Audio Latency Test Online Free Browser-Based Audio Delay Measurement Tool

This test runs entirely in your browser — no download or install needed. It plays a steady kick drum at 120 beats per minute and asks you to tap the moment you hear each beat. Each tap is matched to the beat that played at the same moment — so even high Bluetooth delay (seconds, not milliseconds) is measured correctly. The result is a trailing average of your last 10 taps.

1. Tap Tap here to start. You'll get a short ready period, then a 3-2-1 countdown.
2. When the beat starts, tap (or press Space) every time you hear it through your headphones or speakers.
3. After a few taps, the average stabilizes. The number shown in milliseconds is your audio latency.
4. The Correction reading helps when delay is very high — it shows what your latency would be if you missed the first beat entirely.

Tip: For the most accurate Bluetooth audio latency test, set your Bluetooth device as the active system audio output before starting. For a wired headphone test, plug in your headphones and select them in system sound settings.

Audio latency is the measurable time delay, expressed in milliseconds (ms), between when a digital audio signal is generated by your device and when the sound waves reach your ears. Every component in the audio signal chain contributes to this delay: the operating system's audio engine, the audio driver, the digital-to-analog converter (DAC), the amplifier, and finally the physical transducer (speaker or headphone driver).

Unlike visual latency (monitor response time), audio latency has a direct physical consequence on human performance. The brain's auditory cortex synchronizes motor actions to audio cues — which is why a drummer playing to a click track with 30ms of audio latency will progressively rush or drag their timing. This same principle applies to rhythm game players, live performers, and musicians recording with in-ear monitoring.

How Much Audio Latency Is Noticeable?

Latency	Rating	Best For
< 10ms	Excellent	Studio recording, live performance monitoring, professional audio interfaces
10–20ms	Very Good	Rhythm games (osu!, Beat Saber), professional gaming headsets, wired USB audio
20–40ms	Good	Casual gaming, video conferencing, general music listening
40–100ms	Acceptable	Passive listening, video streaming; perceptible but tolerable for non-critical tasks
100–200ms	High	Clearly noticeable echo during calls; video sync issues; typical of Bluetooth SBC codec
> 200ms	Very High	Unusable for real-time tasks; some standard Bluetooth SBC implementations

What Is Low Latency Audio?

Low latency audio refers to audio systems engineered to deliver sound with less than 20ms end-to-end delay. The major low-latency audio technologies in use today are: ASIO on Windows, Core Audio on macOS and iOS, AAudio on Android 8.0+, JACK on Linux for real-time professional audio, and Bluetooth LE Audio with the LC3 codec for wireless devices targeting sub-40ms latency.

Audio Latency vs. CAS Latency — Key Difference

CAS latency (Column Address Strobe latency) is a RAM timing specification measuring how many clock cycles your memory takes to respond to a data request — typically 14–40 clock cycles. It has no direct relationship to audio latency. When building a low-latency audio workstation, audio buffer size (in samples) and driver architecture matter far more than RAM CAS latency.

Bluetooth audio latency is determined almost entirely by the codec negotiated between your transmitting device and your headphones. Unlike wired connections where latency is governed by the audio driver buffer, Bluetooth must encode the PCM audio, transmit it over radio, buffer it for transmission jitter, decode it, and play it through the DAC — each stage adding latency.

Bluetooth Codec Latency: Measured Values

Codec	Latency (typical)	Availability	Use Case
SBC	150–250ms	Universal (all BT devices)	Fallback only — avoid for gaming/music
AAC	100–180ms	Apple devices, modern Android	Streaming; decent for casual use
aptX	60–80ms	Qualcomm-equipped devices	Better for music, marginal for gaming
aptX Low Latency	~32ms	Select Qualcomm devices (older)	Gaming, music apps
aptX Adaptive	50–80ms (game mode: ~50ms)	Flagship Android + select TWS	Adaptive bitrate; gaming mode available
LDAC	~100ms	Sony devices, Android 8.0+	Hi-res audio quality; not low latency
LC3 (LE Audio)	< 40ms	Bluetooth 5.2+ devices (2023+)	Next-gen standard; lowest wireless latency
2.4GHz RF (proprietary)	15–40ms	Gaming headsets (SteelSeries, Logitech G)	Best wireless option for gaming

How to Run a Bluetooth Audio Latency Test Online

Connect your Bluetooth headphones and set them as the system audio output. Open this page, click Start Test, and tap on every beat you hear. The tool measures the real time difference between each scheduled beat and your tap, giving you your device's actual Bluetooth codec delay. Run 10+ taps for a reliable average.

Bluetooth LE Audio Latency Test

Bluetooth LE Audio (Bluetooth 5.2+) uses the LC3 codec and Multi-Stream Audio architecture to target end-to-end latency under 40ms — a significant improvement over classic Bluetooth codecs. As of 2025–2026, LE Audio is supported on Google Pixel 8 and newer, Samsung Galaxy S24 series, and select TWS earbuds including Samsung Galaxy Buds3 Pro.

Windows Audio Latency Test (Windows 10 & 11)

Windows audio latency is primarily determined by your audio driver and whether the application uses WASAPI shared mode or exclusive mode. In WASAPI shared mode (the default), the Windows Audio Session API mixes audio from multiple apps, adding 10–30ms buffer on top of hardware latency. In WASAPI exclusive mode, the application takes direct control of the audio hardware, reducing total latency to 2–5ms. For the absolute lowest Windows audio latency, ASIO drivers (ASIO4ALL for consumer hardware) bypass the Windows audio stack entirely. Use this browser test with your target device selected, or run LatencyMon to diagnose DPC latency from kernel drivers.

