on ♪ let the waves sweep along ♪ i got them deep river blues ♪ ♪ ♪ ♪ ♪ brown: and with me now is katy daleyprogram on "bluegrass country"-- a music broadcast on wamu radio here in the washington d.c. area. katie, we were watching those performances and you see the famous picking. tell us about the picking styles he was fames for. >> first, finger picking but also for flat picking, and i'm so glad you included that clip with earl, because doc did for the guitar what earl did for the dampo. they took those instruments out of rhythm section and mad them lead instruments. before that the guitar had been a rhythm instrument-- >> brown: sort of a backup. >> yes and he started the template for bluegrass, old time and folk music as a lead instrument. >> brown: this is the music he grew up with. it's mountain music. >> sure. >> brown: he brought it out to a wider audience. >> he was discovered by ralpherenceler of the smithsonian hohelped big mob row restart his career, and ralph told him unplug that guitar, throw that electric guitar away-- >> brown: which he was playing for a while. >> he was play