To:

sound cassette. sound disc. sound tape reel. sound track film. 1 sound cartridge. 3 compact discs. 2 sound cassettes. Use sound disc and sound cassette only for analog discs or cassettes. 1 sound disc (a 78 rpm shellac disc) but 1 compact disc (a 4 ¼ in. digital disc) Add reel, cassette, etc., as appropriate, to sound track film. 1 sound track ... ................
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