With the correct type of adapter you will be able to convert analog audio via Bluetooth to a digital signal. This is useful if you have a device such as an old tape player or vinyl deck, and want to transmit the audio from it to a Bluetooth speaker. The process is very simple, but it does require a Bluetooth analog audio adapter. Bluetooth typically works at a distance of up to 30 feet. You will need to be familiar with your send Bluetooth device for this to work.
Plug your Bluetooth analog audio adapter into the audio output of your analog device.
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Switch on the Bluetooth device that you wish to connect to.
Press the button on your analog audio adapter. This will start the adapter, and set the mode to discoverable.
Make your second device discoverable, and wait for the devices to pair. You will now have converted audio to Bluetooth.