在电子游戏或音乐游戏中，“horn”通常指的是用来发出声响的乐器。它可能是鼓、笛子、小提琴或其他可以发出声音的音源。在许多游戏中，玩家可以通过操作键盘或手柄来控制这些声音，以实现特定的效果或创造氛围。
The task goes as follows:
1、First, go to the recording studio on West Island where you will receive your assignment.
2、Once you arrive, the people there tell you to go to that specific location to buy drugs. They ask for money and direct you to a particular place.
3、After reaching the designated location, you must press the shift key (Shift) and then ring the horn to inform someone who will come out to sell drugs. If you do not ring the horn, they will not come out, and you will be sent back.
4、When someone arrives at the location, pay them the required amount of money and they will take you to a drug box. You will then need to contact Kent via phone to arrange for Cortez's daughter Merceds to be transported to the recording studio. Once the transfer is complete, you can end the task.