I want to connect SONY headphones WH-1000XM4 with LDAC on ubuntu 20.04! !!

Hello, If you wait! This time, I connected Sony's WH-1000XM4 headphones released on September 4, 2020 with LDAC, so I would like to write about what I did!

Device information

OS ubuntu 20.04
Window manager i3 wm

bluetooth connection

This time I connected using bluetoothctl. Let's do it right away!

$ $ sudo apt install bluez #Install the bluetoothctl command used this time(Not needed if already)
$ bluetoothctl #Execute interactive command
[bluetooth]# power on #Power on the controller(Off by default)
[bluetooth]# scan on #Start scanning the device(It will be amazing if you do it outside w)
[new]Device MAC address... #Devices that can be recognized from the PC come out in a row
[bluetooth]#pair MAC address#Pair the device with the MAC address
Attempting to pair with MAC address#Try pairing with a device with a MAC address
[CHG]Device MAC address Connected: yes
Pairing successful #Success if this is displayed(If you have already paired, it will be Failed)
[bluetooth]#connect MAC address#Connect to paired devices
[CHG]Device MAC address Connected: yes
Connection successful #This and the character before the command input[bluetooth]From[Device name]Success if it changes to
[Device name]# exit

If you want to connect WH_1000XM4, please select the device name WH-1000XM4! Choosing another LE_WH_1000XM4 doesn't work! be careful!

The connection is closed! Finally I will write where I stumbled w

Install LDAC

You can install it by executing the following command, so let's do it!

$ sudo add-apt-repository ppa:berglh/pulseaudio-a2dp
$ sudo apt update
$ sudo apt install libldac pulseaudio-modules-bt
$ sudo apt install libavcodec-extra58 libfdk-aac1 bluez pulseaudio
$ sudo apt install blueman
$ pulseaudio -k
$ pulseaudio --start

About pulseaudio

Setting up the connection with LDAC

You can check the settings of the currently connected audio device with the following command, so let's do it!

$ pacmd list-cards
    index: 2
        name: <bluez_card.94_DB_56_88_DA_AC>
        driver: <module-bluez5-device.c>
        owner module: 24
                device.description = "WH-1000XM4"
                device.string = "94:DB:56:88:DA:AC"
                device.api = "bluez"
                device.class = "sound"
                device.bus = "bluetooth"
                device.form_factor = "headset"
                bluez.path = "/org/bluez/hci0/dev_94_DB_56_88_DA_AC"
                bluez.class = "0x240404"
                bluez.alias = "WH-1000XM4"
                device.icon_name = "audio-headset-bluetooth"
                device.intended_roles = "phone"
                headset_head_unit: Headset Head Unit (HSP/HFP) (priority 30, available: unknown)
                a2dp_sink_sbc: High Fidelity Playback (A2DP Sink: SBC) (priority 40, available: unknown)
                a2dp_sink_aac: High Fidelity Playback (A2DP Sink: AAC) (priority 40, available: unknown)
                a2dp_sink_aptx: High Fidelity Playback (A2DP Sink: aptX) (priority 40, available: no)
                a2dp_sink_aptx_hd: High Fidelity Playback (A2DP Sink: aptX HD) (priority 40, available: no)
                a2dp_sink_ldac: High Fidelity Playback (A2DP Sink: LDAC) (priority 40, available: yes)
                off: Off (priority 0, available: yes)
        active profile: <a2dp_sink_ldac>
                bluez_sink.94_DB_56_88_DA_AC.a2dp_sink/#2: WH-1000XM4
                bluez_sink.94_DB_56_88_DA_AC.a2dp_sink.monitor/#4: Monitor of WH-1000XM4
                headset-output: Headset (priority 0, latency offset 0 usec, available: yes)

                headset-input: Headset (priority 0, latency offset 0 usec, available: unknown)

This sample is in my condition, so it will change If there is no ldac column in profiles in this, it can not be installed above, so let's try again! If there is a available is no, unfortunately it cannot be used ... You can definitely use yes. However, you can't know unless you specify unknown, so let's specify it with the command if you want to use unknown!

$ pacmd set-card-profile 'index number' a2dp_sink_ldac

For the index number, delete'' and specify the number. In my case, it is 2! a2dp_sink_ldac can be specified as long as it is in profiles! If there are no particular errors, it is a success!

That's all! !! good job! !! I would like to write the last addictive part w

A story squeezed by WH-1000XM4 for a day

As you may have noticed from the above article, when connecting with bluetoothctl, I chose LE_WH_1000XM as eternal without knowing anything and spent a day w I would like to explain why it melted with this!

What is LE in the head?

What is this LE? I think there are many people who have doubts, so I will explain it!

This is a wireless PAN technology called Bluetooth Low Energy. This is a low power communication mode added from Bluetooth 4.0 and consists of Bluetooth Basic Rate / Enhanced Data Rate (BR / EDR) and Bluetooth Low Energy (LE). The communication speed is 1 Mbps for Bluetooth 4, 2 Mbps, 1 Mbps, 500 kbps, 125 bps for 5 but it is about 10 kbps due to various restrictions. Since we are focusing on power saving, such a result It is natural that the power consumption is low if the communication speed is minimized! w Also, the reachable distance can be set to 30m or more, but it is actually about 5m for the same reason as the communication speed. As an aside, if the communication speed is set to 125kbps with Bluetooth 5, the maximum reachable distance Seems to be a compound with 400m w

At the end

This time it ends like this! It hasn't been so long since it arrived, but this is the best! QOL explosion! !! w By the way, I made a reservation in the middle of August and got it at the fastest speed! w

Thank you for watching till the end! If I have time, I'm thinking of writing the equalizer settings in ubuntu 20.04, so please take a look there if you like!


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