sox

import sox import os import subprocess input_file = "input_audio.wav" output_file = "output_processed.wav" # --- Pre-requisite Check: SoX command-line tool --- try: subprocess.run(["sox", "--version"], check=True, capture_output=True) except (subprocess.CalledProcessError, FileNotFoundError): print("WARNING: The SoX command-line tool is not found. Please install it first.") print(" (e.g., `sudo apt-get install sox` on Debian/Ubuntu, `brew install sox` on macOS)") # Exit or provide placeholder if SoX isn't installed. For quickstart, we'll print and continue # to show the Python API, but expect actual failure if SoX isn't present. # --- Generate a dummy input file if it doesn't exist --- if not os.path.exists(input_file): print(f"Generating dummy '{input_file}' for the example...") try: # Use SoX itself to create a 1-second sine wave file subprocess.run(["sox", "-n", input_file, "synth", "1", "sine", "440"], check=True) print(f"Successfully generated '{input_file}'.") except (subprocess.CalledProcessError, FileNotFoundError): print(f"Failed to generate '{input_file}'. Please ensure SoX is installed and accessible in PATH, or provide your own '{input_file}'.") # --- SoX Transformation Example --- if os.path.exists(input_file): # Initialize a Transformer object tfm = sox.Transformer() # Apply some audio effects tfm.trim(0.1, 0.9) # Trim from 0.1s to 0.9s tfm.set_output_format(rate=16000, channels=1) # Resample to 16kHz mono tfm.compand(attack=0.3, decay=0.8, soft_knee=6, threshold=-40, ratio=5) # Apply dynamic range compression # Build the output file. The 'build' method executes the SoX command. try: tfm.build(input_file, output_file) print(f"Transformation complete! Output saved to '{output_file}'.") print(f"Original file size: {os.path.getsize(input_file)} bytes") print(f"Processed file size: {os.path.getsize(output_file)} bytes") except sox.SoxError as e: print(f"Error during SoX transformation: {e}") except Exception as e: print(f"An unexpected error occurred: {e}") else: print("Skipping transformation: Input file not found.") # --- Clean up (optional) --- # if os.path.exists(output_file): # os.remove(output_file) # if os.path.exists(input_file): # os.remove(input_file)