What Is UltraEdge in Cricket, How It Works and Why Pakistan Fans Should Understand It
UltraEdge in cricket is the audio and visual technology that decides whether the ball kisses the bat or not. That split-second question has ended careers, changed series results, and sparked some of the loudest arguments cricket has ever seen. If you have watched a DRS review module and wondered what that sound wave on screen actually means this is the complete answer.
We have covered what UltraEdge is, how it works step by step, where it is used, why some series still use the older Snickometer instead, and why Pakistan played an entire PSL season in 2026 without any of it.
What Is UltraEdge in Cricket?
UltraEdge is an audio-visual edge detection system used in cricket’s Decision Review System (DRS). The third umpire in cricket uses it for better results. Its job is simple in concept but complex in execution as it detects whether the ball made contact with the bat, glove, or pad when that contact is too faint for the human eye or ear to confirm for ground umpires.
Invented
The UltraEdge has invented by British computer scientist Allan Plaskett in the late 1990s and first used by UK’s Channel 4 in 1999. It is the direct successor to the original Snickometer.
UltraEdge takes the same core concept, which is converting sound into a visual waveform, and rebuilds it with modern software, HD audio filtering, and high resolution cameras running at up to 340 frames per second.
Approved By ICC
The ICC has approved UltraEdge for use in international cricket after independent verification. Engineers at the Massachusetts Institute of Technology (MIT) tested the system extensively before it was cleared for DRS deployment across all cricket formats. Hence cricket world especially Famous leagues BBL, IPL and SAT20 use it now.
Today UltraEdge in cricket is the standard edge detection tool used for reviews whether the field umpires decision is right or wrong in most international matches outside Australia. It sits alongside Hawk-Eye ball tracking and Hot Spot infrared imaging as the three pillars of the latest DRS.
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How Does UltraEdge Work in Cricket? A Step-by-Step Breakdown
Here is exactly what happens from the moment the ball is bowled to the moment the third umpire raises or lowers the finger.
Step 1: The Stump Microphone Captures Everything
A highly sensitive microphone is embedded inside the pitch and one of the stumps, positioned at ground level where it can pick up sounds from the batting crease. This stump mic runs continuously throughout every delivery. It captures the bat swinging, the ball cutting through air, the pad being hit, clothing brushed, and the faintest nick off the outside edge. It avoids the ground noise.
The microphone does not filter while recording. It takes everything and passes it to the processing system raw.
Step 2: Sound Is Converted Into a Waveform on an Oscilloscope
The audio signal from the stump mic is fed into an oscilloscope, which is a device that converts sound energy into a visual wave pattern on third umpire screen. When there is silence or low ambient noise, the waveform sits flat. When any contact occurs, the waveform spikes upward.
The height of the spike reflects the intensity of contact. A thick edge produces a tall, clear spike. A feather edge produces a small but visible bump. No contact produces a flat line.
This is the waveform Pakistani fans see on their screens during a DRS review when the broadcaster cuts to the UltraEdge display.
Step 3: High-Speed Cameras Sync the Moment of Contact
Simultaneously, cameras positioned at both ends of the pitch and around the boundary track the ball frame by frame. These cameras operate at up to 340 frames per second, which is roughly 14 times faster than a standard broadcast camera.
The camera feed is synced with the audio waveform so the third umpire can see exactly which frame the ball was passing the bat when any spike occurred. This synchronisation between sound and video is the critical difference between UltraEdge and the older Snickometer.
If the spike in the waveform aligns with the frame where the ball is adjacent to the bat, contact is confirmed. If the spike occurs before or after that moment, it is likely caused by something else: bat hitting ground, ball brushing pad, or crowd noise bleeding into the mic.
Step 4: The Third Umpire Makes the Call
The third umpire reviews the synced audio-visual evidence and applies the ICC’s playing conditions. If the evidence clearly shows a spike aligned with bat proximity, the decision is overturned or upheld accordingly. If the evidence is inconclusive, the on-field umpire’s original call stands.
That last rule matters enormously. Inconclusive evidence always defaults to the original decision. UltraEdge does not guess.
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Where Is UltraEdge Used in Cricket?
UltraEdge in cricket is used in most international Test matches, ODIs, and T20Is where DRS is available. But unfortunately, its deployment is not universal and this surprises many fans who assume all DRS is the same everywhere.
The reality is more complicated:
The ICC funds DRS technology for its own tournaments, including the ODI World Cup, T20 World Cup, and Champions Trophy. For bilateral series between two nations, each host board is responsible for arranging and funding its own DRS setup. This is why DRS availability varies between series.
Host broadcasters, not the ICC, often make the final call on which edge detection technology is used. This leads directly to one of cricket’s biggest ongoing debates.
UltraEdge vs Snickometer vs Real-Time Snicko: What Is the Difference?
| Feature | Snickometer (Original) | Real-Time Snicko | UltraEdge |
|---|---|---|---|
| Invented | 1990s, Allan Plaskett | Developed by Fox Sports | 2010s upgrade |
| Audio-video sync | Manual, delayed | Automated, real-time | Automated, real-time |
| Frame rate | Standard broadcast | High speed | Up to 340fps |
| Background noise filtering | Minimal | Moderate | Advanced |
| Used in Ashes 2025/26 | No | Yes (Fox Sports, Australia) | No (Australia chose RTS) |
| Used in most other internationals | No | No | Yes |
| Cost | Lower | Mid-range | Higher |
Sky Sports in the UK dropped Snickometer entirely in 2016 because UltraEdge was simply more accurate. Australia’s Fox Sports made a different call and chose Real-Time Snicko for the Ashes. That decision directly caused the controversy that had Mitchell Starc publicly saying “Snicko needs to be sacked” during the 2025/26 series.
