Speed and Sound car Free app

Keep your eyes on the road, not your phone! Speed of Sound automatically adjusts your music player's volume while you're driving about with your GPS, lowering the volume while driving slowly or at a stoplight, and cranking it up on the highway.Warning: This is heavy on the battery! Please use a car charger.
This is a feature available in some more expensive cars and sound systems. We're giving it to you for free to use on your phone. Just start up your music player, plug your phone into your car stereo, and open Speed of Sound.
When you're done with your drive, you can take a look at a map of what songs you listened to and where. Don't worry about tagging that one song-you-can't-remember-the-name-of, just check the map afterwards.
• Customizable volume levels and speeds
• Map of songs you listened to on your drive, compatible with Google Music, HTC/Samsung music players, WinAmp, and any player that supports Last.fm scrobbling
• Smooth volume adjustment
• Smart speed filter that avoids random GPS jumps
• Options to auto-activate when plugged into headphones, charger, and Bluetooth
While this app is great to use while driving, it's designed to keep your eyes on the road and not your phone/radio. So don't mess with this app or your phone at all while driving.
This is a beta release, so expect a few minor issues. That said, we'd love to hear your feedback. Submit an issue on GitHub, or send us an email with your thoughts.
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• Can I use this with my car radio?
That's what it's for -- as long as you have an aux input and a decent cable to plug into your phone and radio, you're all set. If you don't have that, this won't be of much use unless you want to listen to music on your phone's awful speaker.
• What are some recommended settings?
The defaults that come with the application have been tested in the wild and have shown to work well. That said, everyone's tastes are different. We recommend choosing a slow and fast speed that aren't too far apart, because the effect is greater than you might think. Also, many phones get really quiet below a volume of 60, so pick volumes that are not too far apart.
• This drains my battery!
Yes, yes it does. Plug your phone into a charger while you drive.
• Why does my phone seem to "jump" between volume levels?
Unfortunately, this behavior shows up on many phones. We do our best to make volume changes smooth, but a lot of phones will only change the volume in increments of 5% or so. Not a whole lot we can do here, sorry.
• Where's the source?
The code is available under the GPLv2 on GitHub: https://github.com/jpeddicord/speedofsound
Feel free to fork, file bugs, or stare in awe.
• Position & GPS - We sorta need this to know how fast you're going.
• Bluetooth - Used to auto-activate when you connect to a Bluetooth music player.
• Internet, Accounts, Network, External storage - All for Google Maps alone.

Click here to download Free
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