| 摘要 |
An audio interface device may include an audio adapter circuit having some properties and capabilities similar to those of a standard direct-box, but preferably with additional features such as adaptation to allow high-impedance stereo headphones to be connected and a switch that turns the signal to the exterior sound system on/off without interrupting sound to the headphones. The device may be housed in a rugged chassis and may include a locking cover and/or mounting structure. Optionally, the device may be incorporated into audio mixing equipment. A preferred mixer-direct-box embodiment may mix multiple audio inputs into one or more outputs, and may comprise an audio input connection from an external source that provides a direct audio signal being provided to a first external output, an internal mixer input that routes said direct audio signal internally to the mixer electronic circuit portion of the device, an audio transformer that converts the direct audio signal from a high-impedance signal into a low-impedance audio signal provided to a second external output, and a switch allowing the direct audio signal to be connected and disconnected from the internal mixer input and from the audio transformer. |
