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How to add audio to MP4

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Enhance your MP4 videos by adding audio with our simple and user-friendly audio integration feature.

How to add audio to MP4

Are you looking to enhance your MP4 videos by adding audio? Whether you want to include background music, a voice over, or sound effects, incorporating audio into your MP4 files can significantly improve their quality and engagement. In this article, we will explore why you should add audio to an MP4, the types of audio files you can use, and how to seamlessly integrate audio into your MP4 videos using Speechify Video Studio.

Why you should add audio to an MP4

Audio plays a vital role in enhancing the overall viewing experience of a video. It adds depth, emotion, and engagement, making your content more captivating and memorable. Whether you are creating a personal project or a professional video, adding audio to your MP4 files can:

  • Enhance storytelling — Audio can convey emotions and help you tell a more compelling story. It allows you to create a deeper connection with your audience.
  • Set the mood — Background music can evoke specific moods or atmospheres, enhancing the overall ambiance of your video. Whether you want to create a sense of excitement, suspense, or happiness, the right audio can make all the difference.
  • Provide clarity — Adding a voice over to your MP4 video can help clarify complex concepts, provide instructions, or narrate a story. It ensures your message is delivered effectively and understood by your viewers.

Types of audio files you can add to an MP4

When adding audio to your MP4 video, you have several options regarding the audio file formats you can use. Here are some common audio formats compatible with MP4:

  • MP3 (MPEG-1 Audio Layer 3) — This widely-used audio format offers good sound quality with small file sizes, making it ideal for online sharing and streaming.
  • WAV (Waveform Audio File Format) — WAV files provide high-quality audio and are commonly used in professional audio production.
  • AAC (Advanced Audio Coding) — AAC is a popular audio format that offers excellent sound quality at lower bitrates, ensuring efficient compression without significant loss of audio fidelity.
  • WMA (Windows Media Audio) — Developed by Microsoft, WMA files are commonly used on Windows platforms and offer good sound quality.
  • Other formats like OGG, FLAC, and M4A may also be compatible with MP4, depending on the software or platform you use.

Types of audio you can add to an MP4 project

Audio plays a crucial role in conveying emotions, setting the mood, and delivering your message effectively. However, the choice of audio depends on the purpose and content of your MP4 video. Here are a few different types of audio that can significantly enhance your video’s impact and engagement:

Background music

Adding music tracks to your MP4 video can help create an engaging atmosphere, evoke emotions, and support the overall theme. Just remember to add music that complements the mood and style of your video.

Voice over

If you need to explain concepts, provide instructions, or narrate a story, consider adding a voice over. A clear and well-recorded or AI-generated voice over can enhance the understanding and impact of your video.

Sound effects

Incorporating sound effects can make your video more dynamic and immersive. From subtle environmental sounds to dramatic effects, they can add depth and realism to your visuals.

How to add audio to MP4 with Speechify Video Studio

Speechify Video Studio is an advanced video editing software that simplifies the process of adding audio to your MP4 videos. It offers a user-friendly interface and powerful features to enhance your video editing experience. Here's a step-by-step guide on how to use Speechify Video Studio to add audio to your MP4 files:

  1. Open Speechify Video Studio on your Windows, Mac OS, iPhone or Android device.
  2. Import your MP4 video clip by clicking the "Import Media" or "Add" button. You can also drag and drop the video file directly into the software.
  3. Once your video is imported, locate the "Audio" section in the software's interface. Click on "Add Audio" or "Add Audio Track" to select your new audio file from your local storage or from a cloud service like Google Drive or Dropbox.
  4. After selecting the audio clip, such as an MP3 audio file, you can trim, resize, or adjust its volume to fit your video perfectly. You can also add multiple original audio tracks and adjust their timing to create a layered audio experience.
  5. To further enhance your video, Speechify Video Studio offers a range of video editing tools, including transitions, effects, and the ability to add subtitles, watermarks, or AI-generated voice overs.
  6. Once you are satisfied with your edits, choose the desired output format, such as MP4, MOV, AVI, MKV, or WMV, and select the appropriate encoding settings.
  7. Click the "Export" or "Save" button to process your video with the newly added audio. The software will combine the audio and video tracks, ensuring a seamless integration.

Speechify Video Studio — A comprehensive video editing platform

Speechify Video Studio is a comprehensive video editing platform that offers a range of powerful AI features. With its built-in video converter, users can easily convert video files to different formats. The software also allows users to trim videos, removing unwanted sections and creating polished final products. Additionally, Speechify Video Studio includes features tailored for social media, enabling users to optimize their videos for various platforms and easily share their creations. Whether you’re looking to create engaging tutorials, GIFs, professional videos, or more, Speechify Video Studio has you covered. See how the video editor can take your videos to the next level by trying Speechify Video Studio for free.


How can I add audio to my MP4 videos?

With Speechify Video Studio, adding audio to your MP4 videos has never been easier. The intuitive interface and powerful editing tools enable you to create professional-quality videos without the need for extensive technical knowledge.

How can I extract audio from a video?

You can extract audio from a video by using Speechify Video Studio, which allows you to save the audio track separately in a desired audio format.

How do I edit a free video?

To edit a free video, you can utilize Speechify Video Studio to trim, merge, add effects, and customize your video content.

What are the best websites to share videos online?

Some of the best websites to share videos online include YouTube, Vimeo, Dailymotion, and Facebook, offering wide user bases and various features for sharing and discovering video content.

Can I play Mp4 files on VLC media player?

Yes, VLC media player supports playing MP4 (MPEG-4) files, making it a versatile option for playing this popular video format.

Cliff Weitzman

Cliff Weitzman

Cliff Weitzman is a dyslexia advocate and the CEO and founder of Speechify, the #1 text-to-speech app in the world, totaling over 100,000 5-star reviews and ranking first place in the App Store for the News & Magazines category. In 2017, Weitzman was named to the Forbes 30 under 30 list for his work making the internet more accessible to people with learning disabilities. Cliff Weitzman has been featured in EdSurge, Inc., PC Mag, Entrepreneur, Mashable, among other leading outlets.