Modern smartphones have long ceased to be just devices for making calls and have turned into powerful multimedia stations. Users are increasingly creating content on the go, making videos for social networks or capturing memorable moments. However, the original audio often leaves much to be desired: wind noise, outside conversations or a quiet voice can ruin even the highest quality picture. That is why the question of how to change the sound in a video on Android is becoming one of the most pressing for mobile video makers.
Fortunately, the Google Play ecosystem offers dozens of solutions for this task. From simple editors that allow you to add music to professional studios where you can completely rewrite an audio track, synchronize dialogue and remove noise. The audio replacement process can range from a couple of clicks to complex post-processing, depending on the tool chosen and the desired result. In this article we will analyze in detail all the available methods.
Built-in gallery tools and basic editors
Many users do not even suspect that the necessary functionality is already installed on their device. The standard gallery on smartphones Samsung, Xiaomi and other popular brands often has a built-in video editor. It allows you to perform basic operations such as cropping a frame or replacing audio. Usually, to do this, you just need to open the video, click the “Edit” button and find the section related to sound.
The functionality of such tools is limited, but it is quite enough to quickly replace background music. You can select a track from the phone's internal memory or use preset ringtones. It is important to understand that built-in editor often does not allow you to completely turn off the original sound, but only adjusts its volume by laying a new track on top of the old one. This can lead to a mess of noise if the original audio was of poor quality.
However, for on-the-fly editing, this is the fastest way. The interface is intuitive: you drag the sliders, select files and save the result. The system automatically renders the video while maintaining the original resolution. However, it is worth remembering that compression algorithms in stock applications can be aggressive.
Before saving the edited video, be sure to watch it in full. Sometimes when exporting, audio and video are out of sync for a split second, which is difficult to notice during a quick glance.
⚠️ Attention: In some versions of Android shells (for example, old MIUI firmware), the sound replacement function may be hidden or require the installation of an additional plug-in from the manufacturer.
Professional mobile video editors
If the built-in tools are not enough, specialized applications come to the rescue. Market leaders today are considered to be CapCut, InShot i KineMaster. These apps provide advanced control over audio tracks. Here you can not just add music, but completely remove the original track, leaving only the video sequence. This is critically important for creating professional content.
Work in such editors is based on the principle of multi-track editing. You see a timeline where video and audio are separated. This allows you to cut out unnecessary parts of audio, add sound effects at specific moments and adjust the volume of each track separately. Multi-track editing gives creative freedom not available in simple galleries. You can overlay your voice over the music, fade out at the beginning and end of the track.
Particular attention should be paid to the “Extract Audio” function. Many applications allow you to take audio from another video file and use it in your current project. This is convenient if you downloaded an interesting track from the messenger in video format and want to put it on the background. The process is intuitive: you import the file, select the extraction option, and the audio track appears on the timeline.
Exporting in such applications usually allows you to select the resolution and frame rate. It is recommended to set the maximum values available in the free version so as not to lose picture quality when replacing sound. Some features may be marked with a Proicon that requires a subscription, but basic audio replacement is almost always free.
Applications for recording voice over video (Voiceover)
Often the task is not to replace the music, but to add a commentary or voiceover. For this purpose, there are recording tools voiceover (Voiceover). The principle of operation is simple: you start the video, press the record button and speak into the microphone at the right moments. The application synchronizes your voice with the video in real time.
This approach is ideal for educational videos, product reviews or reaction videos. Quality apps like VideoShow or Funimateallow you to record your voice over existing audio or mute it completely. The main advantage is the ability to re-read a phrase if you make a mistake without rewriting the entire video. You simply delete the bad piece of the audio track and record a new one.
When recording your voice, it is important to maintain silence in the room. Even modern noise reduction algorithms cannot always cope with echoes or street sounds. Use a headset with a good microphone to achieve studio quality. You can often find an equalizer in the application settings to make your voice deeper or clearer.
☑️ Preparing for voice recording
⚠️ Attention: When recording voice through a phone speaker, there is a risk of acoustic feedback (whistle). Always use headphones with a microphone to record voice-over.
Splitting and deleting the original audio track
One of the most common problems is the need to completely clear the video of audio before adding a new one. Not all editors do this explicitly. In some cases, you need to find the mute the sound (Mute) function or the original volume slider and turn it to zero. In others, you need to physically remove the track from the project.
