NHÓM – LỚP Đ8-ĐTVT2 MEMBER: - Phạm Văn Thành Phạm Thị Bích Lụa Vũ Thị Ngát Nguyễn Thị Minh Thu Dương Thị Hồng Hoàng Thị Hường Unit Audio recording systems Task : The problems are crackle caused by dust and static , jumping , due to scratches on the recording surface The other recording systems are : - The recorded digital system loudspeakers - Radio , loudspeakers - LP : Long-Playing - CD: Compact Disc Task : Task : LPs CDs Recording system analogue digital Sound quality poorer than the original Near peerfect reproduction Access serial random Audio pattern groove pits Material Playing mechanism vinyl mechanical perspex Laser Durability easily damaged durable Size 12 inches 12cm Playing time 45 minutes 74 minutes Task : 7 List distortion noise generated within components overheating a transistor dirty heads a build-up of oxide on the head jumping unwanted signals a b List interference on radios too high a recording level c d e the tape rubbing against the head scratches on records hiss f g damage poor recordings B E F C G D A Task : Task : DCC Recording system magnetic tape Sound quality quality is the same Access laser and a magnetic field Medium Playing time can play again Advantages MD magneto-optical quality is the same laser and a magnetic field can play again it can immediately jump backwards compatibility Task : to any part of the recording rather than having to play from the beginning to the end