In a tin shed in the backstreets of Kinshasa, Democratic Republic of Congo's capital, a barefoot 61-year old Jean-Luther Misoko Nzalayala, aka Socklo, hacks with a machete at a lump of wood that is starting to resemble the neck of a guitar.
Later, he hammers bits of the white plastic chair into it as inlay to help guide players around the fretboard and fixes threads of motorbike brake cable as strings.
"First it was a chair that you were happy to sit on. After it dried, I gave it a second life, and it will be resurrected," he said, surrounded by a jumble of broken and half-built guitars, and a fading picture of Congo's late dictator Mobutu Sese Seko.
For over 40 years the self-taught luthier has used a variety of recycled materials and local hardwoods to create guitars that sing with the raw intensity of one of Africa's musical meccas.
Socklo's passion began in his village in Kikwit, southwestern Congo, in 1975, when he dismantled and copied a guitar a friend had given him.
"I didn't measure anything... and when I played it, it began to collapse," he said. "I was really disappointed by the result, but I kept trying."
Three years later, he moved to Kinshasa, where he sold his first guitar to his cousin. "I couldn't imagine that people in a city like Kinshasa could like a guitar like this. It gave me courage."
He used negative feedback to improve his craft and finesse his designs. Soon there were fewer complaints, and local and international musicians were flocking to his tin shed.
Congolese music star Jupiter Bokondji loved Socklo's sound and asked him to go electric. The result, Jupiter said, is far more authentic than top guitar brands, which cost upwards of 20 times more.
"I have played it all over the world; everyone is amazed. To see that guitar doing what it does, the way it plays, it's like a tornado," Jupiter said.
Yarol Poupaud, a French guitarist who toured with rock-and-roll singer Johnny Hallyday for years, has bought four of Socklo's creations.
"It has little imperfections; it's not perfect, but that really makes the magic," Poupaud said, strumming on a blue starburst guitar emblazoned with Congo's flag.