ĐIỆN tử VIỄN THÔNG DTVT2 nhom5 bai9 khotailieu

Unit 9: Audio recording systems Task What problems are there with records? Some of the problems associated with vinyl records are eliminated such as 'crackle' caused by dust and static, and 'jumping', due to scratches on the recording surface What these abbreviations mean? LP: long-playing CD: Compact Disc Task Use the text above to complete this table of differences between LPs and CDs: LPs CDs Recording system analogue digital Sound quality does not deteriorate with use Access poorer than the original serial Audio pattern groove pits Material vinyl perspex Playing mechanism mechanical Durability easily damaged durable Size 12 inches 12cm random Playing time 45 minutes 74 minutes Task Items in List can be causes or effects of items in List Match the pairs Compare your answers with your partner 1-b 2-e 3-f 4-c 5-a 6-d 7-g Task 6 Speaking practice Recording system Sound quality Access Medium Playing time Advantages DCC (Digital Compact Cassette – băng từ) MD (MiniDisc – đĩa mini) magnetic tape quality is the same laser and a magnetic field magneto-optical quality is the same laser and a magnetic field can play again can play again it can immediately jump to any part of the recording rather than having to play from the beginning to the end backwards compatibility