www.enchantedage.com

Wavemix is a command line WAVE file mixer. It is somewhat intelligent about mixing
multiple channels and might even be able to re-sample various sample rates. The
source code is included (requires STK to build).

Usage: wavemix [/SR 44100] [/16] [/GAIN g] infile1.wav ... outfile.wav

Supports at most 19 input files and one output file.

On competent recordings of normal program material, with excellent equipment, nobody has shown that they can consistently tell the difference between redbook (regular CD audio, at 44.1 kHz sampling rate and 16 bit word depth) and higher-rate/wider audio formats.

One question that consumers often have relating to speakers, Hi-Fi and home theater systems, is "why are different systems rated for different amounts of watts, and why do watts matter anyway?"