# 执行蓝牙 A2DP 发送功能 Source: [https://docs.qualcomm.com/doc/80-70017-13SC/topic/bluez-perform-bluetooth-a2dp-source-functions.html](https://docs.qualcomm.com/doc/80-70017-13SC/topic/bluez-perform-bluetooth-a2dp-source-functions.html) 用户可以使用 `bluetoothctl` 菜单、 `menu transport` 子菜单和 `paplay` 命令执行蓝牙 A2DP 发送功能。 开始之前，请设置设备并转至[设置设备的 A2DP 功能](https://docs.qualcomm.com/doc/80-70017-13SC/topic/bluez-a2dp.html#bluez-a2dp__section_fwp_mx5_mcc_navyanka_08-25-24-1121-38-413)中所述的所需菜单。 ## 连接远程设备 要以 A2DP 发送端角色连接远程设备，请从 `bluetoothctl` 菜单运行以下命令： connect Copy to clipboard **参数** `` 是远程设备的蓝牙地址。 **示例** 要使用 `` `17:1A:35:8D:A2:A4` 连接到已配对的远程设备，请运行以下命令： connect 17:1A:35:8D:A2:A4Copy to clipboard **示例输出** [bluetooth]# connect 17:1A:35:8D:A2:A4 Attempting to connect to 17:1A:35:8D:A2:A4 [CHG] Device 17:1A:35:8D:A2:A4 Connected: yes [CHG] Device 17:1A:35:8D:A2:A4 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb [CHG] Device 17:1A:35:8D:A2:A4 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb [CHG] Device 17:1A:35:8D:A2:A4 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb [CHG] Device 17:1A:35:8D:A2:A4 ServicesResolved: yes [CHG] Device 17:1A:35:8D:A2:A4 Bonded: yes [CHG] Device 17:1A:35:8D:A2:A4 Paired: yes [NEW] Endpoint /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1 [NEW] Endpoint /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep2 [NEW] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 Connection successful [CHG] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 State: active [CHG] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 Volume: 0x0040 (64) [CHG] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 State: idle [CHG] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 Volume: 0x0044 (68) [CHG] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 Volume: 0x0040 (64) [MySoundbar]#Copy to clipboard ## 列出可用的传输 要列出可用的传输，请从 `menu transport` 子菜单运行以下命令： listCopy to clipboard **示例输出** [MySoundbar]# list Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0Copy to clipboard ## 获取有关 codec 功能的信息 要获取有关传输 codec 功能的信息，请从 `menu transport` 子菜单运行以下命令： show Copy to clipboard **参数** `` 为传输路径。 **示例** 要获取有关 `` `/org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0` codec 功能的信息，请运行以下命令： show /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0Copy to clipboard **示例输出** [MySoundbar]# show /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 UUID: 0000110a-0000-1000-8000-00805f9b34fb Codec: 0x00 (0) Configuration: 0x21 (33) Configuration: 0x15 (21) Configuration: 0x02 (2) Configuration: 0x35 (53) Device: /org/bluez/hci0/dev_17_1A_35_8D_A2_A4 State: idle Volume: 0x0040 (64)Copy to clipboard ## 设置绝对音量 注释： 确保 DUT 和远程设备支持 `setabsvolume` 功能。 要设置传输的绝对音量，请从 `menu transport` 子菜单运行以下命令： volume [value]Copy to clipboard **参数** - `` 为传输路径。 - `[value]` 是音量大小。 **示例** 要将 `` `/org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0` 的绝对音量设置为 `50`，可运行以下命令： volume /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 50Copy to clipboard **示例输出** [MySoundbar]# volume /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 50 Changing Volume succeeded [CHG] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 Volume: 0x0032 (50) [MySoundbar]# volume /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd0 10 Changing Volume succeededCopy to clipboard ## 播放音频文件 注释： - DUT 不支持音频播放器。