[Bluez-users] a2play question

[Bluez-users] a2play question

[Dietmar Segbert]

Hello,

since a week i am owner of the following bluetooth-devices:

ovislink bt-201usb (dongle)
ovislink stereo receiver bt-120ar
ovislink transmitter bt-120aj
I use slackware linux with a 2.4.26 kernel. All the modules for the
bluetooth where compiled.


I have installed the latest bluez-libs and -utils. Also is installed the
latest alsa-libs.
I start the bluetooth-system by a sehll-script:

#!/bin/bash
modprobe hci_usb
hcid
modprobe l2cap
modprobe bnep
modprobe sco
sdpd
hciconfig -a

The commands hcitool dev and hcitool scan detectt the dongle and the
stereo-receiver.

The output of

hcitools info 00:4F:62:05:53:8A

looks like this:

Requesting information ...	BD Address:  00:4F:62:05:53:8A	Device Name:
Stereo Receiver	LMP Version: 1.2 (0x2) LMP Subversion: 0x3d	Manufacturer:
Zeevo, Inc. (18)	Features: 0xff 0xff 0x05 0x78 0x18 0x18 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> 		<enhanced iscan> <interlaced iscan>
<interlaced pscan>
		<inquiry with RSSI> <AFH cap. slave> <AFH class. slave>
		<AFH cap. master> <AFH class. master> <extended features>


The command "sdptool browse" produces the following output:

Inquiring ...Browsing 00:4F:62:05:53:8A ...Service Name: Audio SinkService
RecHandle: 0x110bService Class ID List:  "Audio Sink" (0x110b)Protocol
Descriptor List:  "L2CAP" (0x0100)    PSM: 25  "AVDTP" (0x0019)    uint16:
0x100Language Base Attr List:  code_ISO639: 0x656e  encoding:    0x6a   
base_offset: 0x100Profile Descriptor List:  "Advanced Audio" (0x110d)     
Version: 0x0100Service Name: HeadsetService RecHandle: 0x1108Service Class
ID List:  "Headset" (0x1108)  "Generic Audio" (0x1203)Protocol Descriptor
List:  "L2CAP" (0x0100)  "RFCOMM" (0x0003)    Channel: 8Language Base Attr
List:  code_ISO639: 0x656e  encoding:    0x6a  base_offset: 0x100Profile
Descriptor List:  "Headset" (0x1108)    Version: 0x0100Service Name:
HandsfreeService RecHandle: 0x111eService Class ID List:  "Handsfree"
(0x111e)  "Generic Audio" (0x1203)Protocol Descriptor List:  "L2CAP"
(0x0100)  "RFCOMM" (0x0003)    Channel: 7Language Base Attr List:   
code_ISO639: 0x656e  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "Handsfree" (0x111e)
    Version: 0x0101


I have downloaded the btsco-0.4 package. The progs a2play, sbcenc rcfplay
compile correctly, also btsco and btsco2.
If i do a make in the /kernel directory, it appears a errormessage /lib/ 
modules/2.4.26/source cannot find such file. I can not find a kernelmodule
btsco.

The command

mpg123 --au - musik.mp3 | a2play 00:4F:62:05:53:8A -

produces no sound output only  error message.

The command

mpg123 --au - musik.mp3 | sbcenc - | a2play 00:4F:62:05:53:8A -

produces sound, but it plays to fast.

I will be happy, if you can help me.
another question ist: Can i send output of mplayer to the stereo-receiver?

Best regards.

Dietmar


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Re: [Bluez-users] a2play question

[Brad Midgley]

Dietmar

> I have downloaded the btsco-0.4 package.

I released a 0.41 package today so we have a more modern baseline.

> If i do a make in the /kernel directory, it appears a errormessage /lib/ 
> modules/2.4.26/source cannot find such file. I can not find a kernelmodule
> btsco.

The kernel module isn't required for stereo/a2dp audio.

> 
> The command
> 
> mpg123 --au - musik.mp3 | a2play 00:4F:62:05:53:8A -
> 
> produces no sound output only  error message.

you should show us the error message

> 
> The command
> 
> mpg123 --au - musik.mp3 | sbcenc - | a2play 00:4F:62:05:53:8A -
> 
> produces sound, but it plays to fast.

we may need to put your headset in the a2play list of noncompliant
devices. Marcel coded that stuff.