The core problem with Real-Time Snicko in the Ashes was synchronisation. In Alex Carey’s case, a visible gap appeared between the sound spike and the ball passing the bat, leading to a not-out decision despite what looked like a clear edge to England’s players and viewers.
Former umpire Simon Taufel explained that with Real-Time Snicko, officials are instructed to consider the frame both before and after the spike, which is a wider window of judgment than UltraEdge allows.
Had the same pictures been processed through UltraEdge, the decision may well have been different.
What Can Go Wrong? The Four Glitches Every Fan Should Know
UltraEdge in cricket is highly accurate but not infallible. Here are the four situations where it can produce misleading readings.
- Glitch 1: Bat Hitting the Ground When a batter plays a defensive shot and the bat strikes the pitch at the same moment the ball passes the ground impact generates a spike. If that spike aligns closely with the ball’s position it can be misread as an edge. Third umpires are trained to look for this but it remains a genuine source of error.
- Glitch 2: Ball Brushing Clothing or Pad Contact between ball and pad, thigh pad, or clothing also produces a sound. The stump mic picks up frequency differences between bat-on-ball and ball-on-pad but when a ball clips both the pad and the bat edge simultaneously the waveform can merge two signals into one confusing spike.
- Glitch 3: Crowd Noise Bleeding Into the Mic In a packed stadium, crowd roar does not stop because a delivery is being bowled. Sudden loud noise at the exact moment the ball passes the bat can cause a spike that has nothing to do with contact. This is more common in high-pressure matches where crowd noise peaks during appeals.
- Glitch 4: Audio-Video Sync Drift Even with UltraEdge’s advanced synchronisation, a tiny drift between the audio feed and the video feed can shift a spike by one or two frames. One frame at 340fps is a very short window but it is enough to place a genuine spike just outside the bat’s position on screen, creating doubt where none should exist.
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Bangladesh vs Pakistan: The Big Screen Review
Pakistan filed an official complaint after Bangladesh allegedly called for a DRS review after the replay of the delivery had already appeared on the ground’s big screen.
Under ICC playing conditions a review must be called before the replay is shown publicly. Seeing the replay first gives the batting or fielding side information they should not have when making the review decision.
If proven, this kind of incident raises a serious question about how DRS reviews are policed in real time particularly in high-pressure knockout matches. The technology works but the protocol around when it can be triggered is a human process that remains vulnerable.
PSL 2026: An Entire Tournament Without DRS
This one hit Pakistani fans hard. The Pakistan Super League 2026 was suspended earlier in the year amid border tensions between Pakistan and India. When the tournament resumed, the Hawk-Eye team that supplies the ball-tracking technology did not return to Pakistan.
The result was that the remainder of PSL 2026 was played without DRS at all. No UltraEdge, no Hawk-Eye, no Hot Spot. Umpires made every decision with the naked eye, the way cricket was played for a century before any of this technology existed.
For a league trying to establish itself as one of the premium T20 competitions in world cricket, losing DRS mid-tournament was a significant blow to its credibility. It also underlined something fans rarely think about UltraEdge and DRS are not guaranteed. They are contracted services that can disappear when logistics break down.
UltraEdge and Hot Spot: How They Work Together
UltraEdge handles sound. Hot Spot handles heat. Together they give the third umpire two independent forms of evidence for the same delivery.
Hot Spot uses infrared cameras to detect the friction heat generated when ball meets bat. When the ball makes contact, a white mark appears on the infrared image at the exact point of contact. No contact means no mark.
The two technologies complement each other because they are independent. A genuine edge should produce both an audio spike on UltraEdge and a heat mark on Hot Spot. When only one shows evidence, the third umpire has to weigh the available data carefully.
Hot Spot is expensive and not always available. UltraEdge is the more widely deployed of the two, which is why it carries more weight in most DRS decisions.
FAQs: UltraEdge in Cricket
Q1: What is UltraEdge in cricket?
A: UltraEdge is audio-visual edge detection technology used in cricket’s DRS.
Q2: How does UltraEdge work in cricket?
A: Stump mics capture sound, convert it to a waveform, synced with 340fps cameras for the third umpire.
Q3: What is the difference between UltraEdge and Snickometer?
A: UltraEdge has better audio filtering, faster cameras, and automated audio-video sync. Snickometer was manual and slower.
Q4: Who is captaining Australia in the Pakistan ODI serie
A: Mitch Marsh is named captain with Pat Cummins absent due to IPL and rest.
Q5: Can UltraEdge make mistakes?
A: Yes. Bat hitting ground, ball brushing pad, crowd noise, and sync drift can all cause misleading spikes.
Q6: Is UltraEdge used in Pakistan home matches?
A: When DRS is available, yes. PSL 2026 was an exception when Hawk-Eye withdrew mid-tournament.
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