It's something we are reviewing. Controlling the SD card via BLE ( Bluetooth ) only allows for basic functionality which we already have in Gofigure. The other option is to use WiFi with either DLNA/UPnP or MPD. The original idea was to allow customers to use one of the apps already available that they might already be familiar with and to not restrict the use of Poly to a custom Chord app. This would give a greater flexibility. However we are looking at different options and for the long term future nothing is off the table as we continue to develop the Poly streaming platform.