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treble recorder noun[ C ] UKuk /ˌtreb.əl rɪˈkɔː.dər/ us /ˌtreb.əl rɪˈkɔːr.dɚ/(USalto recorder) a recorder(= a wind instrument) with a slightly lower sound than the descant recorder高音竖笛 filipfoto/iStock/Getty Images Plus/GettyImages SMART Vocabulary: related words and phrases Musical instruments accordion acoustically aerophone alphorn alto drum kit drum machine drumbeat drumhead drumroll ocarina oud over-pedal panpipes paradiddle tuned tuning fork tuning peg ukulele unpitched |