I loved the one with Jimi Hendrix and all of them Dick did with Janis. Specially the one, where he asks her to LIGHT HER FIRE and she says yes, my favorite singer.
He had the licks and the voice....no special effects necessary.
I always thought there had to be some electronic enhancement with the voice, but Donovan pulls it off even without a mic....acoustically.
"After silence, that which comes nearest to expressing the inexpressible is music".