SPÉCIFICATIONS AUDIO NUMÉRIQUES AES17

音響・オーディオ診断テスト - Display Test Online

Q: How do Bluetooth audio codecs (SBC, AAC, aptX, LDAC) differ in latency?

Standard SBC and AAC codecs introduce 150ms to 250ms of latency. aptX Low Latency (aptX-LL) cuts delay to ~30ms-40ms, while LC3 (Bluetooth LE Audio) targets ~20ms-30ms.

Q: Why do Bluetooth headphones lag behind video when playing games?

Video players can delay video frames to align with slow Bluetooth audio, but real-time interactive games cannot predict audio dispatch, exposing raw Bluetooth transmission delay.

Q: Does operating system audio processing add latency to headphones?

Yes. OS software spatial audio, system equalizers, and virtual surround processing add 10ms to 50ms of extra DSP buffer latency.

Q: How do I fix lip-sync delay on my TV or Bluetooth soundbar?

Enable 'Game Mode' or 'Low Latency Audio Pass-Through' in your TV audio settings, or adjust the AV Sync offset slider in your media player app.

Q: What is the AES17 audio measurement standard?

AES17 is the Audio Engineering Society standard for measuring digital audio equipment performance, including passband ripple, total harmonic distortion, and latency.

Q: Can web browser hardware acceleration affect audio latency?

Yes. Hardware acceleration allows the Web Audio API to schedule audio buffers directly on dedicated hardware audio threads, bypassing main thread CPU stutters.

Q: Why does USB wired audio have lower latency than 2.4GHz wireless dongles?

Direct USB wires transmit uncompressed PCM audio packet streams at 1000Hz USB polling rates with zero wireless packet retransmission overhead.

Q: Does sample rate (44.1kHz vs 48kHz vs 96kHz) impact latency?

Higher sample rates reduce buffer duration (e.g. 512 samples at 96kHz = 5.33ms vs 512 samples at 44.1kHz = 11.61ms), providing faster buffer updates.

Mesurez la latence des écouteurs Bluetooth, le retard des enceintes sans fil et la synchronisation labiale grâce aux horloges microseconde de l'API Web Audio.

WEB AUDIO SYNTHESIZER & SPECTRUM SCOPE

待機中

FREQ: 440 Hz|VOL: 80%

W3C WEB AUDIO API 48kHz

FREQUENCY SELECTOR440 Hz

OUTPUT GAIN / VOLUME80%

診断プロトコル

ディスプレイテストの実施手順 (01, 02, 03)

準備

画面の汚れを拭き取り、環境光自動調整をオフにして、ネイティブ解像度と最大リフレッシュレートに設定します。

実行

全画面モード (F11) に切り替え、コントロールバーを使って各種テストパターンを順に表示します。

評価

部屋を暗くし、異なる視野角からムラやドット抜け、残像を観察してガイドと照合します。

ハードウェアアーキテクチャ

液晶・有機ELパネル技術の比較

プロフェッショナルIPS (In-Plane Switching)

卓越した色再現性と視野角。リファレンスモニターに最適。暗所でのわずかなIPSグローが発生する場合があります。

ゲーミングIPS (Fast IPS / Nano IPS)

ゲーミング向けの高速リフレッシュレートと応答速度。ただしVAと比較して静的コントラスト比は控えめです。

VAパネル (Vertical Alignment)

引き締まった深みのある黒と高コントラスト (3000:1+)。湾曲モニターに多い一方、暗所での黒残像に注意が必要です。

OLED (有機EL) ＆ QD-OLED

自発光ピクセルによる完全な漆黒、超高速応答、無限のコントラスト。自動輝度制限 (ABL) の影響を受けます。

BENCHMARK MATÉRIEL AUDIO

Diagnostics Audio Avancés & Normes d'Ingénierie

Une reproduction haute fidélité exige des signaux de test cliniques et non compressés. Notre suite exploite l'API Web Audio pour contourner toute compression logicielle et envoyer des ondes pures directement à votre DAC.

Codecs Audio Bluetooth & Mesure de Latence

Les codecs SBC et AAC standards créent un décalage de 150ms à 250ms, provoquant un désynchronisme labial gênant. Notre test audiovisuel quantifie précisément le retard en millisecondes de votre liaison sans fil.

Technical FAQs & Helpful Content

FAQ Latence Audio & Synchronisation Labiale

この診断機器、校正手順、ディスプレイ技術規格について知っておくべきすべての情報。

01.How does the Audio Latency & Lip-Sync Test measure delay?

Our test engine triggers a high-contrast visual flash synchronized with an audio ping using Web Audio API AudioContext timestamps, allowing you to estimate audio-visual sync lag in milliseconds.

02.What is an acceptable audio latency for gaming and video playback?

Wired headphones achieve <10ms of latency (imperceptible). For wireless audio, latency under 40ms is ideal for gaming, while under 100ms is acceptable for lip-synced video streaming.

03.How do Bluetooth audio codecs (SBC, AAC, aptX, LDAC) differ in latency?

Standard SBC and AAC codecs introduce 150ms to 250ms of latency. aptX Low Latency (aptX-LL) cuts delay to ~30ms-40ms, while LC3 (Bluetooth LE Audio) targets ~20ms-30ms.

04.Why do Bluetooth headphones lag behind video when playing games?

Video players can delay video frames to align with slow Bluetooth audio, but real-time interactive games cannot predict audio dispatch, exposing raw Bluetooth transmission delay.

05.Does operating system audio processing add latency to headphones?

Yes. OS software spatial audio, system equalizers, and virtual surround processing add 10ms to 50ms of extra DSP buffer latency.

06.How do I fix lip-sync delay on my TV or Bluetooth soundbar?

Enable 'Game Mode' or 'Low Latency Audio Pass-Through' in your TV audio settings, or adjust the AV Sync offset slider in your media player app.

07.What is the AES17 audio measurement standard?

AES17 is the Audio Engineering Society standard for measuring digital audio equipment performance, including passband ripple, total harmonic distortion, and latency.

08.Can web browser hardware acceleration affect audio latency?

Yes. Hardware acceleration allows the Web Audio API to schedule audio buffers directly on dedicated hardware audio threads, bypassing main thread CPU stutters.

09.Why does USB wired audio have lower latency than 2.4GHz wireless dongles?

Direct USB wires transmit uncompressed PCM audio packet streams at 1000Hz USB polling rates with zero wireless packet retransmission overhead.

10.Does sample rate (44.1kHz vs 48kHz vs 96kHz) impact latency?

Higher sample rates reduce buffer duration (e.g. 512 samples at 96kHz = 5.33ms vs 512 samples at 44.1kHz = 11.61ms), providing faster buffer updates.

次にどのテストを行うべきかお困りですか？トラブルシューティングが必要ですか？

総合診断ガイドを読む →

PASS

SYNC AUDIO OPTIMALE

État de Latence A/V

12.4/ms

Retard Mesuré12.4 ms (Filaire)

Évaluation CodecImperceptible (< 40ms)

Métriques de Latence

Télémétrie Audiovisuelle

Sync AES17

Délai Audio-Visuel

12.4ms

Délai Codec Bluetooth

25.0ms

Tampon Matériel Audio

512samples

Générateur Lip-Sync

Réglages Flash & Bip

Controls

Tempo du Flash de Sync

Fréquence du Bip Audio

Shortcuts

Keyboard Navigation

Hotkeys

Space

Déclencher Flash & Bip de Sync

C

Calibrer le Retard de Réaction

R

Réinitialiser la Télémétrie

TV users can navigate with D-Pad & Remote arrow keys