This behavior is called transporting and is illegal.

Music is an art form and cultural activity whose medium is timely organized and regular sound waves (a type of mechanical wave).

Its basic elements include strength, tonality, duration, timbre, etc. These basic elements are combined with each other to form the commonly used "formal elements" of music, such as rhythm, melody, harmony, intensity, speed, mode, musical form, texture, etc. The formal elements that constitute music are the means of expression of music. Different types of music may emphasize or ignore some of these elements. Music is performed with a variety of instruments and vocal techniques, and is divided into instrumental music, vocal music (such as songs without instrumental accompaniment), and works that combine singing and instruments.