https://www.subcul-science.com/tags/audio-processing/ Recent content in Audio-Processing on サブカル科学研究会のブログ Hugo en Sat, 05 Jul 2025 21:05:51 +0900 https://www.subcul-science.com/post/20250705audio-volume-normalization-solution/ Sat, 05 Jul 2025 21:05:51 +0900 https://www.subcul-science.com/post/20250705audio-volume-normalization-solution/ <h2 id="audio-volume-issues-in-audio-file-processing">Audio Volume Issues in Audio File Processing</h2> <p>When producing and distributing audio content, do you face these problems?</p> <h3 id="1-volume-inconsistency-issues">1. Volume Inconsistency Issues</h3> <ul> <li><strong>Volume levels are not unified across multiple audio files</strong></li> <li>Volume differences occur due to different recording environments and equipment</li> <li>Listeners need to frequently adjust volume levels</li> </ul> <h3 id="2-quality-inconsistency-issues">2. Quality Inconsistency Issues</h3> <ul> <li><strong>Noise and unwanted frequencies are mixed in</strong></li> <li>Silent sections are too long and difficult to listen to</li> <li>Unable to achieve professional-quality audio</li> </ul> <h3 id="3-manual-processing-limitations">3. Manual Processing Limitations</h3> <ul> <li><strong>Processing large numbers of audio files individually is inefficient</strong></li> <li>Automation is difficult with GUI audio editing software</li> <li>Applying consistent processing standards is challenging</li> </ul> <h2 id="real-world-audio-quality-challenge-cases">Real-world Audio Quality Challenge Cases</h2> <h3 id="failure-case-limitations-of-manual-adjustment">Failure Case: Limitations of Manual Adjustment</h3> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"><span class="c1"># Traditional approach</span> </span></span><span class="line"><span class="cl"><span class="c1"># 1. Open each file in audio editing software</span> </span></span><span class="line"><span class="cl"><span class="c1"># 2. Visually and auditorily adjust levels</span> </span></span><span class="line"><span class="cl"><span class="c1"># 3. Manually apply noise reduction</span> </span></span><span class="line"><span class="cl"><span class="c1"># 4. Manually cut silent sections</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Problems:</span> </span></span><span class="line"><span class="cl"><span class="c1"># - Time-consuming for processing large numbers of files</span> </span></span><span class="line"><span class="cl"><span class="c1"># - Processing standards are subjective and inconsistent</span> </span></span><span class="line"><span class="cl"><span class="c1"># - Quality variations due to human errors</span> </span></span></code></pre></div><p>The solution to this problem is <strong>automated volume normalization with ffmpeg</strong>.</p>