The first is hypnagogic hallucination, the second coloured audition.
On the contrary, hypnagogic illusion is, with me, a decided phenomenon.
And there are crystal-seers who are not subject to hypnagogic illusions.
These ‘hypnagogic illusions’ Pontus de Tyard described in a pretty sonnet, more than three hundred years ago.
For bad visualisers, on the other hand, the vividness ...