Disable A2DP

Is there any possible way on the iPhone 4 to disable A2DP?
I have the Jabra Stone bluetooth headset. This headset allows me to be connected to two different phones/devices at once, which I need since I have a work cell phone and a personal cell phone. It also has A2DP which lets me listen to music or watch videos while listening through my headset. However, I do not want this to automatically happen. In fact, I would rather disable it and then enable it when I need to.
I have a speaker dock on my desk at work and a dock in my car that plays audio through my car speakers. I always put my iPhone 4 into the dock and listen to streaming Sirius XM internet radio or listen to my own music through the iPod application. If I take my headset out of its stone charger, it will automatically begin to play the music on the headset. I do not see any way to select the output source within the Sirius application. I do not want it to play through the headset since I want to make a phone call using my work mobile phone. The good thing is if I am receiving a call on my work phone the headset will automatically pick that as the source when I take it out of its charger.
The only way I can find for this to not automatically happen is to disable bluetooth on my iPhone until I need it...Which I don't want to do, since I can't easily just enable it once I receive a call, only before I make a call.

There seems to be a serious audio output issue where the iPhone does not want to remember the desired sound output when connected to an A2DP bluetooth device (Jawbone Era). I am able to switch my output to "Dock" rather than "Jawbone", however, every time I finish a call on my bluetooth the interrupted music starts playing from my bluetooth headset rather than the original source selected (my car audio "dock"). I have to go back into the output settings in "iPod" and select the "dock" while driving.
This problem creates unnecessary fumbling and distractions while driving with my bluetooth device. To make matters worse, the music is always blaring in my ear after the call. This really causes a hazardous situation where I'm forced to focus on my gizmos rather than the road ahead.
Apple dudes, this is a very dangerous problem that needs to be addressed! Please add the option of switching off a pared devices A2DP music settings. All it takes is one switch in the bluetooth device settings. Another option may be to lock the desired output.
The iPhone and Jawbone are a great combo but this is something that needs immediate attention from your dev team.
P.S. I would gladly accept a position in your company if you would like to hire me.
Message was edited by: Dankobe

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Message Edited by panicbutton on 20-Jul-2009 09:34 PM

There is a slight delay when the phone and headset begin to communicate for A2DP audio. Usually, things like calendar and SMS alerts are too short to be heard in the headset. You'll notice that if you are actively listening to music streaming to the headset from the phone or having a conversation, you will hear the alerts.
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[Solved] Bluetooth A2DP source to pulseaudio OR ALSA

