Sonic Refiner

Adaptive Audio Enhancement DSP for foobar2000

Sonic Refiner adjusts tone and soundstage in real time. It combines low-frequency body, clarity, stereo width, short early reflections, Master Strength, Adaptive Tone Balance, output gain, lightweight headroom protection, and level-matched comparison in one DSP component.

Current stable release: v0.6.2

What is new in v0.6.2

This development build fixes the Built-in Presets combo display so it reflects the built-in preset that exactly matches the currently restored DSP settings. If the current settings do not exactly match any built-in preset, the combo is left unselected rather than incorrectly showing Standard.

This does not change DSP processing, ATB behavior, built-in preset values, SRP4, or preset_version 9.

What is new in v0.6.1

Clear ATB analysis status on playback changes

v0.6.1 improves the Adaptive Tone Balance status display so values from the previous playback position are not mistaken for fresh analysis results.

• Playback start, Next, Previous, direct track jumps, natural track changes, seeks, Stop -> playback, and ATB Off -> On show 自動補正：解析中... / Auto: Analyzing... while fresh analysis is being accumulated
• After sufficient fresh analysis, the normal Auto Low / Auto High numeric status returns
• Pause / Resume preserves the current analysis state and does not restart analysis
• A runtime-only playback discontinuity generation makes new-track and seek resets reliable

Compatibility

• No DSP or Adaptive Tone Balance decision-algorithm changes from v0.6.0
• Auto Low / Auto High limits remain +10.0 dB
• SRP4 remains the user-preset / .srpbackup format
• preset_version 9 remains the DSP preset format
• All 12 built-in presets remain unchanged
• Legacy preset / backup compatibility is unchanged
• Runtime analyzer history and live Auto Low / Auto High values remain non-persistent

What is new in v0.6.0

Adaptive Standard built-in preset

v0.6.0 adds one built-in preset designed to make full practical use of Adaptive Tone Balance (ATB) without changing the validated v0.5.0 ATB algorithm.

• Added Adaptive Standard / 適応型標準 as the 12th built-in preset
• Depth: 100
• Clarity: 100
• Width: 50
• Ambience: 40
• Master Strength: 100%
• Output Gain: 0.0 dB
• Auto Headroom Protection: On
• Level-Matched Bypass: On
• Sonic Refiner: Enabled
• Adaptive Tone Balance: On
• With ATB On, Depth and Clarity act as maximum permissions, so Auto Low / Auto High can use the full allowed range up to +10.0 dB each when the source analysis calls for it
• Width and Ambience keep the existing Standard preset values, avoiding an unnecessarily extreme soundstage
• The existing 11 built-in presets remain unchanged and still load ATB Off

UI refinement

• Widened the Depth and Clarity value fields so Japanese ATB limit text such as 100% / 自動上限 +10.0 dB is fully visible
• Settings window remains 560 × 320

Compatibility

• No DSP or Adaptive Tone Balance algorithm changes from v0.5.0
• DSP write format remains preset_version 9
• User preset / .srpbackup write format remains SRP4
• SRP1 / SRP2 / SRP3 / SRP4 and legacy DSP preset reading remain supported
• Runtime analyzer history, Auto Low / Auto High values, and confidence remain non-persistent
• A/B, Cancel, direct settings access, Japanese/English UI, and existing protection behavior are unchanged

What is new in v0.5.0

Adaptive Tone Balance

v0.5.0 adds optional Adaptive Tone Balance (ATB) while preserving the v0.4.0 fixed Depth/Clarity behavior whenever ATB is Off.

• Adaptive Tone Balance is Off by default
• Analysis uses the original signal before Sonic Refiner processing
• Auto Low compares Bass 60–180 Hz with Body 200–500 Hz
• Low decision target: Bass/Body +6.5 dB
• Auto Low processing preserves the dry signal and adds a parallel filtered 60–180 Hz Bass component
• Auto High uses High/Mid balance (3.5–10 kHz vs 300 Hz–2.0 kHz) together with Treble/Presence balance (5–10 kHz vs 2–5 kHz) to choose correction strength
• High/Mid shortage reference remains -6 dB with a 1.5 dB tolerance
• Automatic correction is boost-only; ATB does not perform automatic cuts
• Auto Low absolute maximum: +10.0 dB
• Auto High absolute maximum: +10.0 dB
• When ATB is On, Depth and Clarity become maximum permissions for automatic correction rather than fixed boost amounts
• Master Strength continues to scale the resulting Depth/Clarity effect
• Slow rolling analysis and gain movement are used to reduce audible pumping
• Very low input below approximately -55 dBFS does not update analysis
• Track changes, seeks, Stop, and ATB Off→On transitions restart analysis; Pause/Resume preserves it
• Multichannel analysis uses the first L/R pair
• The normal public UI shows current Auto Low / Auto High correction without development diagnostics

