The sky evenly grey, moisture descends calmly, quietly. Some bird's song sounding rather akin to a child whistling poorly. This song grabs attention solidly. I know my walls absorb some tonality, change timber, perhaps limiting the time of the song. With the window open, the range expands. Compelled to understand this strange song better, I slide open a window. Slowly, carefully; trying to ensure that from which it emanates remains unaware, undisturbed, thus continuing unabated. An element of Heisenberg, I guess. The sine wave of pitch clarifies. More tonal range, combined with an interesting harmonic. Do both pitches originate together? Perhaps a strange acoustical effect as sounds merge? Perhaps simply echo, with the scattered sound's timbre losing elements, absorbed by the world hosting it, deflecting it? I feel the different bell curves. One wave reflecting pitch, rising, cresting, returning to the origination. Then a pause, this few seconds of rest before recommencing....
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