In other words, what is the difference in the output signal of the device to the receive/output signal of the speaker when a sound is played via bluetooth and via an aux cord.
In: Engineering
Here is what happens when you play music over the AUX/headphone/audio jack
Digital File->Decoder->Audio Amplifier->Wire->Speakers.
First the digital file is read, and then the audio is decoded. Then the waveform from that decoded audio is generated, and it is sent over to the audio amplifier. The amplifier turns the tiny voltage into a much higher voltage (compared to itself, not dangerous high voltage) which it sends over the wire. The wire, obviously, transmits the changing voltage to the speakers. The speakers then react by moving, and recreating the sound.
Here is what happens when you play music over Bluetooth:
Digital File->Decoder->Bluetooth Transmitter->Radio Waves->Bluetooth Receiver->Audio Amplifier->Speakers
The digital file is read, then decoded, and then the waveform is generated. Then it is sent over to the bluetooth radio which encodes it again, and then sends that over the air. The receiver gets it, decodes it, and then sends it over to the amplifier. The amp boosts that waveform, then puts it into the speakers.
In theory, the cable should have better sound, as the data is not encoded to be sent over the wireless radio… However, in practice, most people don’t notice any difference. They just enjoy the wireless music. But some people are really sensitive to it, so they can’t stand BT at all.
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