"Development of 20th & 21st Century Technologies": HTML5 Crossword

Across

2. LP on a record stands for (4,6)
4. playback device with limited frequency range (10)
6. low pitched four string instrument (4,6)
7. early flat disc format (6)
9. Musical Instrument Digital Interface (4)
10. a device which allows audio capture / playback with a computer (5,9)
11. a transducer used on electric guitars (6)
12. a virtual version of a real instrument (7,10)
13. tape was held on a reel which passed through the recording/playback head and wound onto a second reel (4,2,4)
14. coin-operated public audio device, most popular between the 1940s and the 1960s (7)
17. analogue format - polyvinyl chloride plastic (5)
18. often used with distortion in Rock & Punk music (8,6)
19. early format for storing recorded information (3,8)
20. the first device to communicate to mass audiences (5)

Down

1. digitally recordable, highly portable, audio format (8)
3. mechanical device which read a roll of perforated paper (6,5)
5. software developed for performing which lets users record and edit without stopping playback (11,8)
8. original process for capturing recorded sound (8,4)
15. electronic version of a well-known keyboard instrument (8,5)
16. similar to the reel-to-reel tape recorder but more compact (8)