pulseaudio基于a2dp音频架构，其使用流程如下：
首先需要一直bluez5及pulseaudio，此处关于一直pulseaudio详见其他博客。
配置使用流程：
1.开启蓝牙设备 //此处与后续的bluetoothctl命令中的power on相对应,没有开启的话,bluetoothctl会报错. root@imx6qsabresd:~#rfkill unblock bluetooth 2.启动蓝牙 root@imx6qsabresd:~#hciconfig hci0 up 3.通过bluetoothctl连接蓝牙耳机 //必须先启动bluetoothd，否则bluetoothctl无法工作 root@imx6qsabresd:~#bluetoothd& root@imx6qsabresd:~#bluetoothctl [bluetooth]# power on Changing power on succeeded [bluetooth]# agent on Agent registered [bluetooth]# default-agent Default agent request successful [bluetooth]# scan on Discovery started [CHG] Controller A4:17:31:C7:9B:B6 Discovering: yes [NEW] Device 74:7D:04:2F:F1:BA 74-7D-04-2F-F1-BA [NEW] Device 88:0F:10:87:22:CE 88-0F-10-87-22-CE [CHG] Device 88:0F:10:87:22:CE Name: MI_SCALE [CHG] Device 88:0F:10:87:22:CE Alias: MI_SCALE [NEW] Device 35:BD:7B:5D:CC:AE 35-BD-7B-5D-CC-AE [NEW] Device 38:BC:1A:B2:9B:5D 38-BC-1A-B2-9B-5D [CHG] Device 35:BD:7B:5D:CC:AE LegacyPairing: no [CHG] Device 35:BD:7B:5D:CC:AE Name: J2-USB Bluetooth [CHG] Device 35:BD:7B:5D:CC:AE Alias: J2-USB Bluetooth [CHG] Device 38:BC:1A:B2:9B:5D Name: MEIZU MX4 [CHG] Device 38:BC:1A:B2:9B:5D Alias: MEIZU MX4 [NEW] Device 00:1A:7D:DA:71:13 00-1A-7D-DA-71-13 [CHG] Device 00:1A:7D:DA:71:13 RSSI: -76 [CHG] Device 00:1A:7D:DA:71:13 Name: JavieWong-PC [CHG] Device 00:1A:7D:DA:71:13 Alias: JavieWong-PC [CHG] Device 35:BD:7B:5D:CC:AE LegacyPairing: yes [CHG] Device 35:BD:7B:5D:CC:AE RSSI: -48 [CHG] Device 38:BC:1A:B2:9B:5D UUIDs: 00001112-0000-1000-8000-00805f9b34fb 00001203-0000-1000-8000-00805f9b34fb 0000111f-0000-1000-8000-00805f9b34fb 00001116-0000-1000-8000-00805f9b34fb 00001115-0000-1000-8000-00805f9b34fb 0000110c-0000-1000-8000-00805f9b34fb 0000110f-0000-1000-8000-00805f9b34fb 0000110a-0000-1000-8000-00805f9b34fb [CHG] Device 88:0F:10:87:22:CE RSSI: -92 [bluetooth]# pair 35:BD:7B:5D:CC:AE Attempting to pair with 35:BD:7B:5D:CC:AE [CHG] Device 35:BD:7B:5D:CC:AE Connected: yes [CHG] Device 35:BD:7B:5D:CC:AE UUIDs: 0000110b-0000-1000-8000-00805f9b34fb 0000110e-0000-1000-8000-00805f9b34fb 0000111e-0000-1000-8000-00805f9b34fb [CHG] Device 35:BD:7B:5D:CC:AE Paired: yes Pairing successful [bluetooth]# connect 35:BD:7B:5D:CC:AE Attempting to connect to 35:BD:7B:5D:CC:AE [CHG] Device 35:BD:7B:5D:CC:AE Connected: yes [bluetooth]# info 35:BD:7B:5D:CC:AE Device 35:BD:7B:5D:CC:AE Name: J2-USB Bluetooth Alias: J2-USB Bluetooth Class: 0x240404 Icon: audio-card Paired: yes Trusted: no Blocked: no Connected: yes LegacyPairing: yes UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb) UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb) [bluetooth]# imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 4.在另外一个控制终端中启动pulseaudio // root@imx6qsabresd:~# pulseaudio --system W: [pulseaudio] main.c: Running in system mode, but --disallow-exit not set! W: [pulseaudio] main.c: Running in system mode, but --disallow-module-loading not set! N: [pulseaudio] main.c: Running in system mode, forcibly disabling SHM mode! W: [pulseaudio] main.c: OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that. W: [pulseaudio] main.c: If you do it nonetheless then it's your own fault if things don't work as expected. W: [pulseaudio] main.c: Please read http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ for an explanation why system mode is usually a bad idea. E: [pulseaudio] module-alsa-card.c: Failed to find a working profile. E: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="0" name="platform-sound-hdmi.21" card_name="alsa_card.platform-sound-hdmi.21" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed. W: [pulseaudio] authkey.c: Failed to open cookie file '/var/run/pulse/.config/pulse/cookie': No such file or directory W: [pulseaudio] authkey.c: Failed to load authentication key '/var/run/pulse/.config/pulse/cookie': No such file or directory W: [pulseaudio] authkey.c: Failed to open cookie file '/var/run/pulse/.pulse-cookie': No