There is no way to filter audio tracks yet, and they are detected as 'videos'. The Filter View drop-down menu in the top right corner of the interface, still only has options for Images, Videos, & Images and Videos. If you select a different audio track while another one was playing, the application automatically plays the newer selection. But it is very clear that FastStone Image Viewer is not intended to be used as a full-fledged audio player, because when you navigate to a different folder, or even select another file (image, video or audio), the current playback stops. I used to use an older version of ACDSee. To me that was the major deciding factor to go with XnView. FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. I don't think Faststone supports the IPTC format - or at least it didn't 6 months ago and browsing their site, I still don't see any referance. It's impressive how the program has evolved from being an image viewer, to one that can play videos and audio. When comparing XnView MP and IrfanView, you can also consider the following products. While the release notes don't mention it, FastStone Image Viewer supports FLAC, M4A audio formats too. You can also use it to pause, stop, rewind the playback or use it to jump to the previous or next track, and control the volume. The preview pane displays the selected visualization during the playback and also the information about the song such as the bit-rate, file size, date, name, etc.

Xnview mp vs faststone viewer