If a PCM wav audio file is converted into base64 format, to load in the original data

with open("wav_b64.txt", "rb") as f:

input_sig = base64.b64decode(f.read()) # read in the txt file

binaryHeader = input_sig[:44]

# https: // onestepcode.com / read - wav - header /

samplerate = np.frombuffer(binaryHeader[24:28], dtype=np.int32)[0]

binarySound = input_sig[44:]

# following conversion is suggested by Thorin

# convert to integers

sig = np.frombuffer(binarySound, dtype=np.int16)

# convert PCM to float

i = np.iinfo(sig.dtype)

abs_max = 2 ** (i.bits - 1)

offset = i.min + abs_max

y_data = (sig.astype('float32') - offset) / abs_max