Play Genshin Impact instruments with your MIDI Keyboard

GenshinMIDI.py

# This script enables MIDI support for the musical instruments in
# Genshin Impact.

# It works by listening for MIDI messages, and then converting
# them into typing keystrokes based on a mapping between the
# musical notes and the computer keys.

# It bahaves like a normal computer keyboard, and so, this code
# can be modified to work with other games as well. All you need
# to do is create a mapping function for that game.

# IMPORTANT:
# The keystrokes don't get detected by the game unless this script
# is run with Administrator priviledges.

# Author: Daniel Fernandes

import pyautogui
import pydirectinput
import mido

# Logs the keystrokes sent
LOGGING = True

# Override default value to improve responsiveness
pydirectinput.PAUSE=0

# Mapping Function for GI Lyre
# You can also just create a dictionary of MIDI notes mapped
# to letters, instead of mapping them procedurally like this
keymap = "zxcvbnmasdfghjqwertyu"
whitekeys = [0, 2, 4, 5, 7, 9, 11]
def mapNoteToKey(note):
    if (note % 12 in whitekeys):
        octave = note // 12
        root = whitekeys.index(note % 12)
        keyindex = (root + len(whitekeys) * (octave - 4)) % len(keymap)
        mappedKey = keymap[keyindex]
        return mappedKey

def isNoteOn(msg):
    return msg.type == 'note_on' and msg.velocity != 0

def isNoteOff(msg):
    return msg.type == 'note_off' or (msg.type == 'note_on' and msg.velocity == 0)

inputPorts = mido.get_input_names()

if (len(inputPorts) == 0):
    print("No MIDI inputs available. Please connect one and restart this script.")
    exit()

# Uncomment the next three lines to list the names of all ports
# print("Available Input Ports: ")
# for port in inputPorts:
#     print(port)

# Specify the port to connect to by passing its name to open_input()
# By default, it will connect to the first port listed to mido
with mido.open_input() as inport:
    print("Listening to Input Port:",  inport.name)
    for msg in inport:
        if isNoteOn(msg):
            key = mapNoteToKey(msg.note)
            if not key: continue
            pydirectinput.keyDown(key)
            if (LOGGING): print('Key Pressed:', key)
        elif isNoteOff(msg):
            key = mapNoteToKey(msg.note)
            if not key: continue
            pydirectinput.keyUp(key)
            if (LOGGING): print('Key Released:', key)