In advanced editors, such as VN Video Editor, the process looks like this: you click on the video clip on the timeline, select “Volume” in the menu that appears and set the value to 0. An alternative option is the “Separate Audio” function, which turns the audio part of the video into a separate object, which can then simply be deleted like a regular file. This gives you complete control.
If you use converters or specialized utilities to change the file container, the process can be technically more difficult. Such tools do not re-encode the video, but only change the container metadata, which happens instantly. However, they are rarely available as convenient mobile applications and are more often used on PCs.
Technical aspect of track separation
When separating audio from video, the application creates a temporary file. Make sure you have enough free memory on your device, otherwise the process may be interrupted during the rendering stage, especially if the video is more than 1 GB.
After deleting old audio, always check to see if lip syncing has disappeared if there is dialogue in the video that you planned to leave. An error in one frame can make the video unnatural.
Comparison of popular applications for working with sound
To make it easier for you to choose a tool, we have compiled a comparison table of popular solutions. Each of them has its own strengths: some are better suited for social networks, others for serious editing. The choice depends on your specific tasks and level of training.
Pay attention to the presence of watermarks. Many free versions of apps put their logo on the finished video, which can look unprofessional. The table indicates whether this mark can be removed for free.
| Application | Removing the original | Voice recording | Watermark | Difficulty |
|---|---|---|---|---|
| CapCut | Yes (full) | Yes | Can be removed | Low |
| InShot | Yes (adjustment) | Yes | Removed by viewing advertising | Low |
| KineMaster | Yes (multi-layered) | Yes | Available in the free version | Medium |
| VN Video Editor | Yes (full) | Yes | No | High |
| YouCut | Yes | No | No | Low |
For novice users, CapCut or InShot would be the best choice due to the balance between a simple interface and wide functionality.
It is also worth considering format support. Some applications work better with MP4, others import MKV or MOVwithout problems. If your video is in a rare format, a pre-converter may be required.
Frequent errors and technical nuances
When working with audio on mobile devices, users often encounter a number of typical problems. The most common is desynchronization. This happens when the video's frame rate doesn't match the export settings, or when the phone's processor can't handle rendering a heavy file. As a result, the sound begins to lag behind the picture or ahead of it.
Another problem is the change in bitrate. When saving a video, some apps automatically compress the audio, making it flat and quiet. To avoid this, in the export settings, look for the parameter audio bitrate and set it not lower than 128 kbit/s, but better 192 kbit/s or 320 kbit/s. This will provide rich sound.
Don't forget about copyright. Social networks such as Instagram, YouTube and TikTok have strict algorithms for detecting protected music. Using a popular track without a license may result in the video being blocked or the sound being muted. Use free libraries inside editors or services with royalty-free music.
⚠️ Attention: Application interfaces are updated frequently. If you do not find the described button, look for a similar function in the adjacent menus or update the application to the latest version on Google Play.
It is also worth mentioning the problem of codec compatibility. If you inserted audio in FLAC or WAV high resolution format and got silence in the output, try converting the track to standard AAC or MP3 before importing it into the video editor.
FAQ: Answers to popular questions
Is it possible to change the sound in a video without re-encoding it?
Yes, this is possible with the help of specialized container editors, but there are very few such applications on Android. Most video editors perform a full rendering (transcoding) of the file when saving to ensure compatibility of the new audio track with the video stream.
Why did the video weigh more after replacing the audio?
This is due to the export settings. You may have accidentally increased the video bitrate or selected a higher compression profile. Also, adding uncompressed audio (such as WAV) can increase the file size compared to the original compressed track.
How to overdubb two sounds at the same time?
Use the Add Audio or Overlay Music feature. In professional editors you can add an unlimited number of audio tracks. Just adjust the volume of each of them so that they do not interrupt each other.
Free applications put a watermark, how to remove it?
In most cases, the watermark can be removed by watching a short advertising video inside the application before exporting. In the settings of some apps there is a “Remove watermark” item, which is activated after viewing an advertisement.
Do these applications support stereo sound?
Yes, modern smartphones and applications support stereo. However, make sure that the original audio file is also recorded in stereo. When exporting, choose settings that do not force the sound to mono.