+are found in @file{ly/string-tuning-init.ly}.
+
+@funindex contextStringTunings
+@funindex \contextStringTunings
+@cindex tablature, custom string tunings
+@cindex custom string tunings
+
+Any desired string tuning can be created. The
+@code{\contextStringTuning} function can be
+used to define a string tuning and set it as the
+@code{stringTunings} for the current context.
+@code{\contextStringTuning} takes two arguments: the
+symbol in which the string tuning, and a chord construct
+that defines the pitches of each string in the tuning.
+The chord construct must be in absolute octave mode,
+see @ref{Absolute octave entry}. The string
+with the highest number (generally the lowest string) must
+come first in the chord. For example, we can
+define a string tuning for a four-string instrument with pitches
+of @code{a''}, @code{d''}, @code{g'}, and @code{c'}:
+
+@lilypond[quote,verbatim]