Most character voices for an audio book - individual
Who
Roy Dotrice
What
224 total number
Where
United States (Los Angeles)
When

The greatest number of characters voiced in an audio book is 224, achieved by Roy Dotrice (UK), who performed distinct and distinguishable voices for every role in the 28-disc unabridged version of George R.R. Martin's A Game of Thrones, released on 13 January 2004. A Game of Thrones is the first book in George R.R. Martin's 'Song of Fire and Ice' series of fantasy novels.

The full audio book comprises 28 x 72 min discs. It would take almost a day and a half to listen to the entire work: 33 hours 36 minutes.