It would be nice to see a detailed comparison regarding alphanumeric efficiency, licenses and mobile readers, error correction, no error correction between the

It would be nice to see a detailed comparison regarding alphanumeric efficiency, licenses and mobile readers, error correction, no error correction between the options below as Voiceye claims uncompressed 3M per A4, which is twice the efficiency of Paperback or QR codes. The mobile app is usable and supports midi encoding as well, but to make Voiceye codes you have to buy 500$ software. Are they using a form of compression? * QR version 40 (177x177) tiled * Voiceye * Paperback without compression * Grade 1 braille * Grade 2 braille * Morse code * Optar Braille would be suitable for people who are deaf and blind as well.