which one is more effective? Make your own subliminal by your own voice or use the subliminal message music which made by other?
Or it have same result?
Whichever one works for you will be the most effective. It's an individual thing. One size does not fit all. Use both and see how you feel about them. Go with the one that feels the best. =)
If you create your own you can speak them in the first person first, such as "I am confident". And you can use your own voice or someone of the same sex at least. Then you can repeat all of your affirmations again in second person - "You are confident". And this time you can use a voice of the opposite sex.
I wonder if it would be better to use your own voice when speaking them in the first person. It might be obvious to your subconscious mind that it's not you if it's being spoken in someone else's voice. I don't know, it might not matter.
i want to know that is it also effective if the message is spoken by other voice
It depends on how much authority you give the voice to tell you what to do ;)