You've finished a clean install. The matrix is racked, the AV receivers are dialed in, and every zone sounds great. Three weeks later your phone rings: "The living room music stopped."

Nothing is broken. A power blip rebooted the customer's router, DHCP handed the receiver a new IP address, and CasaTunes kept knocking on the old one. The fix takes two minutes, but only after a drive to the job site or a patient phone call to find the receiver's new address.

We built IP address recovery to remove that call.

What's new

CasaTunes now remembers each IP-controlled matrix and AV receiver by its MAC address, a hardware ID that stays the same when the IP address changes. The first time CasaTunes connects to a device successfully, it quietly records the MAC. If the device later shows up at a different address, CasaTunes finds it by MAC, reconnects, and saves the new address.

Setup doesn't change. You enter the IP address as you always have. Devices you've already installed pick up their MAC the next time a connection succeeds, so existing systems benefit without a re-install.

What it means for you

Fewer "the music stopped" calls. Router reboots, power outages, and lease changes are the everyday causes of address changes. CasaTunes now handles them without a service visit or a walkthrough over the phone.

Both device types are covered. Matrices that connect over IP, including drivers like BluStream and RIO that have no discovery of their own, get recovery automatically. So do IP-controlled AV receivers. Axium and RTI AD DSP matrices already re-find themselves through their own discovery, and that continues to work as before.

It catches changes quickly. CasaTunes refreshes its map of the network every 10 minutes, and again 30 seconds after the server starts. That startup pass matters: if the router rebooted while the CasaTunes server was off, the map is rebuilt right away. AV receivers only connect when there's a command to send, so CasaTunes checks the map just before each connection. The next time someone taps play, it already knows where the receiver is.

It's built to be careful. CasaTunes never guesses. It only switches to a new address when the MAC matches exactly and the device actually connects there. If another device grabs the old address, CasaTunes doesn't mistake it for your receiver. If the device is simply powered off, its saved settings are left alone until it comes back. If you edit an IP by hand while a recovery is happening, your edit wins.

You can see what's going on. When CasaTunes updates an address, it writes a line to the log. If an AV receiver fails to connect three times in a row, it appears in the Problem List as an offline device, so you spot it in your dashboard rather than from a customer's call.

Good to know

IP address recovery is a safety net, and a few limits are worth knowing:

• Same network only. The CasaTunes server and the device need to be on the same subnet. Devices on a separate VLAN or subnet aren't covered, and CasaTunes won't save a MAC for them.
• A DHCP reservation is still the best fix. Pinning the device to one address in the customer's router prevents address changes in the first place. Recovery is there for when that reservation is missing or gets lost.
• Switching from Wi-Fi to wired. If a device has separate Wi-Fi and Ethernet connections, each has its own MAC. After moving a receiver from one to the other, re-save its IP address so CasaTunes learns the new MAC.
• Manual IP changes reset the MAC. If you change a device's IP by hand, CasaTunes clears the old MAC and captures a fresh one, since the new address might belong to a different physical device.

The bottom line

A device's IP address was never the right way to identify it. The MAC address is. By tracking that, CasaTunes turns a common, frustrating failure into something that fixes itself, so you spend less time on the phone and more time on the next install.