Aurora Design
BTU-3.1 Bluetooth/USB
AAC/MP3/Ogg/FLAC Adapter
User Operation
Manual
Congratulations on your new Aurora Design BTU-3.1 Bluetooth/USB
adapter. Combined with an FMR-3 converted radio, you can enjoy 21
st
century technology in your classic vehicle!
Setup:
Your radio may have come equipped with an internal
microphone. If not, before installing your radio back into your vehicle,
you may wish to plug the hands-free microphone or optional illuminated
pushbutton into the appropriate jacks on the radio. The microphone can be
placed in a convenient location in the vehicle, typically along the front
edge of the headliner near the rear view mirror or along the bottom edge of
the dashboard. The attached cable is 9.8’ (3M) long and can be routed as
required, typically behind the A pillar cover for headliner mounting.
Excess cable can be coiled and tied off.
The optional pushbutton assembly is not required when used with an
FMR-3 converted radio as the existing radio controls can be used to fully
operate the BTU-3.1. The pushbutton assembly can still be used with an
FMR-3 converted radio if desired, and must be used with all other
installations. The pushbutton requires a 1/2” (12.7mm) hole and should be
mounted somewhere convenient such as the bottom edge of the dashboard.
The pushbutton is illuminated with a red status LED that should be made
visible for easiest operation. The attached cable is 3.3’ (1M) long and can
be routed as required. Excess cable can be coiled and tied off.
Basic Operation:
Operation of the BTU-3.1 is extremely simple yet
powerful. The BTU-3.1, when combined with an FMR-3 AM/FM receiver
form a fully integrated AM/FM/Bluetooth/USB AAC/MP3/OGG/FLAC
solution. Communication over a proprietary com-link keeps the two
modules in perfect sync. Full operation is provided by the existing controls
on the radio. When streaming music or handling a phone call, the FMR-3
status LED will change color to indicate Bluetooth/USB operation. (see
FMR-3 manual for more information on status LED) When you stop
streaming music or end a call, the BTU-3.1 will put the FMR-3 back into
normal operation. Everything is handled automatically.
The BTU-3.1 supports SBC and AAC formats over Bluetooth and AAC,
MP3, Ogg Vorbis and FLAC formats over USB. AAC files offer higher
quality than MP3 and is the native format used by iTunes® and many other
popular music services. AAC files will play natively off compatible Bluetooth
devices and can be copied directly onto USB drives for playback.
Since the BTU-3.1 contains both Bluetooth and USB interfaces, control
of the module, either through an FMR-3 or with the optional pushbutton/
seek-button, focuses on one interface at a time. Just as with a computer, the
application that currently has focus receives the inputs from the keyboard
and mouse, so do the Bluetooth and USB interfaces on the BTU-3.1. If only
one interface is active, for example Bluetooth connected and no USB drive
attached, the controls will affect the Bluetooth interface. Likewise if a USB
drive is attached and no Bluetooth device is connected, the controls will
affect the USB interface. In the case where both a Bluetooth device is
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