Streaming a file from elixir

some_controller.ex

def sup(conn, _params) do
    conn = conn
      |> put_resp_header("content-type", "audio/mp3")
      |> send_chunked(200)

    File.stream!("priv/static/assets/sample4.mp3", [], @chunk_size)
    |> Enum.into(conn)
end

# https://stackoverflow.com/questions/37544655/elixir-stream-audio-to-users