Thanks Clemens, for your reply. Is there any clarity or any further advantages compared to jack supported audio devices? USB supports more number of channels. One more question i would like to ask, is there any comply test for USB audio Class device. Thanks & Regards, Swarna. On Fri, Jan 15, 2010 at 3:59 PM, Clemens Ladisch <clemens@xxxxxxxxxx> wrote: > swarna jakka wrote: > > what is the main purpose and Advantages of USB Audio class over audio > line ( > > jack supported speakers). > > Jack-supported speakers can also be connected to USB devices that > implement the USB Audio class specification, and there are USB speakers > that also have analog inputs, so your question is somewhat meaningless. > > If you want to compare analog speakers with USB speakers, the main > difference is that analog speakers require the computer to have analog > output jacks, while USB speakers can be connected to any computer with > a free USB port. This allows upgrading (with more outputs and/or better > quality) the existing sound output, if any, especially on laptops where > adding a sound card is not possible. > > USB speakers have the disadvantage that they work only with a computer. > > Why are you asking this question? > > > Regards, > Clemens > ****************** > > WDMAUDIODEV addresses: > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > URL to WDMAUDIODEV page: > http://www.wdmaudiodev.com/ > >