This is a sample program to capture audio from Capture device recognized by ALSA and send the audio data to the cloud side (Source).

■ Build and Installation

Follow the build instructions to obtain audio-source-alsa/ZaoAudioSourceAlsa. To replace the pre-built binary installed by the SDK setup, execute the command as follows. ```` $ sudo install -m 755 -o root -g root audio-source-alsa/ZaoAudioSourceAlsa /usr/local/bin

## ■ Command line options.

ZaoAudioSourceAlsa -d <device> [-s <stream_name>] [-p <link-path>] ```

-d <device> : specify ALSA device name.
- -d <device>: specifies a PCM device name enumerated by arecord -L etc. * Example: -d plugh -L : specifies a PCM device name.
  - Example: -d plughw:CARD=2.
- This option is required.
-s <stream_name> : specify stream name.
- -s <stream_name> : specify one stream name to connect.
  - embedded : send as embedded audio superimposed on the video signal.
  - external : send as additional external audio.
- external : send as additional external audio.
-p <link-path> : specify path for linkage.
- -p <link-path> : path for linking with ZaoRemoteEndpoint.
- If omitted, it is unix:///run/zao/RemoteEndpoint.sock.

■ Main operations

To stop fetching and sending, type Ctrl-C.

■ Limitations

The selected Capture device must support 48 kHz sampling rate and stereo input.