Extended data:
The pronunciation of pigeon whistle is basically simultaneous, and it is impossible to stop according to people's wishes. Therefore, for every pigeon whistle, we must ask it to be loud and accurate. For example, the difference between the two sounds in the bar should be sophomore or junior, and the pentatonic scale should be consistent with the pentatonic scale. For groups of pigeon whistles, just like a band, it is required that the instruments with high pitch, low pitch and different timbres should be as complete as possible, that is to say, all kinds of pigeon whistles that can work are complete.
When dubbing pigeon whistle, we should follow a principle, that is, no whistle should be too big to overwhelm or cover up another variety in volume and timbre. In order to get the best scheme, the load capacity of each pigeon and the volume of each whistle need to be considered. Reasonable dubbing can only be mastered through experiments and investigations, and then how to choose whistle dubbing can be worked out according to the specific situation.
Pigeons in frisbee should choose whistle dubbing and enjoy its sound. Because pigeons are circling and rotating, the whistling wind has different angles and strengths, and the whistling is very different. Especially when pigeons turn left and right, that is, the so-called "falling plate", the whistle changes more obviously and more regularly. At this time, it is not the whistle, but the change of the symphony.
References:
Baidu encyclopedia-pigeon whistle