Dynamic information storage or retrieval – Combined independent audio systems – Changeover between audio systems
Patent
1990-01-23
1991-07-16
Levy, Stuart S.
Dynamic information storage or retrieval
Combined independent audio systems
Changeover between audio systems
369 4, H04B 120
Patent
active
050330365
ABSTRACT:
A reproducing apparatus mixes the voice information from a microphone and the information reproduced from a recording medium in which a vocal signal plus an instrumental signal is contained as a first signal in a first channel and only an instrumental signal is contained as a second signal in a second channel. A first mixing circuit mixes the first signal and the second signal. The output of the first mixing circuit is mixed by a second mixing circuit with the voice information from the microphone. A control circuit or audio detecting circuit provides a control signal in accordance with the level of the voice information from the microphone. The control signal controls a selection control circuit to gradually and smoothly vary the mixing ratio of the first signal and the second signal when mixing these two signals.
REFERENCES:
patent: 4306114 (1981-12-01), Callahan
patent: 4434325 (1984-02-01), Kobayashi et al.
Kawano Eisaku
Mawatari Takeshi
Ohmori Seiji
Ohtsubo Hiroshi
Tsuruga Tasuku
Levy Stuart S.
Nguyen Hoa
Pioneer Electronic Corporation
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