I imported a WMF (Windows Metafile) as an image, intending to export it as a PDF. The original font is NWCV15, a music font used by Noteworthy Composer software. As you see, the wrong font appears in the image. The right font is accessible, as the second image shows. DrawPlus X6 doesn't have this problem (except for slurs/ties, which don't appear at all).