•To change the line-in level, select Settings→ZonePlayer Settings. Select the ZonePlayer this source is connected to, and then touch Line-In Source Level. Select a new level.
Using a Sonos Controller for Mac or PC:
•To play music from this line-in source, select the Line-Intab from the Music Library, select the source, and click Play Now.
•To change the settings for this device, select the Line-Intab from the Music Library, select the source, and click Setup. Select the Line-Intab to make changes.
A default (typical) line-in level is automatically assigned when you select a source name, but if the volume sounds too low, you can select a higher line level for this device. (You may experience sound distortion at higher volume levels if you set the level too high.)
For additional information on connecting audio devices, you can go to our Web site at http://faq.sonos.com/cables.