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**claydoh** · Jun 04, 2019, 04:19 PM

It will be built against the kernel and driver stack of the specific Ubuntu release. The maintainers simply haven't gotten around to setting it up to make 19.04 packages, considering it was last updated in August

https://github.com/EHfive/pulseaudio...s-bt/issues/52

**Caesar** · Jun 04, 2019, 05:23 PM

So the only option for today is to compile it by myself, right?

**claydoh** · Jun 04, 2019, 05:45 PM

yup
.
.

**Caesar** · Jun 05, 2019, 02:28 AM

OK, so I'm trying to compile, but got to this stage

Code:

make
Scanning dependencies of target bluez5-util
[  7%] Building C object CMakeFiles/bluez5-util.dir/src/modules/bluetooth/bluez5-util.c.o
[ 14%] Building C object CMakeFiles/bluez5-util.dir/src/modules/bluetooth/a2dp/a2dp_sbc.c.o
[ 21%] Building C object CMakeFiles/bluez5-util.dir/src/modules/bluetooth/a2dp/a2dp_util.c.o
[ 28%] Building C object CMakeFiles/bluez5-util.dir/src/modules/bluetooth/backend-ofono.c.o
[ 35%] Building C object CMakeFiles/bluez5-util.dir/src/modules/bluetooth/backend-native.c.o
/home/zibi1981/Kompilowane/pulseaudio-modules-bt-master/pulseaudio-modules-bt/src/modules/bluetooth/backend-native.c:36:10: fatal error: bluetooth/bluetooth.h: Nie ma takiego pliku ani katalogu
#include <bluetooth/bluetooth.h>
       ^~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/bluez5-util.dir/build.make:115: CMakeFiles/bluez5-util.dir/src/modules/bluetooth/backend-native.c.o] Błąd 1
make[1]: *** [CMakeFiles/Makefile2:147: CMakeFiles/bluez5-util.dir/all] Błąd 2
make: *** [Makefile:130: all] Błąd 2

Any help?

P.S. I found it - the missing library was libbluetooth-dev.

P.S. 2.

After successful compilation and installation this is how it looks

Code:

zibi1981@Linux:~$ pactl list sinks | grep -e bluez -e a2dp_codec
       Nazwa: bluez_sink.00_16_94_23_65_06.a2dp_sink
       Sterownik: module-bluez5-device.c
       Źródło monitora: bluez_sink.00_16_94_23_65_06.a2dp_sink.monitor
               bluetooth.a2dp_codec = "SBC"
               device.api = "bluez"
               bluez.path = "/org/bluez/hci0/dev_00_16_94_23_65_06"
               bluez.class = "0x240404"
               bluez.alias = "HD 4.50BTNC"

So still SBC?

**Caesar** · Jun 06, 2019, 05:41 AM

It seems there is much more to compile and install (beside pulseaudio-modules-bt and ldacBT) to make my headset use aptx codec. Well, I'll have to wait for packages in this PPA to be prepared for 19.04.
I've tried to install packages prepared for 18.10, but I got this error

Code:

sudo add-apt-repository ppa:eh5/pulseaudio-a2dp
[sudo] hasło użytkownika zibi1981: 
Adds LDAC, aptX, aptX HD, AAC codecs support to PulseAudio
package: pulseaudio-module-bluetooth

HOMEPAGE: https://github.com/EHfive/pulseaudio-modules-bt

libldac: https://github.com/EHfive/ldacBT
More info: https://launchpad.net/~eh5/+archive/ubuntu/pulseaudio-a2dp
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Stary:1 http://repo.steampowered.com/steam precise InRelease
Ign.:2 http://ppa.launchpad.net/eh5/pulseaudio-a2dp/ubuntu disco InRelease                                                                                                                  
Stary:3 http://pl.archive.ubuntu.com/ubuntu disco InRelease                                                                                                                                 
Stary:4 http://pl.archive.ubuntu.com/ubuntu disco-updates InRelease                                                                                                                         
Ign.:5 http://linux.dropbox.com/ubuntu cosmic InRelease                                                                                                                                     
Stary:6 https://deb.opera.com/opera-stable stable InRelease                                                                                                                                
Błąd:7 http://ppa.launchpad.net/eh5/pulseaudio-a2dp/ubuntu disco Release                                                                                                                   
404  Not Found [IP: 91.189.95.83 80]
Stary:8 https://apt.enpass.io stable InRelease                                                                                                                 
Stary:9 http://linux.dropbox.com/ubuntu cosmic Release                                                                             
Pobieranie:10 http://pl.archive.ubuntu.com/ubuntu disco-backports InRelease [88,8 kB] 
Stary:11 http://security.ubuntu.com/ubuntu disco-security InRelease
Czytanie list pakietów... Gotowe                                  
E: The repository 'http://ppa.launchpad.net/eh5/pulseaudio-a2dp/ubuntu disco Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

