At the slightest contact with the male, whom I am in a Macbook Pro, the plug contact and the music loses turns to the internal monitors.
It's really not for me to use in this sense, as it is nerve racking. since latest I feel I need to move the computer with kid gloves.
Conclusion:
The plug is too loose and slip's play a piece out so the audio playback aborts.
I got me today a Neutrick jack for 3 ordered and replace this cheap.