Audio in android app

Building a simple audio app in Android (Part 1/3)

MediaPlayer introduction

Introduction

Android Media APIs encompass a lot of advanced functionality that allow developers to create rich media experiences. They include things like ExoPlayer , MediaSession , audio focus, volume shaping, and lots of other amazing capabilities just around media playback and control.

The goal of this series of articles is to get you started with the Android MediaPlayer API by going thru the journey of creating a very basic audio playback application called “A Simple MediaPlayer” app. This is the first part of a 3 part series that includes:

Part 1/3 — MediaPlayer introduction

This article will cover the following:

• How the MediaPlayer works by considering some simple audio playback tasks and how they map to the MediaPlayer state machine.

Basic MediaPlayer tasks

Here are the basic tasks that MediaPlayer needs to handle:

• Load a media file for playback. This is done with the methods setDataSource() , prepare() , and prepareAsync() .
• Start playback / Play audio. This is handled by start() .
• Pause playback (once playback has started). This is handled by pause() .
• Stop playback and reset the MediaPlayer, so that you can load another media file into it. This is handled by reset() .
• Find the length of a song (in ms). This is handled by getDuration() .
• Find what part of the song is playing. This is handled by getCurrentPosition() .
• Jump to a specific time position (in ms) in the song and play from there. This is handled by seekTo(position) .
• Check to see if audio is being played back right now. This is handled by isPlaying() .
• Find out when a song is done playing. This is handled by attaching a MediaPlayer.OnCompletionListener . Your code will get an onCompletion() callback from the listener.
• Deallocate resources used by the player. This is handled by release() , which releases all the resources attached to the player. After being released the player is no longer usable.

This list covers the basic playback tasks for audio content, but it isn’t exhaustive. There are more complex functions for sophisticated audio apps such as streaming media, dealing with audio focus, volume shaping, and working with MediaSession . For more information on these advanced topics, please consult the MediaPlayer API guide.

Simplified state machine

Here is a simplified description of MediaPlayer’s state machine for audio playback:

First create an instance of MediaPlayer .

1. Then load the media file that you want into the player. This means using the setDataSource() method with a parameter that describes where the media file is coming from.
2. Now you need to prepare your data source. There are two ways of doing this:

• Use prepare() . This method will block the calling thread so should only be used for data sources which are stored locally on the device.
• Use prepareAsync() . This method will prepare the data source asynchronously and should be used for remote or large data sources. Using this method you get a callback when your media is ready for playback, and you can enable media playback controls in your app’s UI at this point. You can use the MediaPlayer.OnPreparedListener to get notified when the player has loaded the content for you to start playback. You can attach this listener to your player using setOnPreparedListener(listener) .

Now that your audio has been loaded, you can play and pause your audio. And you can stop and restart playback.

1. Play — use start() to tell the player to start playback. You can ask the player if it’s playing using isPlaying() .
2. Pause — you can pause only if isPlaying() is true so always check this before you call pause() .
3. Stop — use the reset() method to do this. It will stop playback and reset the player so that you can load other media files into it.
4. Seek — use the seekTo() method with a time offset to move audio playback to the desired position. This is needed when you allow the user to move playback to any position in the currently loaded media.

When you are done with the instance of MediaPlayer, be sure to release() it. Once released, you have to create a new MediaPlayer object and start from Step 1 in order to play another media file.

To get started with building the app, please checkout Part 2/3 of this series- Building the app.

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10 best audio recording apps for Android

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BandLab

Price: Free

BandLab is an above average audio recorder. It’s mostly for whole band or musician setups. It features a 12-track mixer, a bunch of audio samples, a looper, a guitar tuner, and, of course, the ability to record audio. It may be a little much for a single artist or simple voice recordings. However, those who want to give audio recording a real try and need multiple tracks have a decent option with this one. There is also a social media element that people seem to enjoy.

Dolby On

Price: Free

Dolby On is a shockingly good audio recording app. It’s useful for both voice and instruments. It not only does the basics like recording audio, but you can fiddle with it in a number of ways. The features include an EQ, spatial audio, noise reduction, de-essing, and even fade in and out effects. The thing is, it doesn’t take a lot of words to describe this app but it does a bunch of stuff. This was one of our picks for the best of 2020 despite being just an audio recorder. It’s that good. The app is also free as of the time of this writing.

Easy Voice Recorder

Price: Free / $3.99

Easy Voice Recorder is what the name says. This is mostly for simple voice recordings. You hit the button, it records some audio, and that’s it, basically. It works great for recording lectures, interviews, and other practical uses. It also exports to MP3 so it’s also decent for the occasional acoustic guitar recording or something similar. The app also supports Wear OS and includes a dark theme. The free version contains ads and the premium version does not. This is a good, simple audio recorder.

FL Studio Mobile

Price: $15.99 with in-app purchases

FL Studio Mobile is a lot like Caustic 3. It has a bunch of tools for electronic style music like electronica, techno, hip-hop, and similar music styles. That includes a bunch of effects, synths, and the ability to record live audio if needed. You can create, mix, master, etc. There are tools for all of that stuff. It also includes plugin support. The app started a little bit clunky, but has improved over time. The price tag is also a little bit steep. We definitely don’t recommend this one for simple recording tasks. The app goes for $15.99. The in-app purchases are for additional plugins and add-ons.

Hi-Q MP3 Voice Recorder

Price: Free / $3.49

Hi-Q is an above average voice recorder. It’s mostly for business and academic use such as meetings, interviews, notes, lectures, and things like that. It supports MP3 and that makes it decent for the occasional guitar song or musical idea as well. The app also features Dropbox support, widgets, and a WiFi transfer function. The quality is also pretty decent, although a lot of that depends on your device’s microphone as well. There is a free and premium version. The premium version has all of the extra features.

