Audio Options

From the Audio Options screen you can configure CoolTalk to work with your audio card(s). You should select the proper record and playback devices, and make sure that your speakers and microphone are connected properly.

CoolTalk automatically detects whether you have a full or half duplex audio card. Full duplex means that your card can send and receive audio simultaneously, half duplex cards can either send or receive, but cannot do both at the same time.

If you have a half duplex audio card, CoolTalk can automatically switch your card between sending and playback to approximate full duplex. To turn on automatic switching, select “Recording/Playback Autoswitch.”

When you are selecting audio devices, CoolTalk lists all of the configured audio cards on your system. If you have two half duplex audio cards, you can configure one as the record device and the other as the playback device, allowing full duplex operation.

You can also adjust the amount of amplification (or reduction) applied to audio recording and playback using the sliders.

Finally, you can select which audio codec you wish to use.  CoolTalk supports the GSM audio codec as well as VoxWare’s RT-24 codec.


This field tells you if the audio card you have selected is Full or Half Duplex.


Selecting this box enables users with half-duplex audio cards to toggle between automatic and manual switching for Record and Playback.


Select the audio card you wish to use to record your audio from this list.


Select the audio card from the list that you wish to use for audio playback.


This slider sets the amount of amplification that is applied to incoming audio.


This slider adjusts the level of amplification that is applied to your outgoing audio.