This is the main window of 123 Sound Recorder where you can see the recording buttons and the Status or your recording. You can also choose here the Recording Device , the Sound Source and the Output Format 

In the Formats and Filters Settings you can manage the format settings which let you select a specific configurations for each audio file format. You can also add filters and enable the Auto Gain Control 

Here is the Audio player which allows you to play the recorded files or other audio files. You can see here a typical audio player interface with playing buttons 

In the Audio Converter window you may ad an input audio file and select a, output format , as well as a series of format settings. A progress bar of the conversion process is being shown at the bottom of the window