ClearOne chatattach 150 User Guide

Chapter 4: Using the Chat Application     23

Audio Settings displays the current audio settings and allows you to change them for the CHAt 150 currently 
connected to your PC. You can also create custom audio settings for a device (see Advanced Settings: Database later 
in this chapter for more information). 
the audio settings are as follows:

: these controls affect the audio settings of the CHAt 150 when it is connected via USB to your 

computer. Use the Mute buttons to mute either the microphone or speaker on the CHAt 150. Use the sliders to 
adjust the microphone level and speaker level. Speaker and microphone level adjustments made in the CHAt 
software will automatically change the speaker and microphone volume levels in windows.
Line Audio

: these controls affect the audio settings of the CHAt 150 when it is connected to devices through 

its I/O jack, such as handset telephones and video conferencing devices. these functions are unavailable if only 
the USB is connected and appear grayed-out. Use the input slider to adjust the level of the incoming audio to the 
speaker; use the output slider to adjust the level of the outgoing audio to the receiver side of the call.
Speaker

: these settings are only available when the vC Breakout Box is connected. the following options are 

available:

: USB audio and line in audio from the vC Breakout Box are mixed through the CHAt 150 speaker.

: Select this option to allow the audio from the far end of the video conference call to come 

through the tv speakers instead of the CHAt 150 speaker. Ensure that the CHAt 150 RCA connection 
cable (included with the CHAt 150 vC configuration) is properly connected (see the section Connecting 
CHAT 150 To A video Conferencing Device in this manual for detailed instructions). USB audio still comes 
through the CHAt 150 speaker in this mode.
External Speakers

: with this option selected, all audio (both USB and line in) is muted on the CHAt 150 and 

routed to the line out jack on the CHAt 150 vC Breakout Box, to which you can connect external speakers and/
or an amplifier. In this mode, you are using the CHAt 150 as a microphone device only.

: Click this box to mix the audio coming into the CHAt 150 through the USB connection with 

the audio coming through the I/O jack. for example, if this option is selected and you are talking to a colleague 
via Skype on your PC connected to your CHAt 150, and you also initiated a video conference call through the vC 
Breakout Box, all three parties would be joined together for a bridged call. the USB/Analog Mix setting is ignored 
while the Speaker option (see above) is set to video Mode or External Speakers.
Line Echo Cancellation

: Click this box to enable line echo cancellation. Line echo cancellation eliminates the 

echo caused when the CHAt 150 is connected to a telephone. On a telephone, audio is normally routed from the 
mouthpiece to the earpiece so that you can hear your own voice while talking, which causes feedback on a speaker 
phone.

WARNING:  Enabling  line  echo  cancellation  while  not  connected  to  a  telephone  may  cause  audio 
problems, so only use this option while connected to a telephone.

Any settings changes that you make on this screen are instantaneously applied to the CHAt 150. In addition, you have 
the option to click on Save to database to capture the current settings and save them as a custom device as described 
in the next section.