Presets, compatibility, and A/B

• Existing 11 built-in presets remain unchanged and load ATB Off
• Existing built-in presets can be used normally; enable ATB afterward when automatic correction is wanted
• User presets store the ATB On/Off state
• User-preset / .srpbackup write format: SRP4
• foobar2000 DSP preset write format: preset_version 9
• SRP1 / SRP2 / SRP3 and DSP preset versions 1–8 remain readable
• Legacy data that has no ATB field loads with ATB Off
• A/B slots store ATB On/Off in addition to Depth, Clarity, Width, Ambience, and Master Strength
• A/B analyzer state and live automatic-gain state are runtime-only and are not persisted
• Ending A/B comparison restores the full settings that were active when comparison began

Release-candidate validation

The v0.5.0 release candidate was checked for:

• Light and Dark mode
• continuous playback
• restart persistence
• Cancel behavior
• ATB On/Off user presets and SRP4 backup restore
• SRP3 legacy import behavior
• A/B ATB switching and pre-comparison restoration
• fresh ATB analysis after restart and after Off→On

What is new in v0.4.0

Direct settings access

• Open Playback → Sonic Refiner Settings... to configure the single active Sonic Refiner instance without going through DSP Manager.
• The direct window is modeless and owned by foobar2000: foobar2000 remains usable, the window stays above foobar2000, and unrelated applications can still appear above it.
• The command is also available in Preferences → Keyboard Shortcuts. No default key binding is assigned.
• If Sonic Refiner is absent from the active DSP chain or appears more than once, direct editing is refused for safety.
• The conventional DSP Manager configuration path remains available.

v0.4.0 adds temporary A/B comparison slots and direct settings access from the Playback menu.

• Store Depth, Clarity, Width, Ambience, and Master Strength in A or B
• Listen to A or B instantly without changing Output Gain or protection settings
• End Comparison restores the full settings that were active before comparison began
• A/B slots are not written to DSP presets, user presets, or .srpbackup files
• A/B slots remain available while foobar2000 is running and are cleared after restart
• Japanese and English UI are both supported

What is new in v0.3.0

• Japanese and English user interface
• Instant language switching without restarting foobar2000
• First-run language selection based on the Windows display language
• The selected language is remembered independently of DSP presets
• Built-in preset names, buttons, status text, messages, file dialogs, Help, Glossary, Important Notes, and License pages are localized
• English-first public documentation

The DSP processing algorithm is unchanged from v0.2.0.

Main features

• Depth: low-shelf enhancement around 120 Hz, up to approximately +16 dB
• Clarity: high-shelf enhancement above approximately 3.5 kHz, up to approximately +14 dB
• Adaptive Tone Balance: source-dependent boost-only Low/High correction using Bass/Body plus H/M + T/P analysis
• Width: Mid/Side widening with protection below approximately 180 Hz, up to Side 600%
• Ambience: short early reflections around 11 ms and 19 ms, up to 85% Wet Mix
• Master Strength: scales Depth, Clarity, Width, and Ambience together from 0% to 100%
• Output Gain: -12.0 dB to +6.0 dB in 0.5 dB steps
• Auto Headroom Protection: lightweight block/sample-peak protection around -0.2 dBFS
• Level-Matched Bypass: reduces average level added by processing for fairer comparison
• Twelve built-in presets
• Up to 20 UTF-8 user presets
• User-preset export and import with .srpbackup files
• Integrated Help, Glossary, Important Notes, and MIT License pages
• foobar2000 light and dark mode support

Built-in presets

English	Japanese
Standard	標準
Bass Boost	低域強化
Vocal Focus	ボーカル重視
Wide	ワイド
Live	ライブ
Headphones	ヘッドホン
Extreme Bass	超低域強化
Extreme Clarity	超明瞭
Extreme Wide	超ワイド
Large Hall	大ホール
Full Boost	フルブースト
Adaptive Standard	適応型標準

Only the displayed names change with the UI language. Preset values and internal order remain unchanged.