such file or directory W: [pulseaudio] authkey.c: Failed to load authentication key '/var/run/pulse/.pulse-cookie': No such file or directory 5、配置默认音频输出设备 root@imx6qsabresd:~#pacmd help Available commands: help Show this help list-modules List loaded modules list-cards List cards list-sinks List loaded sinks list-sources List loaded sources list-clients List loaded clients list-sink-inputs List sink inputs list-source-outputs List source outputs stat Show memory block statistics info Show comprehensive status load-module Load a module (args: name, arguments) unload-module Unload a module (args: index|name) describe-module Describe a module (arg: name) set-sink-volume Set the volume of a sink (args: index|name, volume) set-source-volume Set the volume of a source (args: index|name, volume) set-sink-mute Set the mute switch of a sink (args: index|name, bool) set-source-mute Set the mute switch of a source (args: index|name, bool) set-sink-input-volume Set the volume of a sink input (args: index, volume) set-source-output-volume Set the volume of a source output (args: index, volume) set-sink-input-mute Set the mute switch of a sink input (args: index, bool) set-source-output-mute Set the mute switch of a source output (args: index, bool) set-default-sink Set the default sink (args: index|name) set-default-source Set the default source (args: index|name) set-card-profile Change the profile of a card (args: index|name, profile-name) set-sink-port Change the port of a sink (args: index|name, port-name) set-source-port Change the port of a source (args: index|name, port-name) set-port-latency-offset Change the latency of a port (args: card-index|card-name, port-name, latency-offset) suspend-sink Suspend sink (args: index|name, bool) suspend-source Suspend source (args: index|name, bool) suspend Suspend all sinks and all sources (args: bool) move-sink-input Move sink input to another sink (args: index, sink) move-source-output Move source output to another source (args: index, source) update-sink-proplist Update the properties of a sink (args: index|name, properties) update-source-proplist Update the properties of a source (args: index|name, properties) update-sink-input-proplist Update the properties of a sink input (args: index, properties) update-source-output-proplist Update the properties of a source output (args: index, properties) list-samples List all entries in the sample cache play-sample Play a sample from the sample cache (args: name, sink|index) remove-sample Remove a sample from the sample cache (args: name) load-sample Load a sound file into the sample cache (args: name, filename) load-sample-lazy Lazily load a sound file into the sample cache (args: name, filename) load-sample-dir-lazy Lazily load all files in a directory into the sample cache (args: pathname) kill-client Kill a client (args: index) kill-sink-input Kill a sink input (args: index) kill-source-output Kill a source output (args: index) set-log-target Change the log target (args: null|auto|syslog|stderr|file:PATH|newfile:PATH) set-log-level Change the log level (args: numeric level) set-log-meta Show source code location in log messages (args: bool) set-log-time Show timestamps in log messages (args: bool) set-log-backtrace Show backtrace in log messages (args: frames) play-file Play a sound file (args: filename, sink|index) dump Dump daemon configuration dump-volumes Debug: Show the state of all volumes shared Debug: Show shared properties exit Terminate the daemon root@imx6qsabresd:~#pactl list cards Card #0 Name: alsa_card.platform-sound.20 Driver: module-alsa-card.c Owner Module: 7 Properties: alsa.card = "0" alsa.card_name = "wm8962-audio" alsa.long_card_name = "wm8962-audio" device.bus_path = "platform-sound.20" sysfs.path = "/devices/soc0/sound.20/sound/card0" device.string = "0" device.description = "wm8962-audio" module-udev-detect.discovered = "1" device.icon_name = "audio-card" Profiles: input:analog-mono: Analog Mono Input (sinks: 0, sources: 1, priority: 2, available: yes) input:analog-stereo: Analog Stereo Input (sinks: 0, sources: 1, priority: 60, available: yes) output:analog-mono: Analog Mono Output (sinks: 1, sources: 0, priority: 200, available: yes) output:analog-mono+input:analog-mono: Analog Mono Duplex (sinks: 1, sources: 1, priority: 202, available: yes) output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority: 6000, available: yes) output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (sinks: 1, sources: 1, priority: 6060, available: yes) off: Off (sinks: 0, sources: 0, priority: 0, available: yes) Active Profile: output:analog-stereo+input:analog-stereo Ports: analog-input: Analog Input (priority: 10000, latency offset: 0 usec) Part of profile(s): input:analog-mono, input:analog-stereo, output:analog-mono+input:analog-mono, output:analog-stereo+input:analog-stereo analog-output-speaker: Speakers (priority: 10000, latency offset: 0 usec, not available) Properties: device.icon_name = "audio-speakers" Part of profile(s): output:analog-mono, output:analog-mono+input:analog-mono, output:analog-stereo, output:analog-stereo+input:analog-stereo analog-output-headphones: Headphones (priority: 9000, latency offset: 0 usec, available) Properties: device.icon_name = "audio-headphones" Part of profile(s): output:analog-mono, output:analog-mono+input:analog-mono, output:analog-stereo, output:analog-stereo+input:analog-stereo 如果发现板子上有单个声卡设备，则按照步骤5.1配置既可以，如果有多个声卡设备按照5.2步骤配置 5.1 单声音配置 Card #1 Name: bluez_card.35_BD_7B_5D_CC_AE Driver: module-bluez5-device.c Owner Module: 24 Properties: device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" Profiles: a2dp_sink: High Fidelity Playback (A2DP Sink) (sinks: 1, sources: 0, priority: 10, available: yes) headset_head_unit: Headset Head Unit (HSP/HFP) (sinks: 1, sources: 1, priority: 20, available: no) off: Off (sinks: 0, sources: 0, priority: 0, available: yes) Active Profile: a2dp_sink Ports: headset-output: Headset (priority: 0, latency offset: 0 usec) Part of profile(s): a2dp_sink, headset_head_unit headset-input: Headset (priority: 0, latency offset: 0 usec, not available) Part of profile(s): headset_head_unit root@imx6qsabresd:~#pacmd list-sinks 1 sink(s) available. * index: 1 name: driver: flags: HARDWARE DECIBEL_VOLUME LATENCY state: SUSPENDED suspend cause: IDLE priority: 9030 volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 base volume: 65536 / 100% / 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max request: 2 KiB max rewind: 0 KiB monitor source: 1 sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 fixed latency: 39.51 ms card: 0 module: 24 properties: bluetooth.protocol = "a2dp_sink" device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" ports: headset-output: Headset (priority 0, latency offset 0 usec, available: unknown) properties: active port: root@imx6qsabresd:~#pacmd list-cards 1 card(s) available. index: 0 name: driver: owner module: 24 properties: device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" profiles: a2dp_sink: High Fidelity Playback (A2DP Sink) (priority 10, available: unknown) headset_head_unit: Headset Head Unit (HSP/HFP) (priority 20, available: no) off: Off (priority 0, available: yes) active profile: sinks: bluez_sink.35_BD_7B_5D_CC_AE/#1: J2-USB Bluetooth sources: bluez_sink.35_BD_7B_5D_CC_AE.monitor/#1: Monitor of J2-USB Bluetooth ports: headset-output: Headset (priority 0, latency offset 0 usec, available: unknown) properties: headset-input: Headset (priority 0, latency offset 0 usec, available: no) properties: root@imx6qsabresd:~#pacmd set-default-sink 1 root@imx6qsabresd:~#pacmd set-card-profile 0 a2dp_sink root@imx6qsabresd:~#pacmd info Memory blocks currently allocated: 1, size: 64.0 KiB. Memory blocks allocated during the whole lifetime: 53616, size: 