I can hear the skepticism already: "Effectively upsample my CD collection? Really??" Ordinarily, it would be true merely increasing the bit depth and sampling rate alone does nothing to improve sound quality. It does nothing but add a bunch of trailing zeros. However, using the ffmpeg aexciter audio filter, this front end program fills in those zeros with actual numbers. The aexciter filter, like other harmonic exciter hardware and software creates additional harmonics and overtones. (See...