The DM Smart DSP mobile app allows you to setup the DM processors or the D-6.1200 DSP Matrix amplifier using your mobile device and a Bluetooth® connection to the AC-BT24.
First, confirm that the DSP product you are using the AC-BT24 with is running at least version 1.2.0 of the software and version 1.2.1 of the firmware. If your product is running older versions of the software and firmware the processor will not be able to communicate with the AC-BT24.
The way to confirm the software and firmware versions is to first connect the processor (via USB cable) to your computer running the DM Smart DSP software, open the software, log in and check the version by going to the Help drop down menu and selecting About.
If you need to update the software and firmware in your processor refer to the how to article here
Next, with your processor powered off, plug the AC-BT24 into the Option Port and then power on the processor or amplifier. About 5 or 6 seconds after your processor or amp is powered back on you should see the fast blinking yellow APP LED on the AC-BT24.
Download and install the DM Smart DSP mobile app from the Apple App Store or Google Play. Be sure the Bluetooth setting is enabled on your mobile device, open the app and you will be prompted to connect to the AC-BT24, select OK.
Then you will be prompted to log in to the processor by entering the default password of 1234
After login, the yellow APP LED on the AC-BT24 will blink slowly and in the app window you should see a bright green LED in the upper right corner, this indicates that you are in fact connected to the processor.
For information on pairing your mobile device for streaming audio to your DM processor or D-6.1200 DSP Matrix amplifier please see the how to article here