Speed of Sound
Free App
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About Speed of Sound
Warning: This is heavy on the battery! Please use a car charger.
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. 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.
Features
• 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, selected Bluetooth devices, and when the app starts
• Tasker integration as an action
Disclaimer
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.
Feedback
We'd love to hear your feedback. Submit an issue on GitHub, or send us an email with your thoughts.
Help Translate
Want to translate Speed of Sound into another language? Check us out on Transifex:
https://www.transifex.com/projects/p/speedofsound/
FAQ
• 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.
Permissions
• 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.
Feature banner photo CC-BY davebloggs007: https://flic.kr/p/fdhBPP
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. 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.
Features
• 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, selected Bluetooth devices, and when the app starts
• Tasker integration as an action
Disclaimer
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.
Feedback
We'd love to hear your feedback. Submit an issue on GitHub, or send us an email with your thoughts.
Help Translate
Want to translate Speed of Sound into another language? Check us out on Transifex:
https://www.transifex.com/projects/p/speedofsound/
FAQ
• 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.
Permissions
• 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.
Feature banner photo CC-BY davebloggs007: https://flic.kr/p/fdhBPP
All Application Badges
Free
downl.
downl.
Android
4.0.3+
4.0.3+
Bug
buster
buster
Android app
App History & Updates
What's Changed
1.1.4: Fix a crash with some automatic start options.
1.1.3: Fixes issues with volumes not updating due to location inaccuracies. Now also uses linear volume scale, meaning things won't suddenly get very loud when going fast. ????
1.1.4: Fix a crash with some automatic start options.
1.1.3: Fixes issues with volumes not updating due to location inaccuracies. Now also uses linear volume scale, meaning things won't suddenly get very loud when going fast. ????
Version update Speed of Sound was updated to version 1.1.4
Version update Speed of Sound was updated to version 1.0.0
More downloads Speed of Sound reached 10 000 - 50 000 downloads
More downloads Speed of Sound reached 5 000 - 10 000 downloads
What are users saying about Speed of Sound
K
by K####:
by K####:
Brilliant app, works perfectly for me on Bluetooth. It takes some tweaking of the upper and lower speeds and volumes, but I'm glad the options are there for fine-tuning.
M
by M####:
by M####:
Developer not answering
K
by K####:
by K####:
Thank you for the great app. Simply functional! Highly recommended.
K
by K####:
by K####:
Works exactly as i had hoped.
K
by K####:
by K####:
Great app that automatically adjusts volume based on speed.
N
by N####:
by N####:
Works pretty well, but it would be great if we could set the increments that the volume changes, rather than it being linear. The minimum volume while you're barely moving is too loud when you're totally stopped, and if you adjust it the other way you can't hear anything until you're at whatever speed equates to 75% of the maximum. More granular controls in the next version, please!
N
by N####:
by N####:
Great for motorcycles. Glad to see updates.
N
by N####:
by N####:
After the Mar 6, 2016 update (allowing us to pick specific Bluetooth devices for activation) this app has become truly useful. It works exactly as expected.
R
by R####:
by R####:
Works great. The only issue which is not really a problem with the application but a limitation of Android is that volume increases in big steps, instead of gradually. To work around this, if you're phone is rooted, install xposed module VolumeSteps+ and set volume for music to 50.
N
by N####:
by N####:
Great app that automatically adjusts volume based on speed.
N
by N####:
by N####:
Great idea
D
by D####:
by D####:
If you could specify when it activates according to the bluetooth device it is connected, it would be a 5 star app. The plug in is a great idea, but it tends to close when launched via tasker. I'm running Marshmallow, so it may work on older versions of android.
D
by D####:
by D####:
Great app.
E
by E####:
by E####:
The app needs a persistent service. It disables itself anytime my phone sleeps or when it isn't in the foreground. And even sometimes when it's in the fg, screen on, and charging. I'm thinking the auto off function hasn't been fully explained? I'll be happy with a locale plug-in and a consistent user experience.
D
by D####:
by D####:
And thank you for keeping it free. :)
D
by D####:
by D####:
I listen to music and podcasts everyday while driving and this app saves me from constantly adjusting my volume while traveling at different speeds. With a little tweaking, the app is nearly flawless!
D
by D####:
by D####:
Great app that automatically adjusts sound of audio based on speed.