使用 `paplay` 命令播放音乐。 - 仅支持 PCM 音频样本。 要播放 DUT 中的歌曲，请执行以下操作： 1. 运行 SSH。 2. 通过运行以下命令播放 WAV 文件： paplay -vCopy to clipboard **参数** `` 是 WAV 文件的文件路径。 **示例** 要播放 /tmp/pcmtest.wav 处的 WAV 文件，请运行以下命令： paplay /tmp/pcmtest.wav -vCopy to clipboard **示例输出** sh-5.1# paplay /tmp/pcmtest.wav -v Opening a playback stream with sample specification 's16le 2ch 44100Hz' and channel map 'front-left,front-right'. Connection established. Strean successfully created. Buffer metrics: maxlength=4194304, tlength=352800, prebuf=349276, minreq=3528 Using sample spec 's16le 2ch 44100Hz', channel map 'front-left,front-right'. Connected to device bluez_sink.20_19_D8_36_90_40.a2dp_sink (index: 4, suspended: no). Stream started. Time: 4.427 sec; Latency: 2042656 usec.Copy to clipboard ## 获取接收端列表 要在连接多个设备时获取接收端列表，请在 SSH中运行以下命令： pactl list sinks shortCopy to clipboard **示例输出** sh-5.1# pactl list sinks short 0 low-latency0 module-pal-card.c s16le 2ch 48000Hz SUSPENDED 1 deep-buffer0 module-pal-card.c s16le 2ch 48000Hz SUSPENDED 2 offload0 module-pal-card.c s16le 2ch 48000Hz SUSPENDED 3 voip-rx0 module-pal-card.c s16le 2ch 48000Hz SUSPENDED 4 bluez_sink.20_19_D8_36_90_40.a2dp_sink module-bluez5-device.c s16le 2ch 44100Hz SUSPENDEDCopy to clipboard ## 在特定接收端上播放音频 要在连接多个设备时在特定接收端上播放音频，请在 SSH中运行以下命令： paplay --device= -vCopy to clipboard **参数** - `` 是 WAV 文件的文件路径。 - `` 是接收端名称。 **示例** 要在 `bluez_sink.20_19_D8_36_90_40.a2dp_sink` 接收端上播放 pcmtest.wav，请运行以下命令： paplay pcmtest.wav --device=bluez_sink.20_19_D8_36_90_40.a2dp_sink -vCopy to clipboard **示例输出** sh-5.1# paplay pcmtest.wav --device=bluez_sink.20_19_D8_36_90_40.a2dp_sink -v Opening a playback stream with sample specification 's16le 2ch 44100Hz' and channel map 'front-left,front-right'. Connection established. Stream successfully created. Buffer metrics: maxlength=4194304, tlength=352800, prebuf=349276, minreq=3528 Using sample spec 's16le 2ch 44100Hz', channel map 'front-left,front-right'. Connected to device bluez_sink.20_19_D8_36_90_40.a2dp_sink (index: 4, suspended: no). Stream started. Time: 2.925 sec; Latency: 2062081 usec.Copy to clipboard ## 断开对端设备的连接 要断开远程设备的连接，请从 `bluetoothctl` 菜单运行以下命令： disconnect Copy to clipboard **参数** `` 是远程设备的蓝牙地址。 **示例** 要断开与 `` `17:1A:35:8D:A2:A4` 配对的远程设备，请运行以下命令： disconnect 17:1A:35:8D:A2:A4Copy to clipboard **示例输出** [MySoundbar]# disconnect 17:1A:35:8D:A2:A4 Attempting to disconnect from 17:1A:35:8D:A2:A4 [DEL] Transport /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1/fd2 [DEL] Endpoint /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep1 [DEL] Endpoint /org/bluez/hci0/dev_17_1A_35_8D_A2_A4/sep2 [CHG] Device 17:1A:35:8D:A2:A4 ServicesResolved: no Successful disconnected [CHG] Device 17:1A:35:8D:A2:A4 Connected: noCopy to clipboard **上一级主题：** [高级音频分发配置文件](https://docs.qualcomm.com/doc/80-70017-13SC/topic/bluez-a2dp.html) Last Published: Jan 23, 2025 [Previous Topic 高级音频分发配置文件](https://docs.qualcomm.com/bundle/publicresource/80-70017-13SC/topics/bluez-a2dp.md) [Next Topic 执行蓝牙 A2DP 接收端功能](https://docs.qualcomm.com/bundle/publicresource/80-70017-13SC/topics/bluez-perform-bluetooth-a2dp-sink-functions.md)