Edit
So, I'm happy to say that I have it working to some degree!
I wasn't happy with the default bluez tools, but I managed to find a useful set of tools which seemed to work better: http://gitorious.org/bluez-tools/bluez-tools/
I compiled and make'd them, then created the following startup script to set up everything in the order it is needed for the next part to work: https://gist.github.com/c990e397388bd4399a15
I made a file called bluetoothPin in the home directory with the following in it:
<My phone's MAC (without the angle brackets)> <A Pin Number>
The bt-agent command in the startup.sh script uses that file to authorise connections. I aim to modify it to allow any connection to connect with the same pin, I'll get into that later.
For the actual streaming, I installed qt so I could get the qdbus binary, then I followed the instructions here: http://ubuntuforums.org/showthread.php? … st10492742
That code worked, so I modified it a little so that it would wait for a connection, then make the connection, then wait for a new connection on disconnect: https://gist.github.com/8e32a9cf786995c00f2f
It's not perfect; things get a bit iffy when you try to pair and then connect a device without rebooting the pi: It disconnects gracefully, and it pairs correctly, but pulse doesn't seem to re-add it to its list, so it's no longer identified by my script. Also I haven't figured out how to pair any device against the same pin code yet. Any help with that would be awesome!
Hi there,
I'm trying to build a bluetooth audio receiver server for my car! I have a raspberry pi with arch installed on it, bluez set up and configured (I can pair my phone with it through the bluez-simple-agent, although I think I'll have to write my own pairing daemon to auto-pair anything that attempts to connect).
Baby steps though: I've got bluez all set up as I mentioned earlier, but pulse doesn't seem to "see" the bluetooth connection. I'm not sure exactly what information you guys need to help me, but I've tried to add everything I could think of:
[root@alarmpi ~]# tail /var/log/messages.log
Oct 20 18:25:22 alarmpi bluetoothd[112]: bluetoothd[112]: Endpoint registered: sender=:1.4 path=/MediaEndpoint/A2DPSource
Oct 20 18:25:22 alarmpi bluetoothd[112]: bluetoothd[112]: Endpoint registered: sender=:1.4 path=/MediaEndpoint/A2DPSink
Oct 20 18:25:22 alarmpi bluetoothd[112]: Endpoint registered: sender=:1.4 path=/MediaEndpoint/HFPAG
Oct 20 18:25:22 alarmpi bluetoothd[112]: Endpoint registered: sender=:1.4 path=/MediaEndpoint/HFPHS
Oct 20 18:25:22 alarmpi bluetoothd[112]: Endpoint registered: sender=:1.4 path=/MediaEndpoint/A2DPSource
Oct 20 18:25:22 alarmpi bluetoothd[112]: Endpoint registered: sender=:1.4 path=/MediaEndpoint/A2DPSink
Oct 20 18:25:22 alarmpi pulseaudio[165]: [pulseaudio] server-lookup.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
Oct 20 18:25:22 alarmpi pulseaudio[165]: [pulseaudio] main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
Oct 20 18:39:57 alarmpi systemd[1]: Starting Cleanup of Temporary Directories...
Oct 20 18:39:57 alarmpi systemd[1]: Started Cleanup of Temporary Directories.
[root@alarmpi ~]#
This is interesting... to me it looks like bluetoothd is registering with pulse here.
[root@alarmpi ~]# pactl list
Module #0
Name: module-device-restore
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Automatically restore the volume/mute state of devices"
module.version = "2.1"
Module #1
Name: module-stream-restore
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Automatically restore the volume/mute/device state of streams"
module.version = "2.1"
Module #2
Name: module-card-restore
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Automatically restore profile of cards"
module.version = "2.1"
Module #3
Name: module-augment-properties
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Augment the property sets of streams with additional static information"
module.version = "2.1"
Module #4
Name: module-alsa-card
Argument: device_id="0" name="platform-bcm2835_AUD0.0" card_name="alsa_card.platform-bcm2835_AUD0.0" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes card_properties="module-udev-detect.discovered=1"
Usage counter: 0
Properties:
module.author = "Lennart Poettering"
module.description = "ALSA Card"
module.version = "2.1"
Module #5
Name: module-udev-detect
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Detect available audio hardware and load matching drivers"
