According to the exorcist, it is good to use the playable recording of priest's prayer for the blessing e.g water or salt. ?

In Catholic teaching and the practice of exorcists, a playable recording of a priest’s prayer cannot be used to bless water or salt. Sacramentals must be blessed by an ordained member of the clergy (priest, deacon, or bishop) who has the proper intention to perform the blessing. 

Key reasons why a recording is insufficient include:

Necessity of the Minister: A blessing is a liturgical act performed by a living minister acting in persona Christi (in the person of Christ). A recording lacks this immediate presence and ministerial action.

Real-Time Requirement: According to Church principles, a blessing's intended effect typically requires participation in "real time". For example, even papal blessings over media generally only apply to those following the transmission live, not later via recording.

Active Intention: The efficacy of a sacramental depends on the official liturgical prayer of the Church and the intention of the presiding minister. A recording cannot possess or exercise this intention over a physical object. 

Proper Use of Blessed Water and Salt 

While you cannot create sacramentals using a recording, exorcists encourage the laity to use salt and water that has already been properly blessed by a priest. 

Obtaining Sacramentals: You should visit a local Catholic parish to have salt and water blessed. Many exorcists recommend salt blessed specifically using the traditional prayers from the Rituale Romanum (Roman Ritual), which include an exorcism rite for the salt and water themselves.

Lay Prayers: Once the salt or water is blessed, the laity can pray simple prayers of protection while using them, such as: "Through this Holy Water, I humbly ask You to cast the evil spirits in my room, in the Name of the Father, and of the Son, and of the Holy Spirit. Amen". 

Would you like me to look up the specific text of the traditional priest's prayer for blessing salt and water so you can bring it to your parish priest?