| 摘要 |
An apparatus for inserting messages while a digital audio file is played including a subcarrier receiver with short-term memory (118) and a microcontroller with long-term memory (120) capable of recognizing a trigger code. The microcontroller (120) selectively outputs a message from the memory (118) in response to the trigger code recognized during the playing of a digital audio file. An advertising entity can distribute to targeted recipients the coded digital audio files or audio devices which may include indicia, such as a trademark or logo, indicating the entity. The device may be distributed for free or at a discounted charge with payments from third parties for broadcasting their messages offsetting the cost of the devices. |