module.version = "2.1"
Module #6
Name: module-bluetooth-discover
Argument:
Usage counter: n/a
Properties:
module.author = "Joao Paulo Rechi Vita"
module.description = "Detect available bluetooth audio devices and load bluetooth audio drivers"
module.version = "2.1"
Module #7
Name: module-esound-protocol-unix
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "ESOUND protocol (UNIX sockets)"
module.version = "2.1"
Module #8
Name: module-native-protocol-unix
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Native protocol (UNIX sockets)"
module.version = "2.1"
Module #9
Name: module-default-device-restore
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Automatically restore the default sink and source"
module.version = "2.1"
Module #10
Name: module-rescue-streams
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "When a sink/source is removed, try to move their streams to the default sink/source"
module.version = "2.1"
Module #11
Name: module-always-sink
Argument:
Usage counter: n/a
Properties:
module.author = "Colin Guthrie"
module.description = "Always keeps at least one sink loaded even if it's a null one"
module.version = "2.1"
Module #12
Name: module-intended-roles
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Automatically set device of streams based of intended roles of devices"
module.version = "2.1"
Module #13
Name: module-suspend-on-idle
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "When a sink/source is idle for too long, suspend it"
module.version = "2.1"
Module #14
Name: module-console-kit
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Create a client for each ConsoleKit session of this user"
module.version = "2.1"
Module #15
Name: module-systemd-login
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Create a client for each login session of this user"
module.version = "2.1"
Module #16
Name: module-position-event-sounds
Argument:
Usage counter: n/a
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 = "2.1"
Module #17
Name: module-role-cork
Argument:
Usage counter: n/a
Properties:
module.author = "Lennart Poettering"
module.description = "Mute & cork streams with certain roles while others exist"
module.version = "2.1"
Module #18
Name: module-filter-heuristics
Argument:
Usage counter: n/a
Properties:
module.author = "Colin Guthrie"
module.description = "Detect when various filters are desirable"
module.version = "2.1"
Module #19
Name: module-filter-apply
Argument:
Usage counter: n/a
Properties:
module.author = "Colin Guthrie"
module.description = "Load filter sinks automatically when needed"
module.version = "2.1"
Module #20
Name: module-dbus-protocol
Argument:
Usage counter: n/a
Properties:
module.author = "Tanu Kaskinen"
module.description = "D-Bus interface"
module.version = "2.1"
Module #21
Name: module-switch-on-port-available
Argument:
Usage counter: n/a
Properties:
Sink #0
State: SUSPENDED
Name: alsa_output.platform-bcm2835_AUD0.0.analog-stereo
Description: bcm2835 ALSA Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 4
Mute: no
Volume: 0: 86% 1: 86%
0: -4.00 dB 1: -4.00 dB
balance 0.00
Base Volume: 86%
-4.00 dB
Monitor Source: alsa_output.platform-bcm2835_AUD0.0.analog-stereo.monitor
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 = "bcm2835 ALSA"
alsa.id = "bcm2835 ALSA"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "bcm2835 ALSA"
alsa.long_card_name = "bcm2835 ALSA"
alsa.driver_name = "snd_bcm2835"
device.bus_path = "platform-bcm2835_AUD0.0"
sysfs.path = "/devices/platform/bcm2835_AUD0.0/sound/card0"
device.string = "hw:0"
device.buffering.buffer_size = "17632"
device.buffering.fragment_size = "4416"
device.access_mode = "serial"
device.profile.name = "analog-stereo"
device.profile.description = "Analog Stereo"
device.description = "bcm2835 ALSA Analog Stereo"
alsa.mixer_name = "Broadcom Mixer"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card"
Ports:
analog-output: Analog Output (priority: 9900)
Active Port: analog-output
Formats:
pcm
Source #0
State: SUSPENDED
Name: alsa_output.platform-bcm2835_AUD0.0.analog-stereo.monitor
Description: Monitor of bcm2835 ALSA Analog Stereo
Driver: module-alsa-card.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 4
Mute: no
Volume: 0: 100% 1: 100%
0: 0.00 dB 1: 0.00 dB
balance 0.00
Base Volume: 100%
0.00 dB
Monitor of Sink: alsa_output.platform-bcm2835_AUD0.0.analog-stereo
