Most of our new music and sound effects are now being made available in High
Definition, 24-bit sound files. However, most of our back catalog is still only
available in regular CD-quality (16-bit, 44.1-khz).
You'll get more search results by including both HD/24-bit files and regular
CD-quality files in your search. But if you're working on something that really
needs 24-bit audio fidelity, you may want to limit your search to only 24-bit
/ HD files.
A purchase of 24-bit/HD file also includes a file that is downgraded
to regular CD-quality / 16-bit, 44.1-khz.
If you want to learn more about our High Definition 24-bit royalty free music
and royalty free sound effect files, please see this