Re: [Bluez-users] step by step - how to get your bluetooth stereo headset fully working with the bluez software stack under linux

[Jelle de Jong <jelledejong@powercraft.nl>]

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Jelle de Jong wrote:
> Jelle de Jong wrote:
>> Chris Carlin wrote:
>>> Just to finish this up, Jelle, what type of bluetooth adapter do you 
>>> have?
>>>
>>> ~Chris
>>>
>>> Jelle de Jong wrote:
>>>> Hello everybody,
>>>>
>>>> I have been playing around with bluetooth devices under linux the 
>>>> last month or so. I got some very good and some very bad experience 
>>>> with it.
>>>>
>>>> I am planning to create some wiki pages when I can get things 
>>>> working 100%. However I still got some major issues that I need to 
>>>> overcome.
>>>>
>>>> I bought a Motorola Bluetooth S805 stereo headset. It should get the 
>>>> following functionality:
>>>>
>>>> - Playback of stereo quality audio without distortions and without 
>>>> delay when playing audio and video at the same time.
>>>> - Generic playback controls like playpause/stop/next/previous.
>>>> - Internal microphone to record audio, used for audio recordings and 
>>>> audio video conferences.
>>>>
>>>> I was planning to get things up and running step by step:
>>>> - alsa configuration
>>>> - bluetooth configuration
>>>> - input device configuration
>>>>
>>>> So the alsa configuration exist out of:
>>>> -- handle multiple audio streams (slave devices)
>>>> -- make the device default or as a plugin
>>>> -- use multiple bluetooth headset for the same audio (conference)
>>>> -- use multiple bluetooth headset per user based (multiseat)
>>>> -- force audio to use the correct bit-rate and frequency for the 
>>>> devices?
>>>> -- set-up correct buffer so that playback is without distortions of 
>>>> out of sync audio and video. (testing with totem-xine?)
>>>> -- configure multiple profiles for stereo recording/playback
>>>>
>>>> Would somebody be willing to sent his working alsa configuration 
>>>> files that can do some of the above functions:
>>>>
>>>> On this moment the headset plays stereo audio, but when watching 
>>>> video with and audio dvd on totem-xine the audio is out of sync and 
>>>> when scrolling or skipping chapters it get worse and hidd can even 
>>>> crash with segmentation faults. There is also a lot of noise 
>>>> distortions.
>>
>>
>> I attached the information about the bluetooth adapter.
>>
>> Is it a good idea to create some bug reports, then i can put all the 
>> information on one central place, and hopefully can also track the 
>> progress.
>>
>> I switched back to alsa and lib-xine because gstreamer does not 
>> handles dvd playback very well, and pulse creates a to heavy cpu load 
>> for my system.
>>
>> When playing back a dvd with totem with lib-xine and my bluetooth 
>> headset i got a few killer issues, that are directly bluez related:
>>
>> 1. when playing dvd audio, there is a audio conversion/compression 
>> problem, how higher the audio quality how greater the audio glitches. 
>> It is a really anoying glitch, it a sort of click sound.
>>
>> A/52 2.0 (stereo)
>> 48000 Hz
>> 224 kbps
>>
>> 2. When my headset connects its becomes a slave by default, and i am 
>> also using a bluetooth mouse, that is master by default. When i move 
>> my mouse the audio stops and i need to pause and play to resync audio 
>> and video. I now execute sudo hcitool sr 00:0C:55:D1:C9:78 master 
>> everytime i start using the headset, but this causes the bluetooth 
>> mouse cursor to shock when playing high quality sound. And its not a 
>> cpu issue i am not using 100%. So i got a real bandwidth priority 
>> issue with bluez....?
>>
>> Thanks in advance,
>>
>> Jelle
>>
> 
> I got a new device Motorola s9 today and did some more testing, it also 
> has the issue that it connects in a way that when using other bluetooth 
> devices the audio stops. When I manually set the device as master my 
> bluetooth mouse is somewhat more responding then with the Motorola s805 
> headset. But a reminder that everything works 100% fully under windows, 
> so it should be possible to use the devices 100% with bluez somehow...
> 
> I attached device and hcitool info in addition the my previous message.

I bought an other new bt-2400p bluetooth adapter for testing, with this 
adapter i cant get my devices manually in master mode:

sudo hcitool con
Connections:
	< ACL 00:0D:FD:18:6E:3C handle 12 state 1 lm SLAVE ENCRYPT

sudo hcitool sr 00:0D:FD:18:6E:3C master
Switch role request failed: Input/output error

I notished that when using only one bluetooth device greats a stable 
audio stream when using a bluethooth headset But when using multiple 
devices like a bluetooth headset and bluetooth mouse. The audio streams 
keeps getting interrupted for a few seconds, this happens also when not 
  touching the mouse and when both when the headset is in slave or 
master mode.

I attached all the device adapter information.

Can somebody enlight me why this is all happening?

