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12.2. Audio Formats

12.2.1. AU File Format

Audio (AU) files have a header and a content section. The header contains fields that describe the encoding format, as well as comments, titles, or any other text annotations, as listed in Table 12.7. The content section contains the audio data encoded according to the encoding specified and interpreted according to Table 12.7.

12.2.2. Musical Instrument Digital Interface (MIDI)

The MIDI is a standard interface enabling the interpretability of synthesizers, sequencers, home computers, and rhythm machines [MIDI]. Each MIDI-equipped instrument usually contains a receiver and a transmitter. Some instruments may contain only a receiver or transmitter. The receiver receives messages in MIDI format and executes MIDI commands. It consists of an optoisolator, Universal Asynchronous Receiver/Transmitter (UART), and other hardware needed to perform the intended functions. The transmitter originates messages in MIDI format and transmits them by way of a UART and line driver.


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