btsco - headset profile activated but no sco packets transmitted ???

Hi there,

while running btsco I can successfully change my mixersettings via the headset, so I assume the connection has been established just fine:

root@sigma:~/src/btsco# ./btsco -v 00:07:A4:95:41:76 2
btsco v0.4
Device is 1:0
Voice setting: 0x0060
RFCOMM channel 2 connected
recieved AT+BRSF=24
recieved AT+VGS=03
Sending up speaker change 3
recieved AT+VGS=07
Sending up speaker change 7
recieved AT+VGS=11
Sending up speaker change 11
recieved AT+VGS=15
Sending up speaker change 15
speaker volume: 15 mic volume: 1
driver is in use
connected SCO channel
Done setting sco fd

But I can neither hear sound nor record anything via the Jabra BT110 headset using BlueZ 20050328 with kernel 2.6.11:

aplay -D plughw:Headset test.wav
Playing Sparc Audio 'test.wav' : Mu-Law, Rate 8000 Hz, Mono

I just hear a raise in static when playback commences (even though mixer levels are maxed in alsamixer!)...

snd-bt-sco revision 1.6 $
snd-bt-sco: snd-bt-scod thread starting
snd-bt-sco: playback_open
snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 2000
snd-bt-sco: playback_trigger 1
snd-bt-sco: setting playback to bspcm

root@sigma:~# hcitool con
Connections:
        < SCO 00:07:A4:95:41:76 handle 44 state 1 lm SLAVE
        < ACL 00:07:A4:95:41:76 handle 41 state 1 lm MASTER
root@sigma:~# hciconfig hci0
hci0:   Type: USB
        BD Address: 00:02:72:80:A5:D3 ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:9966 acl:207 sco:0 events:535 errors:0
        TX bytes:6279 acl:191 sco:0 commands:195 errors:0

root@sigma:~# hciconfig hci0 revision
hci0:   Type: USB
        BD Address: 00:02:72:80:A5:D3 ACL MTU: 192:8 SCO MTU: 64:8
        HCI 16.14
        Chip version: BlueCore02-External
        Max key size: 56 bit
        SCO mapping:  HCI

Audio works fine with that headset and dongle using the Widcomm stack 1.4 under Windoze ;(...

Regards,
Lars

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Oops, forgot that info here:

root@sigma:~# hcitool info 00:07:A4:95:41:76
Requesting information ...
        BD Address:  00:07:A4:95:41:76
        Device Name: Jabra BT110
        LMP Version: 1.2 (0x2) LMP Subversion: 0x613
        Manufacturer: Cambridge Silicon Radio (10)
        Features: 0xfc 0xff 0x0b 0x00 0x00 0x00 0x00 0x00
                <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> <transparent SCO>

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Was away for a few days, thanks for the replies which unfortunately seem to suggest this is not a mere configuration issue I can fix from my side.

I've tried Linux 2.6.11.7 next and refetched btsco from cvs today: One thing that seems to have changed is that I now get the confirmation tone from the headset whenever aplay or arecord are started - unfortunately I can still neither hear or record any audio with it (even though that works fine using the Widcomm stack)...

hciconfig -a
hci0: Type: USB

        BD Address: 00:02:72:80:A5:D3 ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:13064 acl:364 sco:0 events:722 errors:0
        TX bytes:8126 acl:339 sco:0 commands:182 errors:0
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'localhost-0'
        Class: 0x3e0100
        Service Classes: Networking, Rendering, Capturing
        Device Class: Computer, Uncategorized
        HCI Ver: 1.1 (0x1) HCI Rev: 0x33c LMP Ver: 1.1 (0x1) LMP Subver:

0x33c
Manufacturer: Cambridge Silicon Radio (10)

Bluetooth: Core ver 2.7
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP ver 2.7
Bluetooth: L2CAP socket layer initialized
Bluetooth: RFCOMM ver 1.5
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM TTY layer initialized

root@sigma:~# btsco -v 00:07:A4:95:41:76
btsco v0.4
Device is 1:0
Voice setting: 0x0060
RFCOMM channel 1 connected
recieved AT+CKPD=200
speaker volume: 3 mic volume: 15
driver is in use
connected SCO channel
Done setting sco fd
recieved AT+VGS=15
Sending up speaker change 15
recieved AT+VGS=03
Sending up speaker change 3
recieved AT+VGS=07
Sending up speaker change 7
recieved AT+VGS=11
Sending up speaker change 11
speaker volume: 11 mic volume: 15
driver is not in use
disconnected SCO channel
speaker volume: 11 mic volume: 15
driver is in use
connected SCO channel
Done setting sco fd
recieved AT+VGS=11
Sending up speaker change 11
speaker volume: 11 mic volume: 15
driver is not in use
disconnected SCO channel
RFCOMM channel lost

