[Bluez-users] btsco and not hearing or recording anything

[Bluez-users] btsco and not hearing or recording anything

[martin f krafft]

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Hi,

I just tried btsco for the first time with my BT250 headset,
connected by Bluetooth to a USB dongle plugged directly into a main
USB bus of the machine.

I can pair fine and see output, volume control and the 'answer call'
button cause btsco to receive events, but I cannot play or record
anything.

Here's what I do to record:

  piper:/usr/local/stow> arecord -D plughw:Headset bla.wav
  Recording WAVE 'bla.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono

btsco now says:

  speaker volume: 11 mic volume: 15
  i/o needed: connecting sco...
  connected SCO channel
  Done setting sco fd

then the headset beeps briefly, then btsco says:

  recieved AT+VGS=11
  Sending up speaker change 11

and then arecord and btsco just sit there and do nothing.

When I ctrl-c out of arecord, the generated file always has 44
bytes:

  -rw-r--r-- 1 madduck staff 44 2006-07-03 20:00 bla.wav

and btsco says:

  speaker volume: 11 mic volume: 15
  driver is not in use
  disconnected SCO channel

I checked the mixer and confirmed that the volume is up (75 for both
master and mic), and there's also AGC and Loopback controls, both of
which are muted (but unmuting makes no difference).

What am I overlooking?

Thanks,

-- 
martin;              (greetings from the heart of the sun.)
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                                              -- friedrich nietzsche

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Re: [Bluez-users] btsco and not hearing or recording anything

[martin f krafft]

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also sprach martin f krafft <madduck@madduck.net> [2006.07.03.2001 +0200]:
> Here's what I do to record:

     * Output from hciconfig hci0 revision (Run hciconfig as root)
          + If it prints "SCO mapping: HCI" then your adapter should
            work.

I have one of those...

          + If it prints "SCO mapping: PCM" then you might permanently
            change the setting using a command like "pskey mapsco 0"
            using bluez-utils-cvs but this is at your own risk.

and one of those...

          + If it doesn't print either of those, you probably need a
            different bluetooth adapter (preferably "CSR" based). You
            might be able to get a broadcom adapter to work if you apply
            a [8]patch to force sco mtu values (eg works for F8T012; let
            us know how it works on bluez-devel!)

and one of those...



It works on the first. Only on the first. What a shame, but I'll
just try to get ahold of a CSR adapter, as you say.

-- 
martin;              (greetings from the heart of the sun.)
  \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck
 
spamtraps: madduck.bogus@madduck.net
 
gentoo: for when overclocking gets unexciting.

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Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642

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