Conversation so far:
Did the group Van der Graaf Generator influence many people?
Van der Graaf Generator have inspired several notable musicians, including Rush, John Lydon, Marc Almond, Graham Coxon, Luca Prodan, Mark E. Smith, John Frusciante, Bruce Dickinson and Julian Cope.
When was the group Van der Graaf Generator popular?
Van der Graaf Generator have generally been commercially unsuccessful outside of early 1970s Italy.
What type of music did the band Van der Graaf Generator perform?
Progressive rock, experimental rock, art rock
Did the band Van der Graaf Generator ever release any more music?
A new album, Do Not Disturb was released in September 2016.
Is there anything else interesting about the band Van der Graaf Generator besides their most recent album?
Although generally categorised as a progressive rock group, Cope is keen to distance Van der Graaf Generator from that movement, stating Their music was like some Brechtian bar band.

Question: In what other ways did they influence the sound of music?
Self-contained rewrite: In what other ways did the band Van der Graaf Generator influence the sound of music?