PC. I should clarify that Im using this here Dobbes, use CustomSongToolkit to unpack cache.psarc, open cache7 in 7zip and find tuning.database.json, right click, edit. You can add extra tunings from there manually. Note that B standard has many variants in bass paths, some leave out the 0s on the high b and e strings, some don't. Some have it going up, some down. It's usually 7 7 7 7 7 7 because of 220.Those will have to be each added or you'll get some B standard charts that say "custom tuning" , and some that don't. Heres a tuning template for you, just copypaste it and change the fields to the tuning you want. Change the 0s to whatever values your desired tuning has. For instance Eb would be -1 -1 -1 -1 -1 -1. High F would be 1 1 1 1 1 1 "TuningName": { "UIName": "Tuning name", "Strings": { "string0": 0, "string1": 0, "string2": 0, "string3": 0, "string4": 0, "string5": 0 } },