The U.S. Library of Congress has opened the National Jukebox, a Web site that offers Flash-based streaming access to over 10,000 78 rpm discs issued by the Victor Talking Machine Company between 1900 and 1925. (The discs have been made available thanks to blanket permission from the rights-holder, Sony Music.) Thousands more are slated to be added soon. This is one of the great promises of the Internet, though it’s worth noting that these recordings can’t be downloaded because sound recordings published before 1972 are subject to state and/or common law protection, not Federal copyright law, and thus won’t fully enter the public domain until 2067.follow link
View Extra Audio Details in Snow Leopard
In Snow Leopard, Option-clicking the Volume icon in the menu bar displays a list of sound input and output devices. Choose one to switch to it; it's much easier than using the Sound preference pane. Also, hold Shift and click the icon to set the system volume, which is separate from the general output volume.
Library of Congress National Jukebox Unveiled