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Audio
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‎README.md‎

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -2738,10 +2738,10 @@ def read_wav_file(filename):
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an_int = int.from_bytes(a_bytes, 'little', signed=width!=1)
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return an_int - 128 * (width == 1)
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with wave.open(filename, 'rb') as file:
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frames = file.readframes(file.getnframes())
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width = file.getsampwidth()
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samples = (frames[i: i + width] for i in range(0, len(frames), width))
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return [get_int(a) / pow(2, width * 8 - 1) for a in samples]
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frames = file.readframes(file.getnframes())
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byte_samples = (frames[i: i + width] for i in range(0, len(frames), width))
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return [get_int(b) / pow(2, width * 8 - 1) for b in byte_samples]
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```
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### Write Float Samples to WAV File
@@ -2756,7 +2756,7 @@ def write_to_wav_file(filename, float_samples, nchannels=1, sampwidth=2, framera
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file.setnchannels(nchannels)
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file.setsampwidth(sampwidth)
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file.setframerate(framerate)
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file.writeframes(b''.join(get_bytes(a) for a in float_samples))
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file.writeframes(b''.join(get_bytes(f) for f in float_samples))
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```
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### Examples
@@ -2771,7 +2771,7 @@ write_to_wav_file('test.wav', frames_f)
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```python
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from random import random
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add_noise = lambda value: value + (random() - 0.5) * 0.03
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frames_f = (add_noise(a) for a in read_wav_file('test.wav'))
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frames_f = (add_noise(f) for f in read_wav_file('test.wav'))
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write_to_wav_file('test.wav', frames_f)
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```
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‎index.html‎

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Original file line numberDiff line numberDiff line change
@@ -2331,10 +2331,10 @@
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an_int = int.from_bytes(a_bytes, <span class="hljs-string">'little'</span>, signed=width!=<span class="hljs-number">1</span>)
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<span class="hljs-keyword">return</span> an_int - <span class="hljs-number">128</span> * (width == <span class="hljs-number">1</span>)
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<span class="hljs-keyword">with</span> wave.open(filename, <span class="hljs-string">'rb'</span>) <span class="hljs-keyword">as</span> file:
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frames = file.readframes(file.getnframes())
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width = file.getsampwidth()
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samples = (frames[i: i + width] <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">0</span>, len(frames), width))
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<span class="hljs-keyword">return</span> [get_int(a) / pow(<span class="hljs-number">2</span>, width * <span class="hljs-number">8</span> - <span class="hljs-number">1</span>) <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> samples]
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frames = file.readframes(file.getnframes())
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byte_samples = (frames[i: i + width] <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">0</span>, len(frames), width))
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<span class="hljs-keyword">return</span> [get_int(b) / pow(<span class="hljs-number">2</span>, width * <span class="hljs-number">8</span> - <span class="hljs-number">1</span>) <span class="hljs-keyword">for</span> b <span class="hljs-keyword">in</span> byte_samples]
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</code></pre></div>
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<div><h3 id="writefloatsamplestowavfile">Write Float Samples to WAV File</h3><pre><code class="python language-python hljs"><span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">write_to_wav_file</span><span class="hljs-params">(filename, float_samples, nchannels=<span class="hljs-number">1</span>, sampwidth=<span class="hljs-number">2</span>, framerate=<span class="hljs-number">44100</span>)</span>:</span>
@@ -2347,7 +2347,7 @@
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file.setnchannels(nchannels)
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file.setsampwidth(sampwidth)
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file.setframerate(framerate)
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file.writeframes(<span class="hljs-string">b''</span>.join(get_bytes(a) <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> float_samples))
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file.writeframes(<span class="hljs-string">b''</span>.join(get_bytes(f) <span class="hljs-keyword">for</span> f <span class="hljs-keyword">in</span> float_samples))
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</code></pre></div>
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<div><h3 id="examples-1">Examples</h3><div><h4 id="savesasinewavetoamonowavfile">Saves a sine wave to a mono WAV file:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> math <span class="hljs-keyword">import</span> pi, sin
@@ -2358,7 +2358,7 @@
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<div><h4 id="addsnoisetoamonowavfile">Adds noise to a mono WAV file:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> random <span class="hljs-keyword">import</span> random
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add_noise = <span class="hljs-keyword">lambda</span> value: value + (random() - <span class="hljs-number">0.5</span>) * <span class="hljs-number">0.03</span>
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frames_f = (add_noise(a) <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> read_wav_file(<span class="hljs-string">'test.wav'</span>))
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frames_f = (add_noise(f) <span class="hljs-keyword">for</span> f <span class="hljs-keyword">in</span> read_wav_file(<span class="hljs-string">'test.wav'</span>))
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write_to_wav_file(<span class="hljs-string">'test.wav'</span>, frames_f)
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</code></pre></div>
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