The rhythmic characteristics of happy doremi music are rhythmic. Notation of the duration and number of the basic unit beats in each measure. The number above the time signature indicates the number of beats per measure, and the number below the time signature indicates the duration of each beat. Music is an art form and cultural activity whose medium is timely organized and regular sound waves. 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. Music is performed with a variety of instruments and vocal techniques, and is divided into instrumental music, vocal music, and works that combine singing and instruments.