Bauckham's interpretation of "living and surviving voice" in Papias — literal, not metaphorical

Bauckham (Jesus and the Eyewitnesses, p. 27) argues that when Papias speaks of a "living and surviving voice" he is not speaking metaphorically about oral tradition as many scholars suppose (including Ehrman), but quite literally of an informant — someone who has personal memories of the words and deeds of Jesus and who is still alive. Papias wants to lock this testimony into writing before these witnesses die.