67.8 MiB. Memory blocks imported from other processes: 0, size: 0 B. Memory blocks exported to other processes: 0, size: 0 B. Total sample cache size: 0 B. Default sample spec: s16le 2ch 44100Hz Default channel map: front-left,front-right Default sink name: bluez_sink.35_BD_7B_5D_CC_AE Default source name: bluez_sink.35_BD_7B_5D_CC_AE.monitor Memory blocks of type POOL: 1 allocated/39706 accumulated. Memory blocks of type POOL_EXTERNAL: 0 allocated/0 accumulated. Memory blocks of type APPENDED: 0 allocated/0 accumulated. Memory blocks of type USER: 0 allocated/0 accumulated. Memory blocks of type FIXED: 0 allocated/0 accumulated. Memory blocks of type IMPORTED: 0 allocated/13910 accumulated. 24 module(s) loaded. index: 0 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore the volume/mute state of devices" module.version = "6.0" index: 1 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore the volume/mute/device state of streams" module.version = "6.0" index: 2 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore profile of cards" module.version = "6.0" index: 3 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Augment the property sets of streams with additional static information" module.version = "6.0" index: 4 name: argument: <> used: -1 load once: no properties: index: 5 name: argument: used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Detect available audio hardware and load matching drivers" module.version = "6.0" index: 7 name: argument: <> used: -1 load once: yes properties: module.author = "Fr茅d茅ric Dalleau" module.description = "When a bluetooth sink or source is added, load module-loopback" module.version = "6.0" index: 8 name: argument: <> used: -1 load once: yes properties: module.author = "Jo茫o Paulo Rechi Vita" module.description = "Detect available Bluetooth daemon and load the corresponding discovery module" module.version = "6.0" index: 9 name: argument: <> used: -1 load once: yes properties: module.author = "Jo茫o Paulo Rechi Vita" module.description = "Detect available BlueZ 5 Bluetooth audio devices and load BlueZ 5 Bluetooth audio drivers" module.version = "6.0" index: 10 name: argument: <> used: -1 load once: no properties: module.author = "Lennart Poettering" module.description = "Native protocol (UNIX sockets)" module.version = "6.0" index: 11 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore the default sink and source" module.version = "6.0" index: 12 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "When a sink/source is removed, try to move its streams to the default sink/source" module.version = "6.0" index: 13 name: argument: <> used: -1 load once: yes properties: module.author = "Colin Guthrie" module.description = "Always keeps at least one sink loaded even if it's a null one" module.version = "6.0" index: 15 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically set device of streams based on intended roles of devices" module.version = "6.0" index: 16 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "When a sink/source is idle for too long, suspend it" module.version = "6.0" index: 17 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Create a client for each ConsoleKit session of this user" module.version = "6.0" index: 18 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Position event sounds between L and R depending on the position on screen of the widget triggering them." module.version = "6.0" index: 19 name: argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Mute & cork streams with certain roles while others exist" module.version = "6.0" index: 20 name: argument: <> used: -1 load once: yes properties: module.author = "Colin Guthrie" module.description = "Detect when various filters are desirable" module.version = "6.0" index: 21 name: argument: <> used: -1 load once: yes properties: module.author = "Colin Guthrie" module.description = "Load