What is the use of type attribute in audio or video tag

Question

Use of type attribute

Answer 1

1. Representing audio in digital form involves a number of steps and processes, with multiple formats available both for the raw audio and the encoded or compressed audio which is actually used on the web.

Source :

https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Audio_concepts

2. Browsers don't all support the same file types and audio codecs; you can provide multiple sources inside nested <source> elements, and the browser will then use the first one it understands:

<audio controls>
<source src="myAudio.mp3" type="audio/mpeg">
<source src="myAudio.ogg" type="audio/ogg">
<p>Your browser doesn't support HTML5 audio. Here is
a <a href="myAudio.mp4">link to the audio</a> instead.</p>
</audio>

Source:

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/audio

https://developer.mozilla.org/en-US/docs/Web/Media/Formats