| Level | Piece |
| Ref No | XZA/845/2 |
| Title | From Megaphone to Microphone \ 5 \ Sound Machine, The |
| Date | 19 October 1999 |
| Extent | 1 radio programme |
| Description | Off-air recording: BBC Radio 4, 11:30, 34 mins. Russell Davies looks at the impact recorded sound had on the performance industry. |
| Language | English |
| Physical Description | 34 mins total. Side B of audio cassette XZA/845. |
| Format | Audio |