An auxiliary-in connector (also known as a line-in connector) allows you to connect a 3.5mm male/male cable directly from the headphone jack of your media player to your car, The sound quality isn’t quite as good as using a device-specific connector, but you might never notice. Be sure to turn the volume up on your media player.
I have terrible sound quality when using an aux-in port Aux-in ports aren’t ideal for sound quality. Your device’s headphone jack is designed to be used for headphones, not for connecting to other stereo equipment. Therefore, the sound quality will never be as good as when using a device-specific connector. However, there are a few ways to improve the sound quality:
● Increase the volume on your device. Typically, I turn the volume all the way up.
● Decrease the volume on your device. I know I just told you to increase the volume, and most devices and audio files work well with the volume turned all the way up. If you hear popping or crackling, however, try turning the volume down until the distortion disappears.
● Use your stereo to control the volume. After you get your device’s volume set to a point where it’s as high as possible without crackling, don’t touch the volume. Instead, use the volume controls on your stereo.
● Re-encode the file with a higher volume. Some audio files are simply quiet. If you play one through your headphone jack, you’ll have to turn your stereo’s volume up very high to hear it, and increasing the volume will increase the prominence of any static in the connection. If some parts of the audio are loud and some are quiet, re-encode the file using dynamic range compression (DRC). If all of the audio is quiet, re-encode the file and increase the audio gain. For video files, you can use the free HandBrake desktop app, available at http://handbrake.fr/. Within Handbrake, select the Audio tab, click Advanced, and then specify the Audio Gain and Dynamic Range before re-encoding the file. For audio files, use the free Audacity app, available at http://audacity.sourceforge.net/. Increase the gain and then save the audio file.
● Wiggle the connectors around. Sometimes headphone jacks and aux-in ports get loose. If that happens, you might get crackling sounds when the connector makes or loses contact. To determine whether that’s the problem, try wiggling the connector around. If it crackles, your connector is too loose. You could try using a new cable. If that doesn’t solve the problem, you might need to replace headphone jack or aux-in port, which will require a soldering iron and some patience.
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