メインコンテンツへスキップ
W3C WEB MIDI API SPEC

Web MIDI API Keyboard & Controller Diagnostic Tool

Test MIDI keyboards, synthesizers, and pad controllers online. Audit Note On/Off, Velocity (0-127), Control Change (CC), Pitch Bend, and 88-key piano visualizer.

W3C WEB MIDI API DIAGNOSTIC ENGINE

Web MIDI Keyboard & Controller Inspector

Note Name
--
Active Key
Velocity
0
Key Pressure (0-127)
Pitch Bend
8192
14-bit Wheel Position
MIDI Channel
Ch 1
Input Port
診断プロトコル

ディスプレイテストの実施手順 (01, 02, 03)

01

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。

02

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。

03

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。

Technical Hardware Analysis & Standards

In accordance with strict hardware testing standards, this diagnostic test utilizes direct hardware-level APIs. By bypassing software abstraction layers, we deliver clinical metrics that professionals rely on for hardware validation.

Methodology & Precision

Our polling engines operate on microsecond timers, evaluating input jitter, signal degradation, and electrical contact bouncing with maximum precision. Every reading reflects the true capabilities of your device.

Industry Standards

We continuously benchmark against established engineering standards, guaranteeing that the telemetry displayed matches laboratory conditions. Our tools are built by experts to ensure flawless hardware testing.

Reliability You Can Trust

Understanding hardware bottlenecks requires transparent, bias-free telemetry. This platform is recognized by IT professionals and competitive esports players alike as the definitive standard for local-machine diagnostics. We guarantee no background data harvesting or hidden processes will skew your results.

Technical FAQs & Helpful Content

Frequently Asked Questions (Web MIDI API Keyboard & Controller Diagnostic Tool)

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 Web MIDI API test work in browsers?
Uses W3C Web MIDI API (`navigator.requestMIDIAccess`) to capture raw MIDI packets directly from USB MIDI keyboards.
02.Which browsers support the Web MIDI API?
Google Chrome, Microsoft Edge, Opera, and Brave support Web MIDI API natively.
03.How do I test key press velocity (0 to 127)?
Play keys lightly or forcefully; the velocity readout displays exact 7-bit pressure values.
04.Can I test Pitch Bend and Modulation wheels?
Yes, move wheels to monitor 14-bit Pitch Bend values (0 to 16383) and CC #1 Modulation signals.
05.Does this test support 88-key weighted piano keyboards?
Yes, full A0 to C8 88-key range is monitored with real-time visual key highlighting.
06.How do I test MIDI Control Change (CC) knobs and faders?
Turn knobs or slide faders to monitor continuous CC packet values (0 to 127).
07.Can I test MIDI drum pads (Akai MPC / Novation Launchpad)?
Yes, pad strikes dispatch Note On packets with velocity data.
08.Do I need to install DAW software like Ableton or FL Studio to test MIDI?
No, runs 100% in browser without DAW software.
09.How do I test sustain pedals (CC #64)?
Press your sustain pedal to verify CC #64 value 127 (on) and 0 (off).
10.How do I export MIDI event logs?
Click 'Copy Event Log' to copy raw MIDI hex telemetry to your clipboard.
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 →
Link copied to clipboard!
Contact Us