RemixIconEx.Media.music

You're seeing just the function music, go back to RemixIconEx.Media module for more information.
Link to this function

music(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Media.music()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 13.535V3h8v2h-6v12a4 4 0 1 1-2-3.465zM10 19a2 2 0 1 0 0-4 2 2 0 0 0 0 4z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}