Processing order

Adaptive Tone Balance analysis (original input, when enabled)
→ Depth / adaptive low correction
→ Clarity / adaptive high correction
→ Width
→ Ambience
→ effective amount controlled by Master Strength
→ Level Match
→ Output Gain
→ Automatic Headroom Protection

Recommended DSP order

Sonic Refiner
→ R128 Real-time Loudness Normalizer
→ Output

Sonic Refiner handles tone and soundstage. The downstream R128 Real-time Loudness Normalizer handles final loudness management, True Peak protection, and limiting.

Language behavior

• Japanese Windows display language: Japanese by default
• Other Windows display languages: English by default
• Change the language from the selector at the top of the settings window
• The open settings window updates immediately
• Audio processing is not restarted or reinitialized
• Slider values, current sound settings, and user-preset names are not changed
• The language setting is not stored in DSP presets, user presets, or .srpbackup files
• Cancel restores sound settings as before, but does not undo a language change

Installation

1. Double-click foo_sonic_refiner_v0.6.0.fb2k-component.
2. Apply the component installation in foobar2000.
3. Restart foobar2000.
4. Add Sonic Refiner from DSP Manager.

Basic operation

1. Load the Standard built-in preset.
2. Adjust Depth, Clarity, Width, and Ambience.
3. Optionally enable Adaptive Tone Balance. When enabled, Depth and Clarity become automatic-correction limits.
4. Use Master Strength to adjust the overall amount while preserving the balance.
5. Adjust Output Gain when necessary.
6. Save the result as a user preset.

Suggested ranges

• 0–60%: normal adjustment range
• 60–80%: strong enhancement range
• 80–100%: extreme effects and testing

Compatibility

• Windows x64
• Visual Studio 2022
• foobar2000 SDK 2025-03-07
• C++17
• DSP write format is preset_version 9
• User-preset write format is SRP4
• Reads SRP1, SRP2, SRP3, and SRP4
• Reads legacy DSP preset versions 1–8; Adaptive Tone Balance defaults to Off for legacy data
• Legacy settings without Master Strength load at 100%
• Legacy settings without Output Gain load at 0.0 dB
• Existing UTF-8 user-preset names are preserved and are not translated
• .srpbackup remains the backup extension; v0.6.0 imports older backups and new backups carry SRP4 user-preset data

Building from source

Required:

• Visual Studio 2022
• foobar2000 SDK 2025-03-07
• WTL
• Windows x64

Place the project at:

F:\foobar2000-dev\SDK-2025-03-07\foobar2000\foo_sonic_refiner

Confirm that WTL includes:

F:\foobar2000-dev\WTL\Include\atlapp.h

Run:

build_and_package.cmd

Output:

dist\foo_sonic_refiner_v0.6.0.fb2k-component
dist\SHA256SUMS.txt

See README_FIRST.txt for detailed build steps and TESTING_v0.6.0.md for the final release validation checklist.

Safety notes

• Values above 80% are not intended as a natural everyday adjustment range.
• Strong Depth can increase the load on speakers, subwoofers, and amplifiers.
• Strong Clarity can emphasize sibilance, cymbals, noise, and distortion.
• Strong Width can reduce center stability and mono compatibility.
• Strong Ambience can create separated echoes, distance, or muddiness.
• Auto Headroom Protection is not a True Peak limiter.
• Lower the playback volume before testing extreme settings.

License

MIT License

Copyright (c) 2026 Maximum

See LICENSE.txt. foobar2000 and the foobar2000 SDK remain subject to their respective rights and terms. See THIRD_PARTY_NOTICES.txt.

Clean-room statement

This project is an independent clean-room implementation. It does not include or use Winamp Enhancer 017 source code, DLLs, images, presets, settings data, or other assets.

---

日本語

Sonic Refinerは、音色と音場をリアルタイムで調整するfoobar2000用DSPコンポーネントです。低域の厚み、明瞭感、ステレオの広がり、短い初期反射による空間・奥行き感、Master Strength、出力ゲイン、軽量な保護、レベルを合わせた比較を1つの設定画面にまとめています。