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15 Best Audio Editing Apps For Android in 2021

Best Audio Editors for Android!

Android is definitely the best mobile operating system out there. Millions of users right now use the mobile operating system. Android is always known for its massive app ecosystem. Just take a brief look at the Google Play Store; you will find apps for every different purpose over there.

If we talk particularly about music on Android, the Google Play Store has lots of offerings. In fact, on Techviral, we have already shared lots of articles on Android music, like best music player apps, music streaming apps, etc.

List of 15 Best Audio Editing Apps For Android

Today, we will be talking about the best music editing apps for Android. With audio editing apps, you can edit music files on your Android. So, let’s check out the list of best audio editing apps for Android.

1. MP3 Cutter

As the name of the app says, the MP3 cutter is an application that lets you cut parts of MP3. However, apart from cutting MP3 files, it also offers many basic audio editing features.

It supports almost all major audio formats. Additionally, you can use it to merge clips, remove specific parts from audio, change the file size, silence audio, and more.

2. Media Converter

With this app, you can edit your media files according to your wish. Media Converter allows you to convert all kinds of media formats to popular media formats: mp3, mp4 mpeg4, aac, Ogg, Avi (mpeg4, mp3), MPEG (mpeg1, mp2), Flv (Flv, mp3), and WAV.

Also, audio profiles: m4a (aac-audio only), 3ga (aac-audio only), OGA (FLAC-audio only) are available for convenience.

3. Super Sound

It’s one of the best and most powerful audio editing app that you can ever use on Android. From audio editing to mixing, Super Sound does it all.

Some of the key features of Super Sound include audio editing, multitrack editing, audio trimmer, audio converter, volume control, etc. The app is completely free to use, but it’s ad-supported.

4. WavePad Audio Editor Free

With this app, you can record, edit, and add sound effects to any audio file. It’s a full-fledged audio editing app that can be used to cut, copy, paste, insert, merge any audio clips.

The only drawback of the app is its interface. The user-interface looks outdated and it’s bloated with few unnecessary features.

6. Lexis Audio Editor

With Lexis Audio Editor, you can create new audio records or edit audio files with the editor. Save the files in the desired audio format.

The trial version has all the paid version features, including saving in WAV, M4A, AAC, FLAC, and WMA format. You need to purchase the paid version to save audio files in MP3 format.

7. Walk Band – Multitrack Music

It is a music studio (a toolkit of virtual musical instruments) suite for Android. It contains tons of features including Piano, Guitar, Drum Kit, Drum Machine, Bass, Multi-tracks synthesizer, etc.

All instruments use realistic instrument sounds. You can add the drum beats and guitar chords to your piano melody.

10. Timbre

Well, Timbre is an app for editing audio and video files. It allows you to edit, cut, join, and convert your media files.

With Timbre, you can change Audio Bitrate, remove audio from a video, convert video to audio format, change audio speed, etc. It is completely free and has no ads.

11. MixPad Music Mixer Free

If you are searching for an Android app to mix your audio and music files, then you need to give MixPad Multitrack Mixer a try. The app offers lots of professional audio recording and mixing features to edit audios on the go.

Although the app has many advanced features, it’s mostly used to create music, record a podcast, mix songs, etc. Users who do not know about audio editing might find the app complicated to use.

12. edjing Mix

According to the play store listing, edjing Mix has been designed in partnership with pro DJs. We don’t know how true is that, but it offers lots of powerful DJ tools.

The great thing about the app is that it provides you access to millions of tracks that you can use to remix some party music. The app has an intuitive interface that gives you direct and quick access to all necessary features.

14. FL Studio Mobile

With FL Studio Mobile you can create and save complete multi-track music projects on your Android phone or tablet. This is an audio editing tool that comes with lots of exciting features like you can record, sequence, edit, mix, and render complete songs.

However, this is not a free tool. You need to spend around $5 to purchase the app from the Google Play Store.

15. Recording Studio Lite

It is a multitouch sequencer for Android devices. Recording Studio makes recording, editing, and mixing a breeze.

The app’s free version allows users to record up to 2 tracks by choosing between audio recording or by using the virtual instrument offered by the app itself.

16. Music Maker JAM

Well, Music Maker JAM is another best Android audio editing app that you can consider. The great thing about Music Maker JAM is that it offers thousands of studio-quality loops, beats, and samples, etc.

Not just that, but Music Maker JAM is also an ultimate sharing platform that allows users to share their tracks directly on different audio platforms like SoundCloud, Facebook, WhatsApp, etc.

17. AudioLab

It is an unreleased app, but you can enjoy it on your Android. The great thing about AudioLab is that it features almost every audio editing feature that users search for.

With AudioLab, you can cut audio, merge audio, record audio, and can do lots of other audio editing stuff.

18. Audio Editor from AndroTechMania

It is another best in class music editor app that you can use on your Android smartphone. The great thing about Audio Editor is that it provides users with lots of useful tools.

With this program, you can create ringtones, mix songs, change audio formats, etc. Not just that, but Audio Editor also offers an Audio Extractor and Tag editor as well.

19. WaveEditor for Android

The great thing about WaveEditor for Android is that it supports a wide range of audio file formats and makes it suitable for audio format conversion. Not just that, but with WaveEditor for Android, you can also mix and edit multi-track.

If we talk about the features, WaveEditor supports multi-track mixing & editing; it offers visual editing tools, a wide range of export options, and more.

So above are the Best Audio Editing Apps For Android. I hope this article helped you! Please share it with your friends also. If you know any other such apps, let us know in the comment box below.

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