It is important to note that the dance organ developed to closely follow the new emerging styles of popular music. The earliest organs musically aim to replicate and replace a small dance orchestra playing musical styles of the late 1800s—early 1900s and the sounds of the bal-musette. The musical rhythms are mainly the older formal dances such as waltz, two-step, polka etc. During these early years the instruments were, in addition to loud performance, capable of soft solo playing with distinct solo pipework voices coupled with swell shutters in order to handle the characteristic gentle ballroom dances of the early 1900s such as the valse tres-lente, the valse boston (or Cross-step waltz) and the Hesitation waltz styles.