Select decoding mode.:
The new version has been added options to choose "Internal Decoder" and "Directshow" mode.After added the files and selected output path, Please press the option button and switch to "Internal Decoder mode" , see the following file.

When switch "Internal Decoder mode" successfully, press "Play" button to preview and test the sound, if ok, press "Go" button to begin the conversion.

(Note: If you want to convert MKV, Internal Decoder mode will ignore MKV subtitles stream , The subtitle stream will be retained in DirectShow mode only. )

If you always wanted to use DirectShow mode, a simple method to be installed K-Lite Codec Pack for having a a proper audio codec on your operation system , you can download from the following address:
Http://www.movkit.com/downloads/klmcodec138.exe

Press Option button to select decoding mode.

See also:
Choosing output format
Using format presets

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