How can i change the volume of an mp3 in android?

Asked Aug 02 '14 at 16:21

Active Aug 02 '14 at 17:32

Viewed 450 times

There are tools to increase the volume of mp3's. Is this possible to do in java on android devices?

I could not find much information about this on the web.

If it is not possible to write it in java directly, would it be possible to create a C program on the system level that does the mp3 processing and can be called from an android application?

edited Aug 02 '14 at 17:32

asked Aug 02 '14 at 16:21

Luke

1,768
2
20
30

http://stackoverflow.com/questions/5215459/android-mediaplayer-setvolume-function – Deepanshu J bedi Aug 02 '14 at 16:34
1

I am sorry. The question in the link you gave is about changing the device volume. I want to to change the mp3 file. – Luke Aug 02 '14 at 16:41
you mean the bitrate? – Deepanshu J bedi Aug 02 '14 at 16:42
No, the volume. Of the sound encoded in the file. – Chris Stratton Aug 02 '14 at 16:45
@ChrisStratton: correct – Luke Aug 02 '14 at 16:50
This is simply data processing - it is possible in *either* Java or in a C library invoked through jni. – Chris Stratton Aug 02 '14 at 17:38
But is there a library for java (which i can use with android/dalvik) which makes that easy? – Luke Aug 02 '14 at 17:47
You can't change mp3 volume without: 1) decoding the data to PCM 2) multiplying each sample by some value <1 3) re-encoding the samples back to mp3. I hope your question was really about something different than this! And there is a library that would help you - ffmpeg, any compilation for Android will do this. – ssuukk Aug 04 '15 at 08:08

How can i change the volume of an mp3 in android?

0 Answers0