Audio transmission device and operating system utilizing the same

An operating system comprising:

• an electronic device comprising:
• an audio processing application program;
• a native application program;
• and
• a media manager configured to provide a voice signal to the native application program;
• and
• an audio transmission device configured to couple to the electronic device and comprising:
• a first transmission interface configured to connect to the electronic device;
• a detection circuit detecting an external sound to generate an input voice;
• a vendor-defined class circuit generating a first voice signal according to the input voice, providing the first voice signal to the audio processing application program via the first transmission interface and receiving a processed voice via the first transmission interface, wherein the audio processing application program processes the first voice signal to generate the processed voice and provides the processed voice to the first transmission interface;
• and
• an audio class circuit receiving the processed voice provided by the vendor-defined class circuit, using the processed voice as a second voice signal and providing the second voice signal to the media manager via the first transmission interface,
• wherein:
• the vendor-defined class circuit comprises:
• a first interface providing the first voice signal to the first transmission interface and receiving the processed voice from the first transmission interface;
• and
• a second interface providing the processed voice to the audio class circuit,
• the first interface is directly connected to the first transmission interface, and the second interface does not connect to the first transmission interface.