuning screen warns of a no-stretch tuning until some inharmonicity measurements are taken.

This update fixes two bugs:
1. If a new tuning is not saved and the app has to be closed for some reason, the new tuning is not restored when the app is started up again.  This is now fixed so that the new tuning is restored, even if it was not saved.
2. A phone call interruption during tuning causes an audio error message that requires exiting the app and opening it again.  This is also fixed so that the normal operation of the app resumes when the phone call is done.

* Better positioning of the search bar when finding a tuning file to load.
* Expanded the Deviation Curve interval selections to include all intervals that are available in 3-part tuning.
* Updated the Dropbox functions to use the new authorization function required by Dropbox by Sept. 30, 2021.
* Provided means to save the pre-measurements from a pitch-raise by e-mailing them to the address of your choice.
* Option to e-mail any tuning file or exam report to any address.

* A new tuning curve generation method called "3-part tuning" provides the means to specify the kind of interval that should be beatless at three separate places in the scale: bass, treble, and middle.
* "Auto-all" note switching mode will now switch automatically from any note to any other note.

New in version 4.3.1:  Fixed compatibility problem with iOS8

New in version 4.3:
1. More robust pitch-raise pre-measuring for low bass notes.
2. File search bar added to Load Tuning for finding tuning files faster in long lists of files by entering a few letters of the file name.
3. Fast one-touch access to over-pull (pitch-raise) settings from main tuning page.
4. Optional use of plate strut locations to improve pitch-raising accuracy.
5. Fixed two-fingered reset of offset in iOS 10.
6. Dropbox functions revised to accommodate changes at dropbox.com which will make the version 4.2 Dropbox functions cease to function starting in June, 2018.
7. Streamlined handling of saving tuning before starting a new tuning.

1. More robust pitch-raise pre-measuring for low bass notes.
2. File search bar added to Load Tuning for finding tuning files faster in long lists of files by entering a few letters of the file name.
3. Fast one-touch access to over-pull (pitch-raise) settings from main tuning page.
4. Optional use of plate strut locations to improve pitch-raising accuracy.
5. Fixed two-fingered reset of offset in iOS 10.
6. Dropbox functions revised to accommodate changes at dropbox.com which will make the version 4.2 Dropbox functions cease to function starting in June, 2018.
7. Streamlined handling of saving tuning before starting a new tuning.

1. Over-pull pre-measure displays results of each note as it is measured.
2. Added option to download all Dropbox tuning files to local files.
3. Phase Display turns yellow while offset adjustment is enabled.
4. Added option to display a smooth tuning curve graph for "all fundamentals".
5. Fixed initial Dropbox linkage bug on iPads.
6. Display warning when New Tuning would discard fresh inharmonicity readings.
7. Replace warning about changing partials with flashing partial display when partials change.
8. Load Tuning scrolls list display to include current tuning, if current tuning is in displayed folder.

1. iOS9 compatibility issue fixed.
2. iPad tuning screen uses all of the screen.
3. Over-pull pre-measure switches to next note before note is played.
4. Over-pull occasional inaccurate pre-measurement of first note fixed.

1. Optional cloud storage for tuning files using Dropbox.
2. Display of cents tuning error is extended to +/- 260 cents.
3. Optional calibration through Internet time servers.
4. Pinch-zoom of Spectrum Display from main screen.
5. Main screen gestures control all aspects of auto note switching.
6. Two-fingered tap on Phase Display resets offset.
7. Warning when gesture changes partials.
8. Optional user-entered comments embedded in tuning files.
9. Over-pull pre-measurements visible with one tap from main screen.
10. Over-pull break settings saved in tuning file.
11. Auto partial selection allowed up to G#4.
12. Automatic tuning curve adjustment mode entered automatically whenever inharmonicity is measured.

1. iPhone layout adapts to the larger iPhone 5 screen size.
2. Over-pull defines separate breaks for wound strings and the bass bridge.
3. Custom stretch is now visible in the tuning curve graph, facilitating manual adjustments to match aurally-tuned notes.
4. A warning is shown if a new tuning is selected when there are unsaved inharmonicity measurements.  Previously the warning was only shown if the tuning had a name.  Now it protects unnamed tunings as well.

Resuming after phone call interruptions in iOS 6 is more robust, avoiding "Audio System Error" hangups.
Ability to rename and/or move tuning files has been added.
Over-pull pre-measuring can be paused and reviewed from main tuning screen.
Average of pre-measurements is displayed in "Edit Pre-measurements".
Inharmonicity measuring is more sensitive and finds and uses more partials.

New inharmonicity model more accurately matches actual readings.
Split-scale mode for poorly-scaled spinets.
More flexible editing of Custom Offsets.
Clear any main offset when starting a new tuning.
Option for thicker traces on the Spectrum Display.
Quick one-touch gesture for turning auto note switching on and off from the main tuning page.

Improved power management when device is locked.
Fixed auto note switching when a large offset is selected.
Added option to lock orientation on iPhone and iPod Touch.
Improved display of inharmonicity results in landscape mode.
Added historical temperament normalization options.
Improved entry page for making a new temperament.
Fixed bug where pickers in over-pull settings were not showing current settings.
Added support for PTG Tuning Exam capture and scoring.

Fixed a bug in Spectrum Zoom select.  Added support for iPad.  Added ability to transfer Offset to Custom Offset for the current note.  Added Landscape support.  Enabled file sharing through iTunes (if you have iOS 3.2 or higher). Enabled background suspension (on phones that support multitasking).

Automatic note sequencing for measuring inharmonicity when starting a new tuning.  (See "Edit Measure Sequence" in Settings.)  Automatic tuning adjustment after inharmonicity measurements.  Option for displaying beats in the Deviation Curve. Detection of missing microphone in iPod Touch.  Detection of wrong note pre-measurements in over-pull.