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Sonic Refiner v0.8.4

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@Maximum0303 Maximum0303 released this 04 Oct 01:14
· 9 commits to main since this release
v0.8.4
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Sonic Refiner v0.8.4

Auto Headroom Protection

  • Replaced immediate block-peak attenuation with smoothed sustained-peak protection.
  • Uses a fast peak envelope followed by a slower sustained-peak envelope.
  • Brief transients normally pass without pulling down the whole signal.
  • Sustained high peaks around the existing approximately -0.2 dBFS reference are attenuated gradually.
  • Protection gain now uses a smooth attack and release, reducing audible level steps and pumping.
  • Auto Headroom remains lightweight protection, not a True Peak limiter; final True Peak management remains the downstream R128 Real-time Loudness Normalizer's responsibility.

Validation

  • The previously affected quiet / ballad passage with Adaptive Standard and ATB no longer showed the audible small abrupt level drop attributed to Auto Headroom.
  • The same passage remained normal with Level-Matched Bypass re-enabled.
  • Louder / denser material passed without abrupt level drops, audible pumping, clipping-like distortion, or unstable gain movement.
  • Full Boost with ATB Off, Level-Matched Bypass On, and Auto Headroom On also passed without clipping-like distortion or abrupt level drops.

Compatibility

  • Auto Headroom behavior is intentionally changed.
  • ATB behavior is unchanged.
  • Level-Matched Bypass, Depth / Clarity gain ceilings, Width, Ambience, Reverb, Master Strength, Output Gain, built-in preset values, SRP5, preset_version 10, .srpbackup, display-language behavior, and legacy compatibility are unchanged from v0.8.3.

Recommended DSP order

Sonic Refiner → R128 Real-time Loudness Normalizer → Output

Sonic Refiner v0.8.4

自動ヘッドルーム保護

  • 瞬間的なブロックピークへの即時減衰をやめ、平滑化した持続ピーク保護へ変更。
  • 高速ピーク包絡と、それを受ける遅い持続ピーク包絡の2段階で検出。
  • 短いトランジェントでは原則として全体ゲインを下げない。
  • 従来の約-0.2 dBFS基準付近を持続的に超える高ピークだけを穏やかに減衰。
  • 保護ゲインの低下／復帰を滑らかにし、「ガクッ」とした音量低下やポンピングを抑制。
  • True Peakリミッターではなく、最終True Peak管理は後段のR128 Real-time Loudness Normalizerが担当。

検証

  • 適応型標準／ATBで症状が出ていた静かな曲・バラードの同一箇所で、自動ヘッドルーム保護による微妙な急低下が改善。
  • レベルマッチ・バイパスをONへ戻した状態でも問題なし。
  • 音圧が高めの曲でも、急な音量低下、不自然なポンピング、クリップ感、ゲイン不安定なし。
  • フルブースト、ATB OFF、レベルマッチ・バイパスON、自動ヘッドルーム保護ONでも音割れ・急な音量低下なし。

互換性

  • Auto Headroomの動作だけを意図的に変更。
  • ATBの動作は変更なし。
  • レベルマッチ・バイパス、Depth / Clarity上限、Width、Ambience、Reverb、Master Strength、Output Gain、内蔵プリセット値、SRP5、preset_version 10、.srpbackup、表示言語、旧形式互換はv0.8.3から変更なし。

推奨DSP順序

Sonic Refiner → R128 Real-time Loudness Normalizer → Output

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