Audio teaching system for use in choral instruction
OwnerFrank W. Garlockinventor
Life of this patent
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Abstract
An audio teaching system for use in choral instruction is illustrated having a four-track cassette recorder/player interconnected with a four-channel amplifier leading to a set of earphone amplifier control boxes, each having a single earphone attached thereto. The system provides for said cassette player to be used in conjunction with specially prepared tapes having the four harmonic parts of the music selection recorded on separate channels. Each of said control boxes has its own volume control, amplifier, single earphone, and also contains a selector switch which allows the choir member to choose to monitor one or all of the harmonic parts.
Claims3
For use in choral instruction, an audio teaching system comprising:
- a recorder/player having at least four channels;
- a low noise, amplifier for said four channels;
- a mixer and equalizer for said four channels having the capability to record or play said four channels simultaneously with said channels being in the same direction and syncronized;
- a plurality of earphone amplifier control boxes connected in series;
- each of said control boxes having
- a selector switch for choosing any of the said four channels or a mix-down of all four channels;
- an isolation operational amplifier which provides additional gain to drive said earphones while isolating said earphones from the main amplifier;
- a volume control for said isolation operational amplifier permitting the listener autonomy over the level of the chosen signal;
- a single earphone;
- and
- an earphone connection to accommodate said earphone.
Dependencies are inferred from the claim text.