Book 444

Book 444 is an online digital book of concepts, techniques, equipment recommendations, hardware, software and products related to audio, lighting and video, free to use for all users subscribed to academia444.com, prepared by two Mexican artists, Artist Electronic Music Audiovisual Mauricio Montoya Mares known as Mauty together with the Engineer and producer Arturo Sigler Villafuerte known as Spiritual Frequency, who provide all their professional knowledge extracted from the best books and experiences in shows at a professional level.