All one needs to do is look at the song titles to know how important Dan Penn's contribution to 'soul' music is, but his voice is great, too. I remember an Alex Chilton,(BoxTops' singer), interview where he mentioned his producer showing him how to sing 'The Letter', and that all he did was imitate it,(and not as well, according to Chilton himself). That producer was Penn...After listening to 'Do Right Man', I'm positive that Eric Clapton must have heard some old Dan Penn Demos when forming his own vocal style. I'm not a fan of 'singer-songwriter' recordings in general, but that's not an issue here; this is flat-out a great cd.