diff --git a/docs/tech_docs/python/PyAudio_SoundFile.md b/docs/tech_docs/python/PyAudio_SoundFile.md new file mode 100644 index 0000000..31475f3 --- /dev/null +++ b/docs/tech_docs/python/PyAudio_SoundFile.md @@ -0,0 +1,129 @@ +Focusing on Python libraries specific to audio processing opens a vast array of possibilities for handling audio data, from simple playback and recording to complex audio analysis and signal processing tasks. Beyond `Librosa`, which is tailored more towards music and audio analysis, other libraries like `PyAudio` for audio I/O, and `SoundFile` for reading and writing audio files, play crucial roles in the audio processing ecosystem. Here’s an integrated guide covering these libraries, highlighting their capabilities and common use cases. + +### PyAudio - Audio I/O Interface + +PyAudio provides Python bindings for PortAudio, the cross-platform audio I/O library, enabling users to easily use audio input and output devices. + +#### Installation +```sh +pip install pyaudio +``` +Note: Installing PyAudio might require additional dependencies on your system. Refer to the PyAudio documentation for platform-specific instructions. + +#### Basic Usage + +##### Playing Audio +```python +import pyaudio +import wave + +filename = 'path/to/your/audio/file.wav' + +# Open the file +wf = wave.open(filename, 'rb') + +# Create a PyAudio interface +p = pyaudio.PyAudio() + +# Open a stream to play audio +stream = p.open(format=p.get_format_from_width(wf.getsampwidth()), + channels=wf.getnchannels(), + rate=wf.getframerate(), + output=True) + +# Read data in chunks and play +data = wf.readframes(1024) +while data != b'': + stream.write(data) + data = wf.readframes(1024) + +# Close the stream and PyAudio interface +stream.close() +p.terminate() +``` + +##### Recording Audio +```python +CHUNK = 1024 +FORMAT = pyaudio.paInt16 # Depends on your needs +CHANNELS = 2 +RATE = 44100 # Sampling rate +RECORD_SECONDS = 5 +WAVE_OUTPUT_FILENAME = "output.wav" + +p = pyaudio.PyAudio() + +stream = p.open(format=FORMAT, + channels=CHANNELS, + rate=RATE, + input=True, + frames_per_buffer=CHUNK) + +print("Recording...") + +frames = [] + +for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)): + data = stream.read(CHUNK) + frames.append(data) + +print("Finished recording.") + +# Stop and close the stream +stream.stop_stream() +stream.close() +# Terminate the PyAudio session +p.terminate() + +# Save the recorded data as a WAV file +wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb') +wf.setnchannels(CHANNELS) +wf.setsampwidth(p.get_sample_size(FORMAT)) +wf.setframerate(RATE) +wf.writeframes(b''.join(frames)) +wf.close() +``` + +### SoundFile - Reading and Writing Audio Files + +`SoundFile` is a library for reading from and writing to audio files, such as WAV and FLAC, using data formats supported by libsndfile. + +#### Installation +```sh +pip install SoundFile +``` + +#### Basic Usage + +##### Reading an Audio File +```python +import soundfile as sf + +data, samplerate = sf.read('path/to/your/audio/file.wav') +# `data` is a NumPy array containing the audio samples +# `samplerate` is the sampling rate of the audio file +``` + +##### Writing an Audio File +```python +sf.write('path/to/new/audio/file.wav', data, samplerate) +``` + +### Commonly Used Features Across Libraries + +- **Audio Playback and Recording**: PyAudio provides low-level interfaces for audio playback and recording, ideal for applications requiring direct control over audio I/O. +- **Audio Analysis**: Libraries like Librosa are tailored for analyzing audio files, extracting features useful for music information retrieval, machine learning models, and more. +- **File Conversion and Processing**: SoundFile supports a wide range of audio formats, enabling easy conversion between them and manipulation of audio data. + +### Potential Use Cases + +- **Voice Recognition Systems**: Implementing systems that can recognize spoken commands or transcribe speech into text. +- **Music Genre Classification**: Developing algorithms to categorize music tracks into genres based on their audio features. +- **Sound Effect Generation**: Creating applications that generate sound effects or modify existing audio clips. +- **Audio Content Management**: Building tools for managing large audio datasets, including conversion, metadata tagging, and quality analysis. + +### Integration and Workflow + +A typical workflow might involve using PyAudio for capturing audio input from a microphone, processing or analyzing the audio with Librosa, and storing the processed audio using SoundFile. Each library addresses different aspects of audio handling in Python, providing a comprehensive toolkit for developers working on audio-related projects. + +By leveraging these libraries in combination, developers can cover the entire spectrum of audio processing tasks, from real-time capture and playback to sophisticated analysis and feature extraction, facilitating the development of complex audio applications and systems. \ No newline at end of file