filter sinks automatically when needed" module.version = "6.0" index: 22 name: argument: used: -1 load once: no properties: module.author = "Lennart Poettering" module.description = "X11 credential publisher" module.version = "6.0" index: 23 name: argument: used: -1 load once: no properties: module.author = "Lennart Poettering" module.description = "Synthesize X11 media key events when cork/uncork is requested" module.version = "6.0" index: 24 name: argument: used: 0 load once: no properties: module.author = "Jo茫o Paulo Rechi Vita" module.description = "BlueZ 5 Bluetooth audio sink and source" module.version = "6.0" index: 25 name: argument: <> used: -1 load once: no properties: module.author = "Lennart Poettering" module.description = "Command line interface protocol (UNIX sockets)" module.version = "6.0" 1 sink(s) available. * index: 1 name: driver: flags: HARDWARE DECIBEL_VOLUME LATENCY state: SUSPENDED suspend cause: IDLE priority: 9030 volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 base volume: 65536 / 100% / 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max request: 2 KiB max rewind: 0 KiB monitor source: 1 sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 fixed latency: 39.51 ms card: 0 module: 24 properties: bluetooth.protocol = "a2dp_sink" device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" ports: headset-output: Headset (priority 0, latency offset 0 usec, available: unknown) properties: active port: 1 source(s) available. * index: 1 name: driver: flags: DECIBEL_VOLUME LATENCY state: SUSPENDED suspend cause: IDLE priority: 1030 volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 base volume: 65536 / 100% / 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max rewind: 0 KiB sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 fixed latency: 39.51 ms monitor_of: 1 card: 0 module: 24 properties: device.description = "Monitor of J2-USB Bluetooth" device.class = "monitor" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" 1 client(s) logged in. index: 26 driver: owner module: 25 properties: application.name = "UNIX socket client" 1 card(s) available. index: 0 name: driver: owner module: 24 properties: device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" profiles: a2dp_sink: High Fidelity Playback (A2DP Sink) (priority 10, available: unknown) headset_head_unit: Headset Head Unit (HSP/HFP) (priority 20, available: no) off: Off (priority 0, available: yes) active profile: sinks: bluez_sink.35_BD_7B_5D_CC_AE/#1: J2-USB Bluetooth sources: bluez_sink.35_BD_7B_5D_CC_AE.monitor/#1: Monitor of J2-USB Bluetooth ports: headset-output: Headset (priority 0, latency offset 0 usec, available: unknown) properties: headset-input: Headset (priority 0, latency offset 0 usec, available: no) properties: 0 sink input(s) available. 0 source output(s) available. 0 cache entrie(s) available. root@imx6qsabresd:~#pacmd stat Memory blocks currently allocated: 1, size: 64.0 KiB. Memory blocks allocated during the whole lifetime: 53616, size: 67.8 MiB. Memory blocks imported from other processes: 0, size: 0 B. Memory blocks exported to other processes: 0, size: 0 B. Total sample cache size: 0 B. Default sample spec: s16le 2ch 44100Hz Default channel map: front-left,front-right Default sink name: bluez_sink.35_BD_7B_5D_CC_AE Default source name: bluez_sink.35_BD_7B_5D_CC_AE.monitor Memory blocks of type POOL: 1 allocated/39706 accumulated. Memory blocks of type POOL_EXTERNAL: 0 allocated/0 accumulated. Memory blocks of type APPENDED: 0 allocated/0 accumulated. Memory blocks of type USER: 0 allocated/0 accumulated. Memory blocks of type FIXED: 0 allocated/0 accumulated. Memory blocks of type IMPORTED: 0 allocated/13910 accumulated. 5.2 多声卡设备配置 root@imx6qsabresd:~# pacmd set-card-profile 1 a2dp_sink root@imx6qsabresd:~# pactl list sinks Sink #0 State: SUSPENDED Name: alsa_output.platform-sound.20.analog-stereo Description: wm8962-audio Analog Stereo Driver: module-alsa-card.