lobotomy.py

def stereo_vol_zero_middle(panning):
    assert panning >= -1 and panning <= 1

    left, right = 1, 1
    if panning < 0:
        right = right - abs(panning)
    elif panning > 0:
        left = left - abs(panning)
    return left, right

assert stereo_vol_zero_middle(-1) == (1, 0)
assert stereo_vol_zero_middle(0) == (1, 1)
assert stereo_vol_zero_middle(1) == (0, 1)

print(stereo_vol_zero_middle(0.25))
print(stereo_vol_zero_middle(0.5))
print(stereo_vol_zero_middle(0.75))

def stereo_vol_half_middle(panning):
    assert panning >= 0 and panning <= 1

    return stereo_vol_zero_middle(panning * 2 - 1)

assert stereo_vol_half_middle(0) == (1, 0)
assert stereo_vol_half_middle(0.5) == (1, 1)
assert stereo_vol_half_middle(1) == (0, 1)

print(stereo_vol_half_middle(0.25))
print(stereo_vol_half_middle(0.5))
print(stereo_vol_half_middle(0.75))