snd-bt-sco revision 1.6 $
snd-bt-sco: snd-bt-scod thread starting
snd-bt-sco: playback_open
Bluetooth: SCO (Voice Link) ver 0.4
Bluetooth: SCO socket layer initialized
snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 2000
snd-bt-sco: playback_trigger 1
snd-bt-sco: setting playback to bspcm
snd-bt-sco: playback_trigger 0
snd-bt-sco: setting playback to NULL
snd-bt-sco: Disposing of previous socket count 2
snd-bt-sco: capture_open
snd-bt-sco: capture_prepare
snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 2000
snd-bt-sco: capture_trigger 1
snd-bt-sco: setting capture to bspcm
snd-bt-sco: capture_trigger 0
snd-bt-sco: setting capture to NULL
snd-bt-sco: Disposing of previous socket count 2

--
HCI sniffer - Bluetooth packet analyzer ver 1.19
device: hci0 snap_len: 1028 filter: 0xffffffff
< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:07:A4:95:41:76 ptype 0xcc18 rswitch 0x01 clkoffset 0x0000 Packet type: DM1 DM3 DM5 DH1 DH3 DH5

0000: 00 01 05 04 ....

0000: 76 41 95 a4 07 00 vA....
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22

    bdaddr 00:07:A4:95:41:76
    Link key: 39b150b8640b812d72b82f572be54b85

0000: 01 0b 04 00 76 41 95 a4 07 00 ....vA....

0000: 00 2b 00 76 41 95 a4 07 00 01 01 .+.vA......
< ACL data: handle 43 flags 0x02 dlen 12

    L2CAP(s): Connect req: psm 1 scid 0x0040

< HCI Command: Write Link Policy Settings (0x02|0x000d) plen 4
handle 43 policy 0x0f
Link policy: RSWITCH HOLD SNIFF PARK

0000: 01 2b 00 01 00 .+...

0000: 01 0d 08 00 2b 00 ....+.

0000: 76 41 95 a4 07 00 01 vA.....

L2CAP(s): Connect rsp: dcid 0x006a scid 0x0040 result 1 status 2
Connection pending - Authorization pending

    L2CAP(s): Connect rsp: dcid 0x006a scid 0x0040 result 0 status 0
      Connection successful
< ACL data: handle 43 flags 0x02 dlen 12
    L2CAP(s): Config req: dcid 0x006a flags 0x00 clen 0

0000: 01 2b 00 01 00 .+...

    L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result 0 clen 0
      Success

    L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
      MTU 48 
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x006a flags 0x00 result 0 clen 0
      Success
< ACL data: handle 43 flags 0x02 dlen 24
    L2CAP(d): cid 0x006a len 20 [psm 1]
        SDP SSA Req: tid 0x0 len 0xf
          pat uuid-16 0x1108 (Headset)
          max 65535
          aid(s) 0x0000 - 0xffff
          cont 00

0000: 01 2b 00 01 00 .+...

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0040 len 48 [psm 1]
        SDP SSA Rsp: tid 0x0 len 0x2b
          count 38
          cont 02 00 22
< ACL data: handle 43 flags 0x02 dlen 26
    L2CAP(d): cid 0x006a len 22 [psm 1]
        SDP SSA Req: tid 0x1 len 0x11
          pat uuid-16 0x1108 (Headset)
          max 65535
          aid(s) 0x0000 - 0xffff
          cont 02 00 22

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0040 len 42 [psm 1]
        SDP SSA Rsp: tid 0x1 len 0x25
          count 34
          record #0
              aid 0x0000 (SrvRecHndl)
                 uint 0x10000
              aid 0x0001 (SrvClassIDList)
                 < uuid-16 0x1108 (Headset) uuid-16 0x1203 (Audio) >
              aid 0x0004 (ProtocolDescList)
                 < < uuid-16 0x0100 (L2CAP) > <
                 uuid-16 0x0003 (RFCOMM) uint 0x1 > >
              aid 0x0009 (BTProfileDescList)
                 < < uuid-16 0x1108 (Headset) uint 0x100 > >
              aid 0x0100 (SrvName)
                 str "Headset"
              aid 0x0302 (unknown)
                 bool 0x1
          cont 00
< ACL data: handle 43 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x006a scid 0x0040

< HCI Command: Read Voice Setting (0x03|0x0025) plen 0

0000: 01 2b 00 01 00 .+...

