The cultural history of keyboards leads in the period of the Middle Ages when musical instruments were created not primarily for making music but for the dialogue with God, as described in the title Sacred Phones. The keyboard of the piano bears a symbolic content, with significant importance for the Western music - which is worked out here for the first time.
Literaturmarkt.info, Anja Rosenthal, 23.12.2013
"A study with an absolute added value of knowledge. The calculator, mobile phones and the piano have much more in common than people suspect. They feature a keyboard, a board of keys, which opens up new worlds to the user: The calculator leads to the world of mathematics. The painted pianos and harpsichords lead to multimedia, to the world of sound and thus the music.
And not only that: Aurelius Belz shows in his book "Sacred Phones - The use of keyboards in the late Middle Ages" that the computer's keyboard, for example, goes back to ancient roots and explains the context in which the terms "button" and "key" have tob e seen. So, many amazing things are revealed to the reader - for example what a keystroke has to do with religion.
After an introduction, we dive in three chapters ("The oldest construction drawing of a keyboard", "The oldest stringed keyboard instrument", "The development of the Western tonal system") into the midst of this interesting topic and learn much about we previously did not know.
Belz is able, with his wealth of knowledge, to entertain the reader and to demonstrate new opportunities to the science of organology. Here art and musicology play an equally important role as theology and history. So we get a comprehensive overview of the encounter between religion and science. Aurelius Belz lays in his study the foundations for a discussion that will undoubtedly last longer than the reading of "Sacred phones".
But not only for this reason, the present work to be regarded as valuable. It contributes to a better understanding of democracy by making a didactically valuable contribution to this subject. The German author makes in this book more than clear that past and present relate to each other and accordingly, without each other are impossible to imagine.
Such a journey into the late Middle Ages every reader must once have experienced - even if a scientific study is of a slightly different design than a historical novel. What Aurelius Belz tells to his reader in "Sacred phones" is extremely exciting and makes him a lot smarter at the same time. You can feel the passion of the art historian on every page, so you will after a short time already be swept away and after closing the book be quite out of breath. For a study with a scientific background this is more than a respectable performance."