authentic(redirected from Authentical)
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1. (of a deed or other document) duly executed, any necessary legal formalities having been complied with
a. using period instruments and historically researched scores and playing techniques in an attempt to perform a piece as it would have been played at the time it was written
b. (in combination)
a. (of a mode as used in Gregorian chant) commencing on the final and ending an octave higher
b. (of a cadence) progressing from a dominant to a tonic chord