It can generate 4 octave sound select by name. The movement of the octave : in a triangular sign. The movement of the semitone : with # and ♭. The output selection of a continuous sound, continual sound, and the single sound can be done. (toggle)
Please try Pro version if you want to adjust Frequency.
The sound of this program strongly depend on speaker of your device.(Specially in Low frequency)It is not because of me even if the sound is bad.