QuickTime, which is used by HyperRESEARCH and HyperTRANSCRIBE for media playback, doesn't play Windows Media (WMA or WMV) natively (a free WMA/WMV add-on is available for OS X - see below). If you have files in these formats, there are several ways for you to proceed:
If you have not already made sound recordings in WMA format, check whether your digital recorder allows you a choice of formats.
If you're using Mac OS X, there is a free QuickTime add-on called Flip4Mac that will let QuickTime play WMA and WMV files. (This add-on isn't available for Windows.) The download is available from Microsoft. Once you've downloaded Flip4Mac and installed it, all Quicktime-enabled applications will be able to use WMV and WMA - including HyperTRANSCRIBE and HyperRESEARCH.
If you already have recordings in WMA or WMV format, and you cannot use the Flip4Mac add-on, you can convert the files to another format that's compatible. There are many free or low-cost conversion programs available for both Mac OS X and Windows; you can find them by searching the web for phrases like "convert WMV files to MP3 on Windows".