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY
Properties:
device.description = "Monitor of bcm2835 ALSA Analog Stereo"
device.class = "monitor"
alsa.card = "0"
alsa.card_name = "bcm2835 ALSA"
alsa.long_card_name = "bcm2835 ALSA"
alsa.driver_name = "snd_bcm2835"
device.bus_path = "platform-bcm2835_AUD0.0"
sysfs.path = "/devices/platform/bcm2835_AUD0.0/sound/card0"
device.string = "0"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card"
Formats:
pcm
Client #0
Driver: module-systemd-login.c
Owner Module: 15
Properties:
application.name = "Login Session c1"
systemd-login.session = "c1"
Client #2
Driver: protocol-native.c
Owner Module: 8
Properties:
application.name = "pactl"
native-protocol.peer = "UNIX socket client"
native-protocol.version = "26"
application.process.id = "253"
application.process.user = "root"
application.process.host = "alarmpi"
application.process.binary = "pactl"
application.language = "C"
application.process.machine_id = "5c49cb5bf08724338eb09a6900092bb0"
Card #0
Name: alsa_card.platform-bcm2835_AUD0.0
Driver: module-alsa-card.c
Owner Module: 4
Properties:
alsa.card = "0"
alsa.card_name = "bcm2835 ALSA"
alsa.long_card_name = "bcm2835 ALSA"
alsa.driver_name = "snd_bcm2835"
device.bus_path = "platform-bcm2835_AUD0.0"
sysfs.path = "/devices/platform/bcm2835_AUD0.0/sound/card0"
device.string = "0"
device.description = "bcm2835 ALSA"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card"
Profiles:
output:analog-mono: Analog Mono Output (sinks: 1, sources: 0, priority. 100)
output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority. 6000)
off: Off (sinks: 0, sources: 0, priority. 0)
Active Profile: output:analog-stereo
Ports:
analog-output: Analog Output (priority: 9900)
Part of profile(s): output:analog-mono, output:analog-stereo
[root@alarmpi ~]# cat /etc/bluetooth/audio.conf
# Configuration file for the audio service
# This section contains options which are not specific to any
# particular interface
[General]
Enable=Source
# Switch to master role for incoming connections (defaults to true)
#Master=true
# If we want to disable support for specific services
# Defaults to supporting all implemented services
#Disable=Gateway,Source,Socket
# SCO routing. Either PCM or HCI (in which case audio is routed to/from ALSA)
# Defaults to HCI
#SCORouting=PCM
# Automatically connect both A2DP and HFP/HSP profiles for incoming
# connections. Some headsets that support both profiles will only connect the
# other one automatically so the default setting of true is usually a good
# idea.
#AutoConnect=true
# Headset interface specific options (i.e. options which affect how the audio
# service interacts with remote headset devices)
[Headset]
# Set to true to support HFP, false means only HSP is supported
# Defaults to true
HFP=true
# Maximum number of connected HSP/HFP devices per adapter. Defaults to 1
MaxConnected=1
# Set to true to enable use of fast connectable mode (faster page scanning)
# for HFP when incoming call starts. Default settings are restored after
# call is answered or rejected. Page scan interval is much shorter and page
# scan type changed to interlaced. Such allows faster connection initiated
# by a headset.
FastConnectable=false
# Just an example of potential config options for the other interfaces
#[A2DP]
SBCSources=1
MPEG12Sources=0
[root@alarmpi ~]# cat /etc/asound.conf
# Use PulseAudio by default
pcm.!default {
type pulse
fallback "sysdefault"
hint {
show on
description "Default ALSA Output (currently PulseAudio Sound Server)"
ctl.!default {
type pulse
fallback "sysdefault"
# vim:set ft=alsaconf:
About my project in general:
I want to be able to do the following:
- Give pulseaudio access to the bluetooth device, and use the A2DP protocol to receive the audio. From my research, it is possible, but I'm not sure how.
- Open up bluez so that I can pair any device by connecting with "1234" for the auth, then it will automatically check for A2DP and give that information to pulse
The idea being that any bluetooth device can pair without any interaction from the raspberry pi, and then pulse will have access to all of the devices which are playing music.
1] Is this even possible?
2] Can I use alsa instead as it seems it'd be easier/lighter to manage?
3] Are there any documents other than arch's bluetooth and pulse wikis that I can read to help me figure this out?
Last edited by s0l1dsnak3123 (2012-10-20 23:53:01)