X
by X####:
by X####:
5 stars for adding a Tasker plugin. I use it when I turn on my driving mode profile.
D
by D####:
by D####:
I still wish I could set the speed-volume zones manually but the increase of max speed made the volume more consistent in my case. I don't have to set volume louder at 100 km/h so that it's loud enough at 140. It works great using automateit pro so I just have to turn on music and the rest works magically without any more setting up.
D
by D####:
by D####:
The app needs a persistent service. It disables itself anytime my phone sleeps or when it isn't in the foreground. And even sometimes when it's in the fg, screen on, and charging. I'm thinking the auto off function hasn't been fully explained? I'll be happy with a locale plug-in and a consistent user experience.
Y
by Y####:
by Y####:
I travel to Sunnyvale, CA for my work so there is plenty of stop and go traffic along the way where a song doesn't need to be as loud as it was at 70mph. The problem is that this app doesn't seem to work well when it's not running in the foreground. Often I found that while it's resting on the dashboard mount that's out in the open for all satellites to reach it, I'd go to the app and see it's waiting for gps signal... and waiting.. and waiting.. Ended up uninstalling until it. I'll try again if I seen it gets updated. T-mobile HTC One, 4.3
Y
by Y####:
by Y####:
I still wish I could set the speed-volume zones manually but the increase of max speed made the volume more consistent in my case. I don't have to set volume louder at 100 km/h so that it's loud enough at 140. It works great using automateit pro so I just have to turn on music and the rest works magically without any more setting up.
F
by F####:
by F####:
If you could specify when it activates according to the bluetooth device it is connected, it would be a 5 star app.
Y
by Y####:
by Y####:
Music Volume gets louder when I slow down. It also causes my music to skip.
Y
by Y####:
by Y####:
Just wish it had an auto start setting 4 when app 1st starts.
Z
by Z####:
by Z####:
U r. Ghyuyyyretfetf
W
by W####:
by W####:
Too heavy on the battery.
B
by B####:
by B####:
I use this app when listening to music on my motorcycle. Works perfect. Only thing it needs is to enable on Bluetooth
Y
by Y####:
by Y####:
Absolutely genius application! Works perfectly and the settings are simple and intuitive. Thanks dev.! Especially for free?!
Y
by Y####:
by Y####:
THIS APP IS OFF THE HOOK YO. EVER SINCE I GOT THIS APP, ALL THE B*TCHEZ IS LIKE "YO DAWG, CAN I RIDE IN YO CAR SINCE YOU HAZ THAT SWEET APP?!?!" AND I'M ALL LIKE "GOOBY PLS"
Y
by Y####:
by Y####:
A lot of Ford cars do this built in, but since I went from Ford to Nissan, I've missed this feature. So glad to have it back, especially for free! The only feature I'd want to add is music control gestures; like a tap to pause, and swipes to go forward/backwards. That way, I'd never have to even look at my phone to find the button to change the song when driving.
Y
by Y####:
by Y####:
Stable and simple. Auto start is a great feature. Does the job others couldn't!
Y
by Y####:
by Y####:
Nice
Y
by Y####:
by Y####:
:-)
N
by N####:
by N####:
I travel to Sunnyvale, CA for my work so there is plenty of stop and go traffic along the way where a song doesn't need to be as loud as it was at 70mph. The problem is that this app doesn't seem to work well when not in the foreground. Often I have to unlock my phone, go to the app, and I see it waiting for gps signal... Very annoying. Uninstalled it for manual control until I see an update then I'll try again. T-mobile HTC One, 4.3
N
by N####:
by N####:
I still wish I could set the speed-volume zones manually but the increase of max speed made the volume more consistent in my case. I don't have to set volume louder at 100 km/h so that it's loud enough at 140. It works great using automateit pro so I just have to turn on music and the rest works magically without any more setting up.
M
by M####:
by M####:
If you could specify when it activates according to the bluetooth device it is connected, it would be a 5 star app.
N
by N####:
by N####:
Music Volume gets louder when I slow down. It also causes my music to skip.
N
by N####:
by N####:
Just wish it had an auto start setting 4 when app 1st starts.
by B####:
How about support for JBL Charge 3? It is not shown in list of available devices, so it can't be selected. Because I would rather this app not affect another BT device connecting to both at the same time. But like it otherwise.