How do I test my monitor refresh rate (Hz) online?

Open this analyzer on the monitor you want to test. Our speedometer utilizes high-frequency requestAnimationFrame loops to measure precisely how many frames per second your graphic card sends to the monitor, registering 60Hz, 144Hz, 240Hz, or 360Hz.

Can I test my HDMI surround sound (5.1 or 7.1) channels in a browser?

Yes. This tool uses the Web Audio API to query your audio system's channel configuration and trigger spatial panning sweeps. It targets individual channels (Front Left, Center, Front Right, Surround) to verify HDMI audio routing.

Why is my 144Hz monitor showing as 60Hz?

Ensure your HDMI or DisplayPort cable supports 144Hz bandwidth. Additionally, verify that your operating system's Advanced Display settings and your GPU Control Panel (NVIDIA/AMD) have the refresh rate configured correctly to 144Hz.

What is the difference between HDMI 2.0 and HDMI 2.1?

HDMI 2.0 has an 18 Gbps bandwidth limit (capped at 4K @ 60Hz), while HDMI 2.1 supports up to 48 Gbps bandwidth, enabling 4K @ 120Hz, 8K @ 60Hz, dynamic HDR, eARC, and Variable Refresh Rate (VRR) gaming configurations.

HDMI & DisplayPort Screen Analyzer Video & Spatial Audio

Profile active video bandwidth speeds, measure real-time monitor refresh rate (Hz), detect multi-screen layouts, and run surround sound audio panning tests.

VIDEO PORTS SWEPT

1. Screen Refresh Rate (Hz) Speedometer

-- HZ

Estimated Display Update Speed

HDMI / DP Bandwidth Target Waiting for Hz measure...

2. Surround Sound Spatial Audio Routing

Verify that spatial surround sound is routed correctly through your HDMI/DisplayPort audio drivers to your external receiver or soundbar arrays.

3. Active Screen Placement Coordinates

Screen Width - px

Screen Height - px

Color Depth - Bit Depth

Device Pixel Ratio -

Multi-Display Placement API

Scanning API support...

4. Web Audio Channel Capabilities

Max Hardware Channels: - Channels

API Audio Sample Rate: - Hz

Decoder Compression: PCM Stereo/Surround

5. Video Profile Exporter

Gather all active coordinates, calculated screen Hz parameters, and Web Audio channel attributes to compile a diagnostic config report.

📚 Technical Diagnostic Guide

HDMI vs DisplayPort: How to Calibrate Refresh Rates, Colors & Spatial Surround Audio

High-definition monitors and gaming screens require massive connection bandwidth to display fluent resolutions and fast update cycles. Choosing the correct port interface (HDMI vs DisplayPort) and configuring system properties directly impacts your visual sharpness, input latency, and audio spatialization.

📺 Refresh Rates (Hz) and Digital Bandwidth Allocation

Refresh rate represents the number of times per second your monitor redraws its screen image (e.g. 60Hz = 60 times/sec). Achieving high refresh rates like 144Hz, 240Hz, or 360Hz requires matching cable specifications. For example, standard **HDMI 2.0** bandwidth is capped at 4K @ 60Hz. To unlock 4K @ 120Hz or 144Hz, a **DisplayPort 1.4** or **HDMI 2.1** cable is mandatory.

🔊 Multichannel Spatial Audio over Display Interfaces

HDMI and DisplayPort are not just video interfaces; they carry up to 8 channels of uncompressed LPCM audio (7.1 surround sound). When routing audio to home theater systems, eARC (Enhanced Audio Return Channel) over HDMI 2.1 facilitates uncompressed Dolby Atmos and DTS:X transmission, routing spatial panning sweeps to specific satellite speakers without sync delays.

🛠️ Troubleshooting Monitor Hz Capping and Input Lag

If your screen is stuck at 60Hz: first, ensure you are not using older passive converters or adapters that limit bandwidth. Second, check your Windows Advanced Display settings to confirm the refresh rate is set to your monitor's nominal capacity. Finally, try updating your GPU drivers to unlock proper custom resolutions and eliminate frame timing stutters.

❓ Frequently Asked Questions