You can try adding additional audio file formats for the <audio> tag to support more platforms and browsers:
<audio class="blue" controls> <source src="audio/test1.ogg" type="audio/ogg"> <source src="audio/test1.mp3" type="audio/mpeg"> </audio>
In addition, you will need to place the appropriate resources on the server ( audio/test1.ogg in this case). There are many online converters (e.g. http://media.io/ ) that can help you convert files to other formats.
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