Audio Gateway Registry Settings (Compact 2013)

3/26/2014

Windows Embedded Compact provides the Audio Gateway service to support the Hands-Free Profile on the device. You can configure the Audio Gateway service through the registry.

Note

The default registry values vary depending on which catalog items are included in your OS design.

To enable the Hands-Free Profile on the device, add the HKEY_LOCAL_MACHINE\Software\Microsoft\Bluetooth\HandsfreeProfileOn key to the registry. This registry key is not added by default because not all devices support Bluetooth.

You can configure the Audio Gateway by using these registry entries, located in the key HKEY_LOCAL_MACHINE\Software\Microsoft\Bluetooth\AudioGateway.

Name	Type	Description	Default
Authenticate	REG_DWORD	Optional. Whether the connection is authenticated. 0 = Disables authentication. 1 = Enables authentication. Caution: Disabling authentication is a potential security risk.	1
ConnectHFOnCall	REG_DWORD	Specifies whether hands-freeoperation is activated when a call is received. 0 = Disables activation. 1 = Enables activation.	0
ConnectScoInAlways	REG_DWORD	Whether audio is routed to the Bluetooth hands-free device. 0 = Incoming calls answered in the handset and audio is not routed to the hands-free device. 1 = Incoming calls answered in the handset and routes audio to the hands-free device.	0
Encrypt	REG_DWORD	Optional. Whether the connection is encrypted. 0 = Disables encryption. 1 = Enables encryption. Caution: Disabling encryption is a potential security risk.	1
ESCOMaxLatency	REG_DWORD	Specifies an upper bound on the latency of the Extended Synchronous Connection Oriented (eSCO) data and sets bounds onthe maximum number of retransmissions and the eSCO interval.
ESCORetransmission	REG_DWORD	Specifies the number of retransmissions and the eSCO interval.
ESCORxBandwidth	REG_DWORD	Specifies the eSCO reception bandwidth.
ESCOTxBandwidt	REG_DWORD	Specifies the eSCO transmission bandwidth.
ESCOVoiceSetting	REG_DWORD	Specifies whether a voice channel on the device is activated. 0 = Disables the voice channel. 1 = Enables the voice channel.	0
MapAudioToPcmMode	REG_DWORD	Specifies the audio driver. 0 = Use the built-in SCO audio driver. 1 = Assume that audio is automatically routed to the Bluetooth hardware.	1
MicVolume	REG_DWORD	The default microphone volume with respect to the AT+VGM command.	8
NoHandsFree	REG_DWORD	Whether the Hands-Free Profile is used. 0 = Enables the Hands-Free Profile. 1 = Disables the Hands-Free Profile.
PowerSave	REG_DWORD	Configures the audio gateway to conserve power when the audio connection is not needed. 0 = Keeps the service level connection active for the Hands-Free Profile in between calls. 1 = Closes the service level connection between calls.
SpkVolume	REG_DWORD	The default speaker volume with respect to the AT+VGS command.	8
Capability	REG_DWORD	The capability bitmask that is specified by the Hands-Free profile. Optional bitmask values are: 0x04 = Enable voice tag support 0x08 = Enable in-band ringtone	0x21
PageTimeout	REG_DWORD	The page timeout for connecting to the peer Bluetooth device. This value is passed as a parameter to the BthWritePageTimeout function.
Extensions\1	REG_SZ	Name of the AT command extension DLL to load.	"DllName"="BTAGExt1.dll"
Extensions\2	REG_SZ	Name of the AT command extension DLL to load.	"DllName"="BTAGExt2.dll"
OutgoingCallOption	REG_DWORD	How outgoing calls should be handled. 0 = Prompts where the outgoing call should be handled. 1 = Automatically handles the call in the headset. 2 = Disables audio routing and automatically handles the call in the hands-free device.
SniffDelay	REG_DWORD	The timeout in milliseconds before activating the SNIFF mode for the connection.	5000
SniffMax	REG_DWORD	The maximum acceptable number of Baseband slots between each sniff period. The valid range is 0x0001 through 0xFFFF, which is equivalent to a time range of 0.625 milliseconds through 40.9 seconds.
SniffMin	REG_DWORD	The minimum acceptable number of Baseband slots between each sniff period. The valid range is 0x0001 through 0xFFFF, which is equivalent to a time range of 0.625 milliseconds through 40.9 seconds.
SniffAttempt	REG_DWORD	The number of Baseband receive slots for sniff attempt. The valid range is 0x0001 to 0x7FFF. The time is equal to (2 * N -1) * 0.625 msec. The valid time range is 0.625 milliseconds through 40.9 seconds.
SniffTimeout	REG_DWORD	The number of Baseband receive slots for sniff timeout. The valid range for N is 0x0000 to 0x7FFF. For values greater than 0, the time is equal to (2 * N -1) * 0.625 msec. If N is equal to 0, then the time is equal to 0 milliseconds. The valid time range is 0 through 40.9 seconds.
NoRoleSwitch	REG_DWORD	Whether the stack can request a role switch with the peer device. 0 = Enables role switching. 1 = Disables role switching.	1
UnattendedMode	REG_DWORD	Specifies whether the device allows applications to continue to run instead of pausing them when the screen is turned off. 0 = Applications do not continue to run unattended. 1 = Applications continue to run unattended.	0
UseESCO	REG_DWORD	Specifies whether to use eSCO audio. 0 = Disables ESCO audio. 1 = Enables ESCO audio.	0

You can enable the Audio Gateway Service by using this registry entry, located in the key HKEY_LOCAL_MACHINE\Services\BTAGSVC.

Name	Type	Description
IsEnabled	REG_DWORD	Determines whether the service is started at boot time. 0 = Service is not started at boot time. 1 = Service is started at boot time.

See Also

Reference

Bluetooth Registry Settings
Bluetooth Audio Gateway Service Reference