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/