Actually I've solved it myself by looking at the wiki page I posted.
I am not sure about what you said but PulseAudio doesn't require ALSA (alsa-lib, alsa-utils, sort of) to play sound except when with those applications that do not have direct support (now even Flash have that). But maybe the drivers for sound cards in Linux kernel could be said as a part of ALSA, then I am not sure about those stuff.
Last edited by tom.yan (2011-08-11 06:47:35)

Bluetooth devices can't reconnect to iPhone 4 after some time or when A2DP playback has stopped (since iOS 5)

Hi,
so I've had these Bluetooth issues since I updated my iPhone 4 to iOS 5. I've searched and searched and found nothing, so finally I decided to post my story here.
First of all I'd like to point out: I've tried everything! ..but more on this below.
I have a Bluetooth capable car stereo, the Sony BT2600, in my car. It works like a charm and I've been using it for listening to music via A2DP (Bluetooth Stereo Audio) since I updated my HTC Prophet to Windows Mobile 6 back in 2008. Since 2009 I've been using it with an iPhone 3G, then a 3GS, and finally with my iPhone 4, which I've owned since october 2010.
Calling worked, listening to music worked, and since iOS 3, I think, AVRCP has been working fine, too.
Now to the things that worked until before the iOS 5 update:
When I got into my car, turned on the ignition, the car stereo automatically tries to connect to the last connected device, so unless BT was disabled on the iPhone, it connected without problems and I could start music playback by pressing the Play/Pause button on the unit, without having to pull the iPhone out of my pocket.
When I got out of my car, turned the ignition, and thus, the car stereo, off, the iPhone would of course disconnect.
Here's where it becomes interesting: When I would go for another drive in my car, the head unit would reconnect to the iPhone, just as in the first point of this list.
Same when starting the car's engine, which cuts the power to the head unit for one second. It would automatically reconnect to the phone and I could press the Play/Pause button twice to resume playback.
Furthermore, when Repeat was not enabled on the iPhone's iPod application and the current album / playlist / podcast would end, the Bluetooth connection would remain active, which was good, because I would still be able to receive calls using the hands-free functionality of the Sony head unit, and I could restart playback by pressing the Play/Pause button on the latter.
My Apple aluminum Wireless Keyboard would also connect flawlessly whenever BT was enabled on the iPhone.
Also the Bluetooth tethering feature would work fine - I could just connect to it via my MacBook's Bluetooth menu, without having to do anything with the iPhone.
Since I updated to iOS 5,
my car stereo doesn't connect to the iPhone unless it's been less than a minute that I'd enabled Bluetooth on the iPhone.
same with the keyboard.
When music playback stops (at the end of an album/playlist/podcast, with Repeat disabled), the whole Bluetooth connection is instantly lost, and can't be regained until I disable and re-enable Bluetooth on the iPhone. Which means that I can't take calls in my car after listening to an album or podcast or playlist when I forget to enable Repeat.
Whenever I have to re-start my car's engine, the connection is, in more than half of the cases, lost until disabling and re-enabling BT on the iPhone.
Same with tethering.
What I've tried so far:
deleted all BT devices from the iPhone's list, re-paired - nothing
rebooted, many, many times - nothing
restored to iOS 5.0.1 - nothing
hit "Reset Network Preferences" - nothing, the BT devices even stay in the list
hit "Delete All Settings" on the iPhone - nothing, BT device list still the same
restored to 5.0.1 again - nothing
restored to iOS 5.1 - nothing
restored to iOS 5.1 from DFU mode, setting up the iPhone "as new iPhone". Big step, PITA, but still - nothing. At least this has cleared the BT device list. But the issues remain. (So does the battery drain issue, by the way, but that's another story)
So. I've oficially run out of ideas. Any inspiration? Many thanks in advance.

I've noticed this lately as well, with my iPhone 4. I couldn't confidently pin it directly on any particular iOS update, but my iPhone used to automatically connect up via Bluetooth with my Prius's handsfree feature, and now it doesn't. I work with a CE-based device at my job, with Bluetooth capability, and I used to test out that feature by having it discover my iPhone. This no longer works either.
What I have found (not really a solution, but it does work and may be a clue for Apple) is that if I simply go to the Settings app then the General -> Bluetooth screen and let it sit there, it will pair right up with my car within a few seconds. Bluetooth is always on, and always says "Now Discoverable" at the bottom of the settings screen.

Bluetooth A2DP and Speakable Items

I would like to get a bluetooth headset for my phone, but it would be nice if I could use it for speakable items as well. In Tiger, I remember that headsets were not supported by speakable items due to their low sound quality.
Since Leopard now supports the A2DP profile, it is possible to use those headsets with speakable items?
Also, does anyone happen to know if the headset can be paired with my phone and my Mac at the same time?

I had a similar experience with the Motorokr S9-HD and found at least a workaround. It seemed when I connected to non A2DP headset, whether it was used or not, the S9-HD could no longer control the playback. If I shut down the iPhone and the headsets and then restarted the iPhone and the S9-HD but not the other non A2DP headset it would again control the play function.
I had the same problem with the 3G but on the 3G the skip and replay/back functions worked with the S9-HD but these functions do not work on the 3GS.
I have also noticed that the audio stream cuts out and I believe this is caused when my exchange server is doing a push - with push disabled I do not have the problem.
Hope this helps and hopefully Apple will get these issues fixed ASAP.

Does use of bluetooth headphones disable your iMac's headphone jack?

I know that if you plug corded headphones into your iMac, your iMac's internal speakers are automatically disabled.
But, if you connect (pair) bluetooth headphones to your iMac, does that disable your iMac's headphone jack? Or could you use corded and bluetooth headphones simultaneously?

You can use any bluetooth stereo headphones with your Mac (stereo, A2DP, requires Leopard), though Apple doesn't make any or sell any made by third parties.

Disable A2DP

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