現在の正式公開版：v0.6.0

v0.6.0の変更点

「適応型標準」内蔵プリセット

v0.6.0では、v0.5.0で確定した適応型音色補正（ATB）のアルゴリズムを変更せず、 ATBを最大限利用するための内蔵プリセットを1種類追加しました。

• 12個目の内蔵プリセットとして 「適応型標準 / Adaptive Standard」 を追加
• Depth：100
• Clarity：100
• Width：50
• Ambience：40
• Master Strength：100%
• Output Gain：0.0 dB
• 自動ヘッドルーム保護：オン
• レベルマッチ・バイパス：オン
• Sonic Refiner：有効
• 適応型音色補正：オン
• ATB ON時はDepth／Clarityが自動補正の上限になるため、解析結果に応じてAuto Low／Auto Highがそれぞれ最大 +10.0 dB まで利用可能
• Width／Ambienceは既存「標準」と同じ値を維持し、音場だけが極端にならない構成
• 既存11種類の内蔵プリセットは変更せず、引き続き呼び出し時は ATB OFF

UI調整

• 100% / 自動上限 +10.0 dB など、日本語のATB上限表示が右端で切れないようDepth／Clarityの値表示欄を調整
• 設定画面サイズは 560 × 320 のまま

互換性

• v0.5.0からDSP／ATBアルゴリズム変更なし
• DSP書き込み形式は preset_version 9 のまま
• 任意プリセット／.srpbackup書き込み形式は SRP4 のまま
• SRP1／SRP2／SRP3／SRP4と旧DSP presetの読み込み互換性を維持
• analyzer history／Auto Low／Auto High／confidenceは引き続き保存しない
• A/B、Cancel、直接起動、日本語／English、既存の保護動作は変更なし

v0.5.0の変更点

適応型音色補正 (Adaptive Tone Balance)

v0.5.0では任意で有効にできる**適応型音色補正（ATB）**を追加しました。 ATBがオフのときは、v0.4.0までの固定Depth／Clarity動作をそのまま維持します。

• 適応型音色補正の初期値はオフ
• Sonic Refiner処理前の原音を解析
• Auto LowはBass 60～180 Hz とBody 200～500 Hz を比較
• Low判定目標：Bass/Body +6.5 dB
• Auto Lowは原音を残したまま、フィルターした 60～180 Hz のBass成分を並列加算
• Auto HighはHigh/Mid（3.5～10 kHz 対 300 Hz～2.0 kHz）に加え、Treble/Presence（5～10 kHz 対 2～5 kHz）も使って補正量を決定
• High/Mid不足判定の基準は -6 dB、許容範囲は 1.5 dB
• 自動補正は不足分のブーストのみで、自動カットは行わない
• Auto Low絶対上限：+10.0 dB
• Auto High絶対上限：+10.0 dB
• ATB ON時のDepth／Clarityは固定補正量ではなく、自動補正に許可する上限
• Master Strengthは自動補正にも適用
• ゆっくりしたローリング解析と追従で、不自然なポンピングを抑制
• 約 -55 dBFS 未満の極小音では解析を更新しない
• 曲変更・シーク・Stop・ATB OFF→ONで解析をやり直し、Pause/Resumeでは保持
• マルチチャンネル解析は最初のL/Rを使用
• 通常UIでは現在の自動補正：低域 / 高域だけを表示し、開発用診断値は表示しない

プリセット・互換性・A/B

• 既存11種類の内蔵プリセットは変更せず、呼び出し時はATB OFF
• 既存プリセットをそのまま使い、必要なときだけATBをONにして使用可能
• 任意プリセットにはATBのON/OFFも保存
• 任意プリセット／.srpbackup書き込み形式：SRP4
• foobar2000 DSP preset書き込み形式：preset_version 9
• SRP1／SRP2／SRP3、旧DSP preset version 1～8を引き続き読み込み可能
• ATB項目を持たない旧データはATB OFFとして読み込む
• A/BにはDepth／Clarity／Width／Ambience／Master Strengthに加えてATB ON/OFFも保存
• A/Bの解析履歴や現在の自動補正量は保存しない
• 「比較終了」で比較開始直前の全設定へ復元