0000: 01 25 0c 00 60 00 .%..`.
< ACL data: handle 43 flags 0x02 dlen 12

    L2CAP(s): Connect req: psm 3 scid 0x0041

    L2CAP(s): Disconn rsp: dcid 0x006a scid 0x0040

0000: 01 2b 00 01 00 .+...

L2CAP(s): Connect rsp: dcid 0x006b scid 0x0041 result 1 status 2
Connection pending - Authorization pending

    L2CAP(s): Connect rsp: dcid 0x006b scid 0x0041 result 0 status 0
      Connection successful
< ACL data: handle 43 flags 0x02 dlen 16
    L2CAP(s): Config req: dcid 0x006b flags 0x00 clen 4
      MTU 1024 

0000: 01 2b 00 01 00 .+...

    L2CAP(s): Config rsp: scid 0x0041 flags 0x00 result 0 clen 0
      Success

    L2CAP(s): Config req: dcid 0x0041 flags 0x00 clen 4
      MTU 1024 
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(s): Config rsp: scid 0x006b flags 0x00 result 0 clen 0
      Success
< ACL data: handle 43 flags 0x02 dlen 8
    L2CAP(d): cid 0x006b len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 0 pf 1 ilen 0 fcs 0x1c 

0000: 01 2b 00 01 00 .+...

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7 

< ACL data: handle 43 flags 0x02 dlen 18
L2CAP(d): cid 0x006b len 14 [psm 3]
RFCOMM(s): PN CMD: cr 1 dlci 0 pf 0 ilen 10 fcs 0x70 mcc_len 8 dlci 2 frame_type 0 credit_flow 15 pri 7 ack_timer 0 frame_size 1019 max_retrans 0 credits 7

0000: 01 2b 00 01 00 .+...

L2CAP(d): cid 0x0041 len 14 [psm 3]
RFCOMM(s): PN RSP: cr 0 dlci 0 pf 0 ilen 10 fcs 0xaa mcc_len 8 dlci 2 frame_type 0 credit_flow 14 pri 7 ack_timer 0 frame_size 127 max_retrans 0 credits 0
< ACL data: handle 43 flags 0x02 dlen 8

    L2CAP(d): cid 0x006b len 4 [psm 3]
      RFCOMM(s): SABM: cr 1 dlci 2 pf 1 ilen 0 fcs 0x59 

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 2 pf 1 ilen 0 fcs 0x92 
< ACL data: handle 43 flags 0x02 dlen 12
    L2CAP(d): cid 0x006b len 8 [psm 3]
      RFCOMM(s): MSC CMD: cr 1 dlci 0 pf 0 ilen 4 fcs 0x70 mcc_len 2
      dlci 2 fc 0 rtc 1 rtr 1 ic 0 dv 1 b1 0 b2 0 b3 0 len 0

    L2CAP(d): cid 0x0041 len 8 [psm 3]
      RFCOMM(s): MSC CMD: cr 0 dlci 0 pf 0 ilen 4 fcs 0xaa mcc_len 2
      dlci 2 fc 0 rtc 1 rtr 1 ic 0 dv 0 b1 0 b2 0 b3 0 len 0

0000: 01 2b 00 01 00 .+...
< ACL data: handle 43 flags 0x02 dlen 12

    L2CAP(d): cid 0x006b len 8 [psm 3]
      RFCOMM(s): MSC RSP: cr 1 dlci 0 pf 0 ilen 4 fcs 0x70 mcc_len 2
      dlci 2 fc 0 rtc 1 rtr 1 ic 0 dv 0 b1 0 b2 0 b3 0 len 0

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 8 [psm 3]
      RFCOMM(s): MSC RSP: cr 0 dlci 0 pf 0 ilen 4 fcs 0xaa mcc_len 2
      dlci 2 fc 0 rtc 1 rtr 1 ic 0 dv 1 b1 0 b2 0 b3 0 len 0
< ACL data: handle 43 flags 0x02 dlen 9
    L2CAP(d): cid 0x006b len 5 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 1 ilen 0 fcs 0x86 credits 33

    L2CAP(d): cid 0x0041 len 5 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 0 fcs 0x5c credits 15

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 16 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 0 ilen 12 fcs 0x40 
      0000: 41 54 2b 43 4b 50 44 3d  32 30 30 0d              AT+CKPD=200.
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(d): cid 0x006b len 10 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a 
      0000: 0d 0a 4f 4b 0d 0a                                 ..OK..

