I was listening to a song played on the Dizi (Chinese diatonic bamboo flute). Dizi like other diatonic flutes comes in different keys. When listening to music played by someone else, how can I find out the key of the flute?
Now I'm not asking for someone to identify the key of the flute in the video for me. I'm just curious about how to find the key. I would think the first step would be to find out the scale of the song, that would narrow down the options of the keys.
What I know of eastern flutes is that the key of the flute is the note that gets played with three fingers down.
For example, if I hold three fingers down and it gives a C, then the flute is in the key of C.
I believe with western flute it's all fingers down.
So the C key eastern flute would be considered G key in the west. Because if you were to hold down all fingers (6 fingers) on C key eastern flute, it would play the G note.
On a C key diatonic flute, we can play comfortably the scales, C major, G major, A minor, E minor. Playing anything else would require half-covering of holes, making it hard to play. If someone is playing a song in E minor scale, for example, we can know that the flute they playing has to be in the key of C or G.