In her earliest recordings her voice was pitched very high .
Remembered mostly for her deep , distinctive , mature singing voice , she was the lead singer on most of the recordings of the historic Carter Family act in the 1920s and 1930s .
In singer 's earliest recordings singer 's voice was pitched very high .
Remembered mostly for her deep , distinctive , mature singing voice , she was the lead singer on most of the recordings of the historic Carter Family act in the 1920s and 1930s .