0000: 01 2b 00 01 00 .+...
< ACL data: handle 43 flags 0x02 dlen 17

    L2CAP(d): cid 0x006b len 13 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 9 fcs 0x9a 
      0000: 41 54 2b 56 47 53 3d 33  0d                       AT+VGS=3.
< ACL data: handle 43 flags 0x02 dlen 18
    L2CAP(d): cid 0x006b len 14 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 10 fcs 0x9a 
      0000: 41 54 2b 56 47 4d 3d 31  35 0d                    AT+VGM=15.

< HCI Command: Add SCO Connection (0x01|0x0007) plen 4
handle 43 ptype 0x00e0
Packet type: HV1 HV2 HV3

0000: 00 01 07 04 ....

0000: 00 2e 00 76 41 95 a4 07 00 00 01 ...vA......

0000: 01 2b 00 01 00 .+...

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 15 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 10 fcs 0x5c credits 3
      0000: 41 54 2b 56 47 53 3d 31  35 0d                    AT+VGS=15.
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(d): cid 0x006b len 10 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a 
      0000: 0d 0a 4f 4b 0d 0a                                 ..OK..

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 15 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 10 fcs 0x5c credits 1
      0000: 41 54 2b 56 47 53 3d 30  33 0d                    AT+VGS=03.
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(d): cid 0x006b len 10 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a 
      0000: 0d 0a 4f 4b 0d 0a                                 ..OK..

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 15 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 10 fcs 0x5c credits 1
      0000: 41 54 2b 56 47 53 3d 30  37 0d                    AT+VGS=07.
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(d): cid 0x006b len 10 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a 
      0000: 0d 0a 4f 4b 0d 0a                                 ..OK..

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 15 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 10 fcs 0x5c credits 1
      0000: 41 54 2b 56 47 53 3d 31  31 0d                    AT+VGS=11.
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(d): cid 0x006b len 10 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a 
      0000: 0d 0a 4f 4b 0d 0a                                 ..OK..

0000: 01 2b 00 01 00 .+...

0000: 00 2b 00 02 00 08 .+....
< ACL data: handle 43 flags 0x02 dlen 18

    L2CAP(d): cid 0x006b len 14 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 10 fcs 0x9a 
      0000: 41 54 2b 56 47 53 3d 31  31 0d                    AT+VGS=11.

< HCI Command: Disconnect (0x01|0x0006) plen 3
handle 46 reason 0x13
Reason: Remote User Terminated Connection

0000: 00 01 06 04 ....

0000: 01 2b 00 01 00 .+...

0000: 00 2e 00 16 ....
< HCI Command: Add SCO Connection (0x01|0x0007) plen 4
handle 43 ptype 0x00e0
Packet type: HV1 HV2 HV3

0000: 00 01 07 04 ....

0000: 00 29 00 76 41 95 a4 07 00 00 01 .).vA......

    L2CAP(d): cid 0x0041 len 15 [psm 3]
      RFCOMM(d): UIH: cr 0 dlci 2 pf 1 ilen 10 fcs 0x5c credits 2
      0000: 41 54 2b 56 47 53 3d 31  31 0d                    AT+VGS=11.
< ACL data: handle 43 flags 0x02 dlen 14
    L2CAP(d): cid 0x006b len 10 [psm 3]
      RFCOMM(d): UIH: cr 1 dlci 2 pf 0 ilen 6 fcs 0x9a 
      0000: 0d 0a 4f 4b 0d 0a                                 ..OK..

0000: 01 2b 00 01 00 .+...
< HCI Command: Disconnect (0x01|0x0006) plen 3
handle 41 reason 0x13
Reason: Remote User Terminated Connection

0000: 00 01 06 04 ....

0000: 00 29 00 16 .)..

0000: 00 2b 00 00 00 00 .+....

