Posted by Gizmo Guy on January 09, 2017
o get the best sounding music for your car, you can choose from a wide variety of music resources. There are different ways to connect music player to your car stereo. Some of the common methods are auxiliary input, cassette adapter, USB input, FM transmitter and Bluetooth transmitter.
The FM Transmitter is a good idea in theory. The problem is, these things are very low power, as mandated by the FCC or your local equivalent. In the USA, the rule requires an ERP of 0.01 µW, or 10 nW, or -30dBm. So ok, you're only going a meter or so, so that signal at the car's antenna should be around -40dBm to -45dBm, depending on the actual distance. And a typical consumer FM receiver should be good to -90dB or so receive sensitivity. As far as bit rates, if you're not using very high quality speakers than once you go over a certain bit rate than you won't notice a difference in quality.
But keep in mind... you're more or less travelling in a partial Faraday Cage. Where's your antenna? Where's the FM transmitter? Chances are, the answer to the latter is "somewhere near a DC outlet". So if you have one of those in-windshield FM dipole antennas, you might have a pretty good signal, though the direct path to your antenna might be through your dashboard. But if your antenna is one of those shark fins on the roof, you have a 5-10 millimeters of steel between your transmitter and your receiver. So you're already sketchy. Then consider that in many areas, the FM band is pretty crowded. You may think you have a clear channel, and maybe you do. Or maybe there's a distant station coming in and out that you never expected. And being low-tech analog radio, it's not as if you get one or the other, you get both
There is a golden rule in audio which is "you audio quality is only as good as your worst component."
Simply connect the gizmo guy gadget into your Google Pixel Phone. Set the car radio preset to 87.9 Make sure the setting on the transmitter matches the setting on the radio. Adjust the volume of the Google Pixel phone to about 80 % and use the car radio to make tweek.
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