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 7 Mute: no Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 Base Volume: 65536 / 100% / 0.00 dB Monitor Source: alsa_output.platform-sound.20.analog-stereo.monitor Latency: 0 usec, configured 0 usec Flags: HARDWARE DECIBEL_VOLUME LATENCY Properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" alsa.name = "" alsa.id = "HiFi wm8962-0" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "0" alsa.card = "0" alsa.card_name = "wm8962-audio" alsa.long_card_name = "wm8962-audio" device.bus_path = "platform-sound.20" sysfs.path = "/devices/soc0/sound.20/sound/card0" device.string = "hw:0" device.buffering.buffer_size = "17632" device.buffering.fragment_size = "4408" device.access_mode = "mmap" device.profile.name = "analog-stereo" device.profile.description = "Analog Stereo" device.description = "wm8962-audio Analog Stereo" module-udev-detect.discovered = "1" device.icon_name = "audio-card" Ports: analog-output-speaker: Speakers (priority: 10000, not available) analog-output-headphones: Headphones (priority: 9000, available) Active Port: analog-output-headphones Formats: pcm Sink #1 State: SUSPENDED Name: bluez_sink.35_BD_7B_5D_CC_AE Description: J2-USB Bluetooth Driver: module-bluez5-device.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 24 Mute: no Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 Base Volume: 65536 / 100% / 0.00 dB Monitor Source: bluez_sink.35_BD_7B_5D_CC_AE.monitor Latency: 0 usec, configured 0 usec Flags: HARDWARE DECIBEL_VOLUME LATENCY Properties: bluetooth.protocol = "a2dp_sink" device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" Ports: headset-output: Headset (priority: 0) Active Port: headset-output Formats: pcm root@imx6qsabresd:~# pacmd set-default-sink 1 root@imx6qsabresd:~# pactl list sources Source #0 State: SUSPENDED Name: alsa_output.platform-sound.20.analog-stereo.monitor Description: Monitor of wm8962-audio Analog Stereo Driver: module-alsa-card.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 7 Mute: no Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 Base Volume: 65536 / 100% / 0.00 dB Monitor of Sink: alsa_output.platform-sound.20.analog-stereo Latency: 0 usec, configured 0 usec Flags: DECIBEL_VOLUME LATENCY Properties: device.description = "Monitor of wm8962-audio Analog Stereo" device.class = "monitor" alsa.card = "0" alsa.card_name = "wm8962-audio" alsa.long_card_name = "wm8962-audio" device.bus_path = "platform-sound.20" sysfs.path = "/devices/soc0/sound.20/sound/card0" device.string = "0" module-udev-detect.discovered = "1" device.icon_name = "audio-card" Formats: pcm Source #1 State: SUSPENDED Name: alsa_input.platform-sound.20.analog-stereo Description: wm8962-audio Analog Stereo Driver: module-alsa-card.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 7 Mute: no Volume: front-left: 33804 / 52% / -17.25 dB, front-right: 33804 / 52% / -17.25 dB balance 0.00 Base Volume: 26090 / 40% / -24.00 dB Monitor of Sink: n/a Latency: 0 usec, configured 0 usec Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY Properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" alsa.name = "" alsa.id = "HiFi wm8962-0" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "0" alsa.card = "0" alsa.card_name = "wm8962-audio" alsa.long_card_name = "wm8962-audio" device.bus_path = "platform-sound.20" sysfs.path = "/devices/soc0/sound.20/sound/card0" device.string = "hw:0" device.buffering.buffer_size = "17632" device.buffering.fragment_size = "4408" device.access_mode = "mmap" device.profile.name = "analog-stereo" device.profile.description = "Analog Stereo" device.description = "wm8962-audio Analog Stereo" module-udev-detect.discovered = "1" device.icon_name = "audio-card" Ports: analog-input: Analog Input (priority: 10000) Active Port: analog-input Formats: pcm Source #2 State: SUSPENDED Name: bluez_sink.35_BD_7B_5D_CC_AE.monitor Description: Monitor of J2-USB Bluetooth Driver: module-bluez5-device.