import numpy as np

values = np.array([-1.0, -0.55, -0.10, 0.25, 0.60, 1.0])
bits = 4
largest_code = 2 ** (bits - 1) - 1
scale = np.max(np.abs(values)) / largest_code

codes = np.rint(values / scale)
codes = np.clip(codes, -largest_code, largest_code).astype(np.int8)
restored = codes * scale

print("original values:", values.tolist())
print("4-bit codes:", codes.tolist())
print("restored values:", np.round(restored, 3).tolist())
print("raw payload:", len(values) * 16, "bits ->", len(values) * 4, "bits")

# Output:
"""
original values: [-1.0, -0.55, -0.1, 0.25, 0.6, 1.0]
4-bit codes: [-7, -4, -1, 2, 4, 7]
restored values: [-1.0, -0.571, -0.143, 0.286, 0.571, 1.0]
raw payload: 96 bits -> 24 bits
"""