I have changed my bluetooth dongle and it is based on CSR chip: [cuanyu@tom sbin]$ ./hciconfig hci0 version hci0: Type: USB BD Address: 00:02:72:02:02:E7 ACL MTU: 192:8 SCO MTU: 64:8 HCI Ver: 1.1 (0x1) HCI Rev: 0x20d LMP Ver: 1.1 (0x1) LMP Subver: 0x20d Manufacturer: Cambridge Silicon Radio (10) [cuanyu@tom sbin]$ ./hciconfig hci0 revision hci0: Type: USB BD Address: 00:02:72:02:02:E7 ACL MTU: 192:8 SCO MTU: 64:8 HCI 16.4 (bc02x) right now I can record very well and replay it by sox like this: [root@tom sbin]# sox -t raw -r 8000 -c 1 -w -s recorded -t ossdsp -w -s /dev/dsp But I still can't replay the recorded file. What I heard is just very sharp noise. I can't tell it is the original audio because I can still tell when the speaker stopped and when he started again. But it is just some noise. I am using the default 0x0060 voice setting. Here is the content of my usb devices: T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 4 B: Alloc=120/900 us (13%), #Int= 2, #Iso= 1 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 0.00 S: Product=USB OHCI Root Hub S: SerialNumber=cc87b000 C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=1.5 MxCh= 0 D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=05e3 ProdID=1205 Rev= 2.30 S: Product=USB Mouse C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 48mA I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=hid E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=10ms T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=e0(unk. ) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=0a12 ProdID=0001 Rev= 5.25 C:* #Ifs= 3 Cfg#= 1 Atr=c0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms I: If#= 2 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=00 Driver=(none) I am using the default kernel image of Fedora core 1 and all the USB Bluetooth option are selected as module. Here is the list of loaded module: ppp_mppe 13848 2 (autoclean) ppp_async 9472 1 (autoclean) ppp_generic 24612 3 (autoclean) [ppp_mppe ppp_async] slhc 6756 1 (autoclean) [ppp_generic] trident 33620 1 (autoclean) ac97_codec 17192 0 (autoclean) [trident] pcigame 2952 0 (autoclean) [trident] gameport 3380 0 (autoclean) [pcigame] soundcore 6468 2 (autoclean) [trident] parport_pc 19076 1 (autoclean) lp 9060 0 (autoclean) parport 37056 1 (autoclean) [parport_pc lp] autofs 13364 0 (autoclean) (unused) rfcomm 38016 0 (autoclean) l2cap 19948 2 (autoclean) [rfcomm] 3c574_cs 12612 1 ds 8680 1 [3c574_cs] yenta_socket 13664 1 pcmcia_core 57216 0 [3c574_cs ds yenta_socket] natsemi 19552 1 floppy 58012 0 (autoclean) sg 36492 0 (autoclean) sr_mod 18168 1 (autoclean) microcode 4700 0 (autoclean) ide-scsi 12208 0 scsi_mod 108168 3 [sg sr_mod ide-scsi] ide-cd 35776 0 cdrom 33728 0 [sr_mod ide-cd] ohci1394 29160 0 (unused) ieee1394 204676 0 [ohci1394] usbdfu 10220 0 (unused) hci_usb 9752 1 bluez 40324 3 [rfcomm l2cap hci_usb] keybdev 2976 0 (unused) hid 24708 0 (unused) usb-ohci 21512 0 (unused) usbcore 79168 1 [usbdfu hci_usb hid usb-ohci] thermal 8224 0 (unused) processor 10712 0 [thermal] fan 2496 0 (unused) button 3692 0 (unused) battery 7072 0 (unused) asus_acpi 9820 0 (unused) ac 2752 0 (unused) mousedev 5556 1 (autoclean) input 5888 0 (autoclean) [keybdev hid mousedev] ext3 71300 2 jbd 52084 2 [ext3] What else should I do for this? Liu Jie 在2004年05月18日的20:10，Marcel Holtmann写道： > Hi, > > > I am using Anycom's USB 220 and it is not based on CSR chip. Here is the device information of it on my computer: > > [root@tom sbin]# ./hciconfig hci0 version > > hci0: Type: USB > > BD Address: 00:0B:0D:21:9E:81 ACL MTU: 339:4 SCO MTU: 64:0 > > HCI Ver: 1.1 (0x1) HCI Rev: 0x93 LMP Ver: 1.1 (0x1) LMP Subver: 0x93 > > Manufacturer: Transilica, Inc. (24) > > [root@tom sbin]# ./hciconfig hci0 features > > hci0: Type: USB > > BD Address: 00:0B:0D:21:9E:81 ACL MTU: 339:4 SCO MTU: 64:0 > > Features: 0xff 0xff 0x3d 0x00 > > <3-slot packets> <5-slot packets> > > > > > > > > > > [root@tom sbin]# ./hciconfig hci0 revision > > hci0: Type: USB > > BD Address: 00:0B:0D:21:9E:81 ACL MTU: 339:4 SCO MTU: 64:0 > > Unsupported manufacturer > > > > Is there any other way I could figure out if the sco packets are routed through HCI or PCM interface? Can I trace it by hcidump? > > I don't have any detailed information about the Transilica chip. Run > "hcidump -x" as root and if you see SCO packets then this dongles routes > the SCO data over HCI, otherwise it goes over the PCM. > > And btw. do you activated the HCIUSB_SCO kernel option and do this > dongle really have the needed ISOC interface? You must check the content > of /proc/bus/usb/devices. > > Regards > > Marcel > >