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 24 Mute: no Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 Base Volume: 65536 / 100% / 0.00 dB Monitor of Sink: bluez_sink.35_BD_7B_5D_CC_AE Latency: 0 usec, configured 0 usec Flags: DECIBEL_VOLUME LATENCY Properties: device.description = "Monitor of J2-USB Bluetooth" device.class = "monitor" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" Formats: pcm root@imx6qsabresd:~# pacmd set-default-source 2 5.3 测试蓝牙耳机 //在终端中使用pactl list命令查看此时的配置已经OK root@imx6qsabresd:~# pactl list sinks Sink #1 State: SUSPENDED Name: bluez_sink.35_BD_7B_5D_CC_AE Description: J2-USB Bluetooth Driver: module-bluez5-device.c Sample Specification: s16le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 24 Mute: no Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 Base Volume: 65536 / 100% / 0.00 dB Monitor Source: bluez_sink.35_BD_7B_5D_CC_AE.monitor Latency: 0 usec, configured 0 usec Flags: HARDWARE DECIBEL_VOLUME LATENCY Properties: bluetooth.protocol = "a2dp_sink" device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" Ports: headset-output: Headset (priority: 0) Active Port: headset-output Formats: pcm root@imx6qsabresd:~# pactl list cards Card #0 Name: bluez_card.35_BD_7B_5D_CC_AE Driver: module-bluez5-device.c Owner Module: 24 Properties: device.description = "J2-USB Bluetooth" device.string = "35:BD:7B:5D:CC:AE" device.api = "bluez" device.class = "sound" device.bus = "bluetooth" device.form_factor = "headset" bluez.path = "/org/bluez/hci0/dev_35_BD_7B_5D_CC_AE" bluez.class = "0x240404" bluez.alias = "J2-USB Bluetooth" device.icon_name = "audio-headset-bluetooth" device.intended_roles = "phone" Profiles: a2dp_sink: High Fidelity Playback (A2DP Sink) (sinks: 1, sources: 0, priority: 10, available: yes) headset_head_unit: Headset Head Unit (HSP/HFP) (sinks: 1, sources: 1, priority: 20, available: no) off: Off (sinks: 0, sources: 0, priority: 0, available: yes) Active Profile: a2dp_sink Ports: headset-output: Headset (priority: 0, latency offset: 0 usec) Part of profile(s): a2dp_sink, headset_head_unit headset-input: Headset (priority: 0, latency offset: 0 usec, not available) Part of profile(s): headset_head_unit 6.使用aplay软件播放音乐 6.1 aplay有时候可以正常播放，有时候不行，不清楚原因 root@imx6qsabresd:~#aplay test.wav 6.2 使用gstream播放器 //噪声测试 root@imx6qsabresd:~# gst-launch-1.0 audiotestsrc ! pulsesink Setting pipeline to PAUSED ... Pipeline is PREROLLING ... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstPulseSinkClock imx-hdmi-audio imx-hdmi-audio: HDMI Video is not ready! imx-hdmi-audio imx-hdmi-audio: ASoC: can't open platform imx-hdmi-audio: -22 //播放wav文件 root@imx6qsabresd:~# gst-launch-1.0 filesrc location=audio8k16S.wav ! wavparse ! Setting pipeline to PAUSED ... Pipeline is PREROLLING ... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstPulseSinkClock Got EOS from element "pipeline0". Execution ended after 0:00:05.090986334 Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... autoaudiosinkesd 6.3 使用paplay测试 paplay audio8k16S.wav 遇到的问题：
1. W: [pulseaudio] main.c: This program is not intended to be run as root (unless –system is specified). E: [pulseaudio] core-util.c: Home directory not accessible: Permission denied 解决办法：启动时加上pulseaudio --system

W: [pulseaudio] main.c: Running in system mode, but –disallow-exit not set! W: [pulseaudio] main.c: Running in system mode, but –disallow-module-loading not set! N: [pulseaudio] main.c: Running in system mode, forcibly disabling SHM mode! N: [pulseaudio] main.c: Running in system mode, forcibly disabling exit idle time! E: [pulseaudio] main.c: Failed to find user ‘pulse’. 解决办法：新建用户pulse root@imx6qsabresd:~#useradd pulse

启动bluetoothctl时提示No default controller available 解决办法：没有启动bluetoothd root@imx6qsabresd:~#bluetoothd&