This is the  WP code in a code block:
[audio src="https://archettonet.files.wordpress.com/Scales/Viola/3octave/CMajor/Viola-3-octave-c-major-shift1.mp3"][/audio]
This is the  WP code in a shortcode wrapper:
      Viola-3-octave-c-major-shift1
This is the  WP code in a shortcode block:
      Viola-3-octave-c-major-shift1