Thanks in advance,

Jelle

[-- Attachment #2: cirago bluethooth usb adapter micro BTA-3210.txt --]
[-- Type: text/plain, Size: 1542 bytes --]

sudo hciconfig -a
hci0:   Type: USB
    BD Address: 00:1B:DC:00:3E:0B ACL MTU: 310:10 SCO MTU: 64:8
    UP RUNNING PSCAN ISCAN
    RX bytes:47051 acl:2702 sco:0 events:186 errors:0
    TX bytes:1622 acl:39 sco:0 commands:61 errors:0
    Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
    Link policy: RSWITCH HOLD SNIFF PARK
    Link mode: SLAVE ACCEPT
    Name: '[debian-eeepc] / BT Device 0'
    Class: 0x080108
    Service Classes: Capturing
    Device Class: Computer, Server
    HCI Ver: 2.0 (0x3) HCI Rev: 0xc5c LMP Ver: 2.0 (0x3) LMP Subver: 0xc5c
    Manufacturer: Cambridge Silicon Radio (10)

sudo hciconfig hci0 features
hci0:   Type: USB
    BD Address: 00:1B:DC:00:3E:0B ACL MTU: 310:10 SCO MTU: 64:8
    Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
        <3-slot packets> <5-slot packets> <encryption> <slot offset>
        <timing accuracy> <role switch> <hold mode> <sniff mode>
        <park state> <RSSI> <channel quality> <SCO link> <HV2 packets>
        <HV3 packets> <u-law log> <A-law log> <CVSD> <paging scheme>
        <power control> <transparent SCO> <broadcast encrypt>
        <EDR ACL 2 Mbps> <EDR ACL 3 Mbps> <enhanced iscan>
        <interlaced iscan> <interlaced pscan> <inquiry with RSSI>
        <extended SCO> <EV4 packets> <EV5 packets> <AFH cap. slave>
        <AFH class. slave> <3-slot EDR ACL> <5-slot EDR ACL>
        <AFH cap. master> <AFH class. master> <EDR eSCO 2 Mbps>
        <EDR eSCO 3 Mbps> <3-slot EDR eSCO> <extended features>

[-- Attachment #3: trust micro bluetooth usb adapter 15606.txt --]
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sudo hciconfig -a
hci0:   Type: USB
    BD Address: 00:1B:DC:00:32:71 ACL MTU: 310:10 SCO MTU: 64:8
    UP RUNNING PSCAN ISCAN
    RX bytes:967 acl:0 sco:0 events:27 errors:0
    TX bytes:360 acl:0 sco:0 commands:26 errors:0
    Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
    Link policy: RSWITCH HOLD SNIFF PARK
    Link mode: SLAVE ACCEPT
    Name: '[debian-eeepc] / BT Device 0'
    Class: 0x080108
    Service Classes: Capturing
    Device Class: Computer, Server
    HCI Ver: 2.0 (0x3) HCI Rev: 0xc5c LMP Ver: 2.0 (0x3) LMP Subver: 0xc5c
    Manufacturer: Cambridge Silicon Radio (10)

sudo hciconfig hci0 features
hci0:   Type: USB
    BD Address: 00:1B:DC:00:32:71 ACL MTU: 310:10 SCO MTU: 64:8
    Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
        <3-slot packets> <5-slot packets> <encryption> <slot offset>
        <timing accuracy> <role switch> <hold mode> <sniff mode>
        <park state> <RSSI> <channel quality> <SCO link> <HV2 packets>
        <HV3 packets> <u-law log> <A-law log> <CVSD> <paging scheme>
        <power control> <transparent SCO> <broadcast encrypt>
        <EDR ACL 2 Mbps> <EDR ACL 3 Mbps> <enhanced iscan>
        <interlaced iscan> <interlaced pscan> <inquiry with RSSI>
        <extended SCO> <EV4 packets> <EV5 packets> <AFH cap. slave>
        <AFH class. slave> <3-slot EDR ACL> <5-slot EDR ACL>
        <AFH cap. master> <AFH class. master> <EDR eSCO 2 Mbps>
        <EDR eSCO 3 Mbps> <3-slot EDR eSCO> <extended features>

[-- Attachment #4: trust ultra small bluetooth 2 usb adapter bt-2400p.txt --]
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sudo hciconfig hci0 -a
hci0:   Type: USB
    BD Address: 00:02:72:13:06:42 ACL MTU: 1017:8 SCO MTU: 64:8
    UP RUNNING PSCAN ISCAN
    RX bytes:24916 acl:2019 sco:0 events:612 errors:0
    TX bytes:1748434 acl:2133 sco:0 commands:39 errors:0
    Features: 0xff 0xff 0x8d 0xfe 0x9b 0xf9 0x00 0x80
    Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
    Link policy: RSWITCH HOLD SNIFF PARK
    Link mode: SLAVE ACCEPT
    Name: '[debian-eeepc] / BT Device 0'
    Class: 0x080100
    Service Classes: Capturing
    Device Class: Computer, Uncategorized
    HCI Ver: 2.0 (0x3) HCI Rev: 0x4000 LMP Ver: 2.0 (0x3) LMP Subver: 0x430e
    Manufacturer: Broadcom Corporation (15)

sudo hciconfig hci0 features
hci0:   Type: USB
    BD Address: 00:02:72:13:06:42 ACL MTU: 1017:8 SCO MTU: 64:8
    Features: 0xff 0xff 0x8d 0xfe 0x9b 0xf9 0x00 0x80
        <3-slot packets> <5-slot packets> <encryption> <slot offset>
        <timing accuracy> <role switch> <hold mode> <sniff mode>
        <park state> <RSSI> <channel quality> <SCO link> <HV2 packets>
        <HV3 packets> <u-law log> <A-law log> <CVSD> <power control>
        <transparent SCO> <broadcast encrypt> <EDR ACL 2 Mbps>
        <EDR ACL 3 Mbps> <enhanced iscan> <interlaced iscan>
        <interlaced pscan> <inquiry with RSSI> <extended SCO>
        <EV4 packets> <EV5 packets> <AFH cap. slave>
        <AFH class. slave> <3-slot EDR ACL> <5-slot EDR ACL>
        <AFH cap. master> <AFH class. master> <EDR eSCO 2 Mbps>
        <EDR eSCO 3 Mbps> <3-slot EDR eSCO> <extended features>

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