<audio controls>
<source src="horse.ogg" type="audio/ogg">
<source src="horse.mp3" type="audio/mpeg">
Your browser does not support the audio tag.
</audio><audio src="sound.mp3" autoplay></audio>
MIME Types for Audio Formats
Format MIME-type
MP3 audio/mpeg
OGG audio/ogg
WAV audio/wav
If simply audio '<audio>' tag is written then audio controls will not appear on the web page.
and for showing audio controller we need to write controls attribute in audion tag '<audio controls>'.
Example
<audio controls>
<source src="horse.mp3" type="audio/mpeg">
</audio>