Play AMR speech using the <audio> tag

AMR is the speech codec of GSM and UMTS calls: 8 kHz narrowband, down to 4.75 kbit/s. Browsers do not decode it; this one goes through libamr_1, built on opencore-amr, which also handles the 16 kHz wideband variant.

Code snippet

<audio is="universal-audio_1" src="ff-16b-1c-8000hz.amr" using="solver_minimal_1"
     with="libamr_1" controls> </audio>

Specifications :

The specifications of the test sequence are :