EDIT

OK, I was finally able to build pulseaudio-modules-bt and ldacBT packages from GitHub on my system using checkinstall, and now my headset is using the proper audio codec

Code:

achilleus@Linux:~$ pactl list | grep a2dp_codec
           bluetooth.a2dp_codec = "aptX"

Audio quality seems much better, but I still experience some "stuttering" from time to time, as on previous SBC codec. What could be the reason?

**Caesar** · Jun 20, 2019, 01:40 AM

So I have made some research, reading and experimenting on my system to make those sound glitches gone, and found out some useful information, but still no success.

1) First of all it seems to be some kind of problem with ALSA settings. In /etc/pulse/daemon.conf there are many settings, and I've found an information on the Web, that enabling some options could do the trick

Code:

resample-method = speex-float-1
avoid-resampling = yes
default-sample-rate = 44100

After making this changes of course I did

Code:

$ pulseaudio -k
$ pulseaudio --start

AFAIK aptx codec is 16 bit and 44100Hz, so other setting could result in "glitches", but it didn't work. In fact some of these settings seemed to worsen the situation (more glitches), so I came to an idea, that this could be the right approach, but wrong answers.

2) Further useful information is in the Arch Linux wiki here and here.

A)

The newer implementation of the PulseAudio sound server uses timer-based audio scheduling instead of the traditional, interrupt-driven approach.

Timer-based scheduling may expose issues in some ALSA drivers. On the other hand, other drivers might be glitchy without it on, so check to see what works on your system.

To turn timer-based scheduling off add tsched=0 in /etc/pulse/default.pa:

Code:

/etc/pulse/default.pa
load-module module-udev-detect tsched=0

That didn't help either.

B)

Perhaps it will help to add "options ath9k btcoex_enable = 1" to the /etc/modprobe.d/ath9k.conf (with the appropriate bluetooth adapter):

Code:

/etc/modprobe.d/ath9k.conf
# possibly fix for sound glitches
options ath9k btcoex_enable = 1

Then restart.

This tip also wasn't helpful.

3) Similar tip like 2B from Ubuntu Bug reports also didn't help. The rationale behind this solution is that on Linux when WiFi and Bluetooth are on the same chip (like on my laptop), there could be some Bluetotth packet loss when WiFi is active, but I use WiFi 5Ghz al the time, and Bluetooth is 2,4GHz, and also deactivating WiFi did not resolve the problem.

By default BT audio works fine on Ubuntu - if there is no WiFi active: Both work on the same frequency range, 2 WiFi channel is about 20 Bluetooth Channels wide and every time a WiFi package is sent bluetooth risks a packet loss.

Creating a file named /etc/modprobe.d/bluetooth-audio.conf with the following content:

options ath9k btcoex_enable=1 bt_ant_diversity=1

resolves the problem and drastically increases bluetooth throughput for all other use cases (bluetooth networking that doesn't drop every time the WiFi probes something, lower latency Bluetooth HIDs.

We should ship things in a way that they work out-of-the-box => I am all for providing this file with Ubuntu, possibly with Bluez.

In the case of my laptop btcoex_enable=1 would already do the trick.

Technical background:
- https://wireless.wiki.kernel.org/en/...s/ath9k/btcoex
- https://wiki.freebsd.org/dev/ath_hal...tennaDiversity

Still looking for a solution and experimenting. Any help appreciated.

Announcement

Trying to make Sennheiser HD 4.50 BTNC headset to use aptx codec

Trying to make Sennheiser HD 4.50 BTNC headset to use aptx codec

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