A finales de los sesenta, Marshall Chess decidió dar un nuevo sonido psicodélico al sello de su padre, de Chess Records, eligiendo una banda de apoyo (The Rotary Connection) para un disco con cada uno de sus máximos "frontman" en blues: Muddy Waters, y su "Electric Mud" de 1968, y Howlin' Wolf, para "The Howlin' Wolf Album", de 1969. Así, ha sonado:

1. Muddy Waters - I just want to make love to you

2. Muddy Waters - I'm your hoochie coochie man

3. Muddy Waters - Let's spend the night together

4. Muddy Waters - She's alright

5. Muddy Waters - Mannish boy

6. Muddy Waters - Herbert Harper's free pass news

7. Muddy Waters - Tom cat

8. Muddy Waters - The same thing

9. Howlin' Wolf - Spoonful

10. Howlin' Wolf - Tail dragger

11. Howlin' Wolf - Smokestack lightning

12. Howlin' Wolf - Moanin' at midnight

13. Howlin' Wolf - Built for comfort

14. The Electricmud Cats & Chuck D & Common - Mannish Boy

15. Howlin' Wolf - The red rooster

16. Howlin' Wolf - Evil

17. Howlin' Wolf - Down in the bottom

18. Howlin' Wolf - Three hundred pounds

19. Howlin' Wolf - Back door man