Bluetooth audio has to have a transmitter and receiver. They can be built in or in a separate "converter". There are bluetooth "converters" that can be either a receiver or transmitter as needed.
A transmitter would be something that gives off the initial Bluetooth signal. No other connections needed. A converter would take the type of signal or port and “change” it to Bluetooth. They both do ok, but I prefer no in between connections.
Bluetooth audio has to have a transmitter and receiver. They can be built in or in a separate "converter". There are bluetooth "converters" that can be either a receiver or transmitter as needed.