CODEWITHSUNDEEP
pythonaudio
Pallavi
Pallavi

Reputation: 129

Writing to a .wav file

I have used the write function from scipy.io.wavfile to generate a .wav file. 

final_out = np.int16(stereo_out/np.max(np.abs(stereo_out)) * 32767)
write('final.wav', fs, final_out)

Is there any alternate function for write that allows more than 32767 samples?

Upvotes: 2

Views: 472

Answers (2)

memoselyk
memoselyk

Reputation: 4118

There is not such limitation in the number of samples that can be written to a a wav file with scipy.io.wavfile. The actual limitation on the number of samples is 2^32 (4,294,967,296), but it comes from the fact that the header stores the number of samples as a 32-bit unsigned integer.

The WAV format, however, stores the amplitude of each sample in 16-bits.

With a signed integer of 16-bits, you can only store numbers in the range [-32768, 32767] inclusive, you'll need to scale your signal accordingly to fit that range.

You can think of that number as a fraction (ratio) of the highest amplitude that your system can produce.

Upvotes: 1

Noctis Skytower
Noctis Skytower

Reputation: 21991

You might take a look at the wave module in Python's Standard Library. It may allow you to write more than 32767 samples, but I am unsure as to what limitations you may come across while trying to use it.

Upvotes: 0

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