You may use an Airplay®, iTunes, or any DLNA-enabled device that is connected to your extended network to play music to the speakers you connected to the DCH-M225.
For Apple Airplay:
a. Open iTunes (or the Airplay music app* on your iOS device)
b. Click the Airplay icon.
c. Select the DCH-M225 from the destination list.
d. Click Play and the music will stream to the extender.
For DLNA:
a. Download and install a DLNA music app*.
b. Verify that DLNA is enabled on your device.
c. Within the app, select the DCH-M225 from the “play to” or destination list.
d. Click Play and the music will stream to the extender.
* Refer to the documentation of the app for more information.