DcAN Audio Interface
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Audio is passed between nodes of the DisComm Audio Network using the DcAN Audio Interface. Audio packets are sent through a predefined UDP/IP port. The following rules apply:
- The default IP port number for audio interface packets is 33000
- All elements of each packet shall be in network byte order
The following sections define the packets that are valid for the DcAN Audio Interface
0x100 Audio Packet
- Each element of the 0x100 Audio Packet is a 16 bit signed integer
- The first 16 bit word of the packet represents the unique identifier and must be equal to 0x100
| Byte Offset | Element | Notes |
|---|---|---|
| 0 | 0x100 | |
| 2 | Source Device ID | Unique value, greater than zero, that identifies the sender of the packet |
| 4 | Communications Channel | An arbitrary value that represents a communications path between nodes on the DisComm Audio Network |
| 6 | Sequence Number | Value shall be incremented upon each transmit of an audio data packet |
| 12 | Audio Samples | Array of audio samples in 16-bit PCM format sampled at 8000 samples per second |
