> Now, sound seems to be "disabled" for Unix by having all primitives in
> sqUnixSound.c fail.

I thought they all "silently succeed" instead.  E.g:

    #define FAIL(X) { return X; }
    int snd_AvailableSpace(void) FAIL(8192)

Maybe there's something in the imagfe that's repeatedly calling the sound
primitives because they appear to be succeeding instantly?  I'll take a
closer look sometime.

(I guess this problem never surfaced before because the "page turning"
sound in the BookMorph is a new feature.)

> Is this problem related to the recently-fixed problem of
> improperly-handled primitive failures?

No.  That fix (and the problem is cures) only relates to user-defined
primitives.

Ian