リリース候補で確認した項目

• Light / Dark表示
• 連続再生
• 再起動後の設定保持
• キャンセル動作
• ATB ON/OFFを含む任意プリセットとSRP4バックアップ
• 旧SRP3読み込み
• A/BでのATB切替と比較開始前状態への復元
• 再起動後／ATB OFF→ON後の新規解析

v0.4.0の変更点

設定画面の直接起動

• Playback → Sonic Refiner の設定... から、DSP Managerを経由せずActive DSPs内の1個のSonic Refinerを直接設定できます。
• 直接起動画面はモードレスでfoobar2000に所有され、画面を開いたままfoobar2000本体を操作できます。別アプリは通常どおり前面に出せます。
• Preferences → Keyboard Shortcuts から任意のショートカットキーを割り当てられます。初期割り当てはありません。
• Sonic RefinerがDSPチェーンにない場合、または複数登録されている場合は、安全のため直接編集を開始しません。
• 従来のDSP Manager経由の設定方法もそのまま利用できます。

v0.4.0では、一時的なA/B比較スロットとPlaybackメニューからの設定画面直接起動を追加しました。

• Depth、Clarity、Width、Ambience、Master StrengthをA/Bへ保存
• Output Gainや保護設定を変えずにA/Bを即時試聴
• 「比較終了」で比較開始直前の全設定へ復元
• A/B内容はDSP preset、任意プリセット、.srpbackupへ保存しない
• A/Bスロットはfoobar2000起動中のみ保持し、再起動後は空に戻る
• 日本語／Englishの両方に対応

v0.3.0の変更点

• 設定画面の日本語／英語切り替え
• foobar2000を再起動せず、その場で表示を切り替え
• 初回はWindowsの表示言語を判定
• 選択した言語を音質設定とは別に保存
• 内蔵プリセット名、ボタン、状態表示、確認・エラー表示、ファイル選択、ヘルプ、用語集、注意事項、ライセンスを英語化
• README等を英語先・日本語後の構成へ変更

DSP処理アルゴリズムはv0.2.0から変更していません。

主な機能

• Depth：約120 Hzを中心とするLow Shelf、最大約+16 dB
• Clarity：約3.5 kHz以上のHigh Shelf、最大約+14 dB
• 適応型音色補正：Bass/BodyとH/M＋T/P解析による音源依存のブースト型Low／High自動補正
• Width：約180 Hz以下を保護するMid/Side方式、Side最大600%
• Ambience：約11 ms・19 msの短い初期反射、Wet Mix最大85%
• Master Strength：4つの補正効果を0～100%で一括調整
• Output Gain：-12.0～+6.0 dB、0.5 dB刻み
• 自動ヘッドルーム保護：約-0.2 dBFS付近の軽量なブロック／サンプルピーク保護
• レベルマッチ・バイパス：処理による平均音量増加分を抑えた比較
• 内蔵プリセット12種類
• UTF-8任意プリセット最大20件
• .srpbackupによる書き出し・読み込み
• ヘルプ・用語集・注意事項・MIT License
• ライト／ダークモード対応

言語切り替えの動作

• Windowsの表示言語が日本語：初期表示は日本語
• それ以外：初期表示はEnglish
• 設定画面上部の選択欄から変更
• 開いている設定画面を即時更新
• DSPの再作成・再初期化は行わない
• スライダー値、現在の音質設定、任意プリセット名は変更しない
• 言語設定はDSP preset、任意プリセット、.srpbackupへ保存しない
• キャンセル時は従来どおり音質設定を戻すが、言語変更は戻さない

内部処理順序

適応型音色補正の解析（ON時・処理前原音）
→ Depth / 自動低域補正
→ Clarity / 自動高域補正
→ Width
→ Ambience
→ Master Strengthによる実効効果量
→ Level Match
→ Output Gain
→ Automatic Headroom Protection

推奨DSP順序

Sonic Refiner
→ R128 Real-time Loudness Normalizer
→ Output

互換性

• DSP書き込み形式はpreset_version 9
• 任意プリセット書き込み形式はSRP4
• SRP1／SRP2／SRP3／SRP4を読み込み可能
• 旧DSP preset version 1～8を読み込み可能。旧データでは適応型音色補正はオフ
• Master Strengthを持たない旧設定は100%
• Output Gainを持たない旧設定は0.0 dB
• 既存の日本語名を含む任意プリセット名は翻訳せず維持
• .srpbackup拡張子とバックアップヘッダーは維持し、旧バックアップを読み込み可能。新規バックアップの任意プリセット内容はSRP4

ビルド

配置先：

F:\foobar2000-dev\SDK-2025-03-07\foobar2000\foo_sonic_refiner

WTL確認先：

F:\foobar2000-dev\WTL\Include\atlapp.h

次を実行します。

build_and_package.cmd

出力：

dist\foo_sonic_refiner_v0.6.0.fb2k-component
dist\SHA256SUMS.txt

詳しい手順はREADME_FIRST.txt、正式版の最終確認項目はTESTING_v0.6.0.mdを参照してください。