INCORRECT! Such a passphrase is invalid!
See: https://en.wikipedia.org/wiki/Wi-Fi_Protected_Access#Target_users_(authentication_key_distribution)
This key may be entered either as a string of 64 hexadecimal digits, or as a passphrase of 8 to 63 printable ASCII characters.[18] If ASCII characters are used, the 256 bit key is calculated by applying the PBKDF2 key derivation function to the passphrase, using the SSID as the salt and 4096 iterations of HMAC-SHA1.[19] WPA-Personal mode is available with both WPA and WPA2.
So how would your clients enter an ASCII passphrase if you did such a thing?