> another question ist: Can i send output of mplayer to the stereo-receiver?

there is a hack to create an alsa plugin that simply writes to standard
out. then the client can be run with its output piped to a2play. it's a
rather gross workaround for our nonworking alsa plugin.

brad


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Re: [Bluez-users] a2play question

[Brad Midgley]

Dietmar
> we may need to put your headset in the a2play list of noncompliant
> devices. Marcel coded that stuff.

whoops. never mind. just get v0.41 and try again.

brad


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Re: [Bluez-users] a2play question

[Dietmar Segbert]

Hello Brad,
hello list,

i have downloaded and installed btsco-0.41. I also have installed the rtc
module of the 2.4.26 kernel.

mpg123 --au - musik.mp3 | ./a2play -p 00:4F:62:05:53:8A

works, but after some seconds i can hear a dropout.

Wiht the 2.4.32 kernel the dropouts are also to hear.

Can or must i configure the headphone-profile with hcitool/sdptool, the
bt-120ar has an integrated microphon.

Regards.

Dietmar


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Re: [Bluez-users] a2play question

[Brad Midgley]

Dietmar

> i have downloaded and installed btsco-0.41. I also have installed the rtc
> module of the 2.4.26 kernel.
> 
> mpg123 --au - musik.mp3 | ./a2play -p 00:4F:62:05:53:8A
> 
> works, but after some seconds i can hear a dropout.

does it drop out for a second or so and come back? i was noticing that a
lot on a machine using nvidia drivers. i suspect they turn off
interrupts in their driver.

> Wiht the 2.4.32 kernel the dropouts are also to hear.

2.6.x may behave better

> Can or must i configure the headphone-profile with hcitool/sdptool, the
> bt-120ar has an integrated microphon.

hcitool/sdptool is not how you make the mic work and it won't help with
dropouts.

your headset runs in two modes: 2-way mono and 1-way stereo. the btsco
app is for 2-way mono and a2play is for 1-way stereo. you can't run both
the mic and stereo simultaneously on any of the headsets out there.

brad


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Re: [Bluez-users] a2play question

[Dietmar Segbert]

Hello Brad,

> bmidgley@xmission.com schrieb am 13.01.06:
> does it drop out for a second or so and come back? i was noticing
> that a lot on a machine using nvidia drivers. i suspect they turn
> off interrupts in their driver.
Difficult to explain, it sounds as you can hear the frames and betwenn the
frames is a litte dropout or beep.
I have no videodriver running, i only use linux on the console, becuase i
am blind. Only in the kernel is speakup integrated, so that i can use my
dolphin apollo hardwaresynthesizer, also i use brltty with a tieman voyger
braille display.


>> Wiht the 2.4.32 kernel the dropouts are also to hear.

> 2.6.x may behave better
Can i compile a 2.6.x kernel, when a 2.4.x kernel works?


>> Can or must i configure the headphone-profile with
>> hcitool/sdptool, the bt-120ar has an integrated microphon.

> hcitool/sdptool is not how you make the mic work and it won't help
> with dropouts.

> your headset runs in two modes: 2-way mono and 1-way stereo. the
> btsco app is for 2-way mono and a2play is for 1-way stereo. you
> can't run both the mic and stereo simultaneously on any of the
> headsets out there.

> brad


Dietmar

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Re: [Bluez-users] a2play question

[Dietmar Segbert]

Hello List,
hello Brad,

thanks for your infos. I have downloaded the btsco-04.41 release
./configure --enable-alsaplugin
make

and the package will compile.

mpg123 --au - musik.mp3 | ./a2play 00:4F:62:05:53:8A -

starts the connection and after a double-beep i can hear the music. But it
is not a continous stream. it sounds as the music stops and begins.

If i use the -p parameter for a2play, it comes a errormessage:

/dev/rtc open: no such device

and i can not hear anything.

Regards.

Dietmar


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Re: [Bluez-users] a2play question

[Brad Midgley]

Dietmar

> /dev/rtc open: no such device

running:
 modprobe rtc
may be all you need. check your distro docs for the real-time-clock enable.

brad


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