This work is a part of the PostPost postal services to parallel universes. Based on MWPN (Many-Worlds Private Network) using QRNG+, post-quantum hybrid cryptography and the ternary encoding Slater language. The PostPost whitepaper: https://horomox.com/postpost It sends musical postcards to other worlds. A telegraph keyboard and an augmented post horn in the form of a musical organ. The sound is made with modulated white noise randomly generated with QRNG. Messages on postcards: “hello, world” in plain text on the card number zero with the calm state (the lowest frequency sound); other cards contain ciphertext of Tibetan mantras, encoded with PostPost, transcribed with Slater (read more in the whitepaper) to facilitate the inter-world communication. 2K video made of low-res 308x219px PostPost cards. PostTeleGraph received the Special Recommendation Award from the Herbert W. Franke Foundation for its participation in the Contact Attempt (the 50th Anniversary of the Arecibo Message)