[Python] 音声ファイルの音量を上げてみる by yasu

hive-101145 · @yasu · Oct 16 '20 (edited)

$13.03

[Python] 音声ファイルの音量を上げてみる

こんにちは、@yasuです。

車で音楽を聴くのために、Youtubeから音声のみをダウンロードしています。ただ、動画によって、音量が異なります。ほとんど同じですが、特に小さい動画の音声を大きくする方法を調べました。

### 環境
https://repl.it/ でもVisual Studio Codeでも可能です。
downloadフォルダを作成して、in.mp3ファイルをコピーしておきます。

## 音声ファイルの音量を上げてみる
dBFSを-6dBFSにする

### コード
```
from pydub import AudioSegment

# 
# 音量を変更する
# 
# 音声ファイルを読み込む
sourceAudio = AudioSegment.from_file("./download/in.mp3")
# max_dBFSを変更する
processedAudio = sourceAudio + (-1 * sourceAudio.max_dBFS) - 6
# 結果を出力
processedAudio.export("./download/out.mp3", format="mp3")
print(f"max_dBFSを{sourceAudio.max_dBFS}から{processedAudio.max_dBFS}に変更しました。")
```

### 動作結果
![image.png](https://files.steempeak.com/file/steempeak/yasu/1Fb2KEHT-image.png)

### 参考
24dBUを0dBFSとして使用すると仮定すると、dBFS、dBU、およびVUの関係
![image.png](https://files.steempeak.com/file/steempeak/yasu/BQsB6gaf-image.png)

https://www.audiorecording.me/what-is-the-difference-between-dbfs-vu-and-dbu-in-audio-recordings.html より抜粋

👍 upvu, gotogether, sct.krwp, mmmmkkkk311, ctime, kevinwong, acidyo, minamiyololife, yasu, allsale, bluesniper, ladybug146, tomoyan, marcosdk, curx, artistrising, sct.curator, pixelfan, allnews, make-a-whale, gopower, ufm.pay, comunidadactiva, realmankwon.scot, sergino, llobu, ernick, mcgome, tmps, crokkon, discohedge, ysm1360, alives, maliha24, inandout, ricardo306, youngtopia, realmankwon.cur, auc, krwp.abc

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