Linux Audio Latency Test

Use this page in Chrome or Firefox for a quick baseline on Linux. Linux audio latency depends on your audio server: ALSA provides the lowest latency (under 5ms with optimized buffers), PulseAudio adds 50–100ms, and PipeWire targets 10–20ms with full compatibility. For advanced diagnostics: jack_iodelay for JACK loopback measurement, or pw-top for PipeWire latency monitoring.

Android Audio Latency Test

Android's audio latency has improved dramatically since the introduction of AAudio in Android 8.0 (Oreo). Modern flagship Android devices achieve round-trip latency under 20ms with wired output. For testing, use this browser test in Chrome on Android with wired headphones. On Android, enabling Developer Options → Bluetooth Audio Codec → aptX or LDAC reduces wireless latency versus the default SBC.

Mac Audio Latency Test

macOS uses Core Audio, Apple's native low-latency audio framework, which consistently delivers some of the lowest system audio latency of any desktop OS — typically 5–15ms at default buffer sizes. Apple Silicon Macs with the built-in speaker achieve approximately 10ms. Use this browser tool in Safari or Chrome to measure your current Mac audio output latency.

Steam Deck Audio Latency Test

The Steam Deck runs SteamOS 3 with PipeWire as its audio server. Built-in speaker latency is typically 20–30ms. Wired headphone latency via the 3.5mm jack is similar (15–25ms). Bluetooth audio on the Steam Deck shows typical codec-dependent latency: SBC at 150–200ms, aptX at 60–80ms if supported.

Audio Interface Latency Test

Dedicated audio interfaces (Focusrite Scarlett, UA Apollo, RME Babyface, MOTU M2) achieve the lowest latency of any consumer audio device. At 64-sample buffer size and 48kHz, a Focusrite Scarlett 2i2 achieves approximately 1.3ms round-trip latency. This browser test measures your audio interface's output latency through the system audio stack.

For gaming, audio latency is not just about comfort — it directly affects gameplay performance. Rhythm games require precise synchronization between audio and input; first-person shooters depend on audio cues for positional awareness. Even a 30ms audio delay changes the perceived timing of footsteps, gunshots, and environmental cues.

osu! Audio Latency Test and Universal Offset Setup

osu! is among the most latency-sensitive rhythm games. Run this online audio latency test with your exact gaming headset or speakers, note the average ms result, then open osu! → Settings → Audio → Universal Offset and enter the negative of your measurement. Example: this tool shows 62ms → enter -62 in Universal Offset. Fine-tune with osu!'s built-in Offset Wizard using a familiar song at a consistent BPM.

Wired vs. Wireless Gaming Headsets: Latency Comparison

Wired 3.5mm headsets through a sound card or audio interface achieve under 10ms. Wired USB headsets show 10–20ms. 2.4GHz RF wireless headsets (SteelSeries Arctis, Logitech G Pro X Wireless) achieve 15–40ms — acceptable for all gaming including rhythm games. Standard Bluetooth gaming headsets using SBC codec show 150–200ms, causing clearly noticeable audio/visual desync.

PS5 Audio Latency Test

The PlayStation 5's Tempest 3D Audio engine is designed for low-latency spatial audio processing. Through HDMI audio output to a TV, latency depends on the TV's audio processing mode — enabling Game Mode on your TV/receiver is critical, reducing TV audio latency from 100–200ms to under 20ms. The PS5 USB headset (Pulse 3D) achieves approximately 10–20ms wireless latency using Sony's proprietary RF dongle.

If your latency test result is higher than you'd like, try these fixes for your setup. Start with the simplest changes first — switching from Bluetooth to wired often makes the biggest difference.

Fix High Audio Latency on Windows 10 & 11

1. Install ASIO4ALL (free) if using onboard audio. Set buffer size to 128 or 64 samples.
2. In your audio app or DAW, switch to WASAPI Exclusive mode to bypass the Windows audio mixer.
3. Open Control Panel → Sound → Properties → Enhancements and disable all audio enhancements.
4. Run LatencyMon to find drivers causing DPC latency spikes. Common culprits: WiFi drivers, NVIDIA/AMD GPU drivers.
5. Set Windows power plan to High Performance to prevent CPU clock throttling during audio tasks.

Fix Bluetooth Audio Latency

1. Enable aptX Low Latency or aptX Adaptive on your Bluetooth device via its companion app.
2. On Android: Settings → Developer Options → Bluetooth Audio Codec → select aptX or LDAC.
3. Enable Gaming Mode or Low Latency Mode in your headphones' companion app.
4. Minimize distance between headphones and transmitter. Physical obstructions cause codec fallback to SBC.

Fix Audio Latency on Linux (PipeWire / PulseAudio / JACK)

These steps are for advanced users comfortable editing system configuration files.

1. Switch from PulseAudio to PipeWire: sudo apt install pipewire pipewire-pulse
2. Reduce PipeWire quantum: create /etc/pipewire/pipewire.conf.d/10-lowlatency.conf with default.clock.quantum = 256
3. Add user to realtime group: sudo usermod -aG realtime $USER

Fix Audio Latency on Android

1. Use apps that explicitly request low-latency audio (requires Android 8.0+) rather than older audio paths.
2. Use a wired connection (USB-C to 3.5mm adapter with a DAC chip) for minimum latency.
3. Close background apps consuming CPU — Android's audio stack is sensitive to CPU scheduling delays.
4. For music production on Android, use USB audio interfaces that support Android's USB Audio Class 2.0 driver.