Audio interface device for public address systems

In a mixer electronic circuit having the ability to mix multiple audio inputs into one or more outputs, the combination of said mixer electronic circuit with a direct box circuit comprising:

• an audio input connection from an external source that provides a direct audio signal, said direct audio signal being provided to a first external output;
• and
• an internal mixer input that routes said direct audio signal internally to said mixer electronic circuit;
• an audio transformer that converts said direct audio signal from a high-impedance signal into a low-impedance audio signal provided to a second external output;
• and
• a switch allowing said direct audio signal to be connected and disconnected from said internal mixer input and from said audio transformer.

A method by which pre-existing transcripts can be mixed with additional audio content and re-recorded, the method comprising:

• providing a mixer-direct-box combination circuit;
• providing an original transcript audio signal, as read from a transcription device;
• feeding said transcript audio signal to an audio input connection of said mixer-direct-box combination circuit;
• switching said transcript audio signal between a preview mode and a feed-through mode;
• wherein said preview mode comprises feeding said transcript audio signal solely to a first external output for listening with a set of headphones or headset, and
• wherein said feed-through mode comprises feeding said transcript audio signal to an internal mixer input that routes said transcript audio signal internally to a mixer electronic circuit which is output to a sound card input on said transcription device or to a second transcription device, and said feed-through mode further comprises feeding said transcript audio signal to a room public address system.