Embed audio in dictation?

Hi, 

can you tell me which is the best service for embedding audio in dictation? I was thinking it's Soundcloud but they don't provide source code for the audio and I can't embed it. Also I'm not sure it's a good idea to upload all files to my WordPress website they are hundreds of small audio files...

What is the best option to manage my audio with h5p exercises?

Best Regards