Hi Kelly-

>hi Carl. One reference to this issue occurs in Richard Parncutt's
>important 1988 "Revision of Terhardt's Psychoacoustical Model of the
>Root(s) of a musical chord." On p. 70, he discusses Terhtards use of
>subharmonics for a chord root model, and on the 'mistuning' of the
>natural 7th harmonic, he writes that 'this does not effect the model,
>as mistunings by up to half a semitone may still be perceived as
>belonging to the tone [citations...]

There's nothing I can see here against harmonic entropy.

>...and variations in tuning may occur in performance of diatonic
>music [citations..] without effecting the musics perceived tonal
>structure.

"Tonal structure" sounds to me like it almost could be referring
to functional harmony, which is outside of the scope of harmonic
entropy or any model of psychoacoustic dissonance.

>I don't know the current status of this debate, but have often seen
>it stated in the psychacoust lit. that tonal fusion in a complex tone
>works within a range of 'mistuings'...

"Tonal fusion" is a loaded term, isn't it? One would have to
know what it means to comment.

-Carl