    L2CAP(d): cid 0x0041 len 4 [psm 3]
      RFCOMM(s): DISC: cr 0 dlci 2 pf 1 ilen 0 fcs 0xd9 
< ACL data: handle 43 flags 0x02 dlen 8
    L2CAP(d): cid 0x006b len 4 [psm 3]
      RFCOMM(s): UA: cr 0 dlci 2 pf 1 ilen 0 fcs 0xf3 
< ACL data: handle 43 flags 0x02 dlen 8
    L2CAP(d): cid 0x006b len 4 [psm 3]
      RFCOMM(s): DISC: cr 1 dlci 0 pf 1 ilen 0 fcs 0xfd 
< ACL data: handle 43 flags 0x02 dlen 12
    L2CAP(s): Disconn req: dcid 0x006b scid 0x0041

0000: 01 2b 00 01 00 .+...

0000: 01 2b 00 01 00 .+...

0000: 01 2b 00 01 00 .+...

    L2CAP(d): cid 0x0041 len 4 [psm 3]
      RFCOMM(s): UA: cr 1 dlci 0 pf 1 ilen 0 fcs 0xd7 

    L2CAP(s): Disconn rsp: dcid 0x006b scid 0x0041

< HCI Command: Disconnect (0x01|0x0006) plen 3
handle 43 reason 0x13
Reason: Remote User Terminated Connection

0000: 00 01 06 04 ....

0000: 00 2b 00 16 .+..

--

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Phew, got it finally,

it was the bloody ehci_hcd audio problem others have come across:
http://sourceforge.net/mailarchive/message.php?msg_id=11431438

Using ohci_hcd, btsco works a treat in recording and playing, thanks for the good work !!!

PS: Should others have trouble using the BT110, keep in mind it has very stringent power saving and thus will turn off very soon after the last audio packets have been transmitted (the confimation tone will notify you of that) - btsco will then quit with "RFCOMM channel lost"...

Regards,
Lars

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ok, clearly i'll have to document this.

i've noticed that if the usb bluetooth adapter is connected directly to the machine it gets ohci. if it's connected to a 2.0 hub going to the machine it gets ehci.

btw, it dilutes the value of having two lists when you crosspost. -devel is where btsco discussion fits best.

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Lars

I hate to say it but it looks like you're doing everything right, the adapter seems to be good, etc.

I haven't heard success stories for using the bt110 but I can't remember if we've had trouble reports on this one or not.

The only thing I would suggest is that you don't specify the channel here, but I suspect btsco will autodetect channel 2 anyway.

Brad

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Hello,

I now tried compiling snd_bt_sco for 2.6.11.6 and everything works great.

I am using btsco 00:07:A4:0A:3F:XX or btsco 00:07:A4:0A:3F:XX 2 and both works.

I have headset Jabra BT250.
Dongle is d-link DBT-120 with 1.2 firmware.

This sents sound from headset mic to soundcard:
"cat </dev/dsp1 >/dev/dsp0".
Simultaneously I start xmms, setup out to BT headset alsa device, and mp3 plays in my headset. Sound from headset microphone goes to my normal audio set.

I have few questions:

Audio is heavily delayed (about 300-400ms)
What is the reason for this delay?

Sound from microphone is noised. For speaking is enough, but quality is not much good. Is it normal?

Best regards,

Pavel Ruzicka

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Dear Pavel Ruzicka,

I am also involved in testing the BT Headset functionality with the PC. I am using a CSR based USB BT Dongle on the PC and the BT Mono Headset is the RFMD Headset kit.

I have taken the latest CVS "btsco" files and compiled. Fedora 3(linux kernel 2.6.9-1.667) runs on my host PC. I have taken the latest Bluez libraries and utilities from the bluez site.

After running the "btsco" I am able to run the xmms and play songs and test for the speaker functionality separately. But I am not able to test the Sound recorder functionality. The SCO connection is opened only when I press "play" for the xmms and it closes when I stop the song. Whether I can test the mic functionality separately.

But my target application is a chat application with the usage of Speaker and mic working simultaneosly.

Please advice of the setting I need to make.

Thanks & Regards,
Benny

r

audio

ot

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Hello,

you can try latest kernel 2.6.11.x
This works for me.

For me is SCO connection opened from xmms or from mic "cat </dev/dsp1 >/dev/dsp0".
Both works simultaneously.

I don't know what other I can tell you. For me it's working.

Best regards,

Pavel Ruzicka

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