Recording audio using more than one feed from the same source may create phase issues. For example, when miking a bass amp and taking a DI (dry) input, the DI's audio arrives at your interface instantly. But because sound travels 12 (30 cm) in 1 millisecond, the mic's audio will arrive later due to the distance between the mic and speaker. This means it won't be time-aligned with the direct sound, so there will be a phase difference.
Miking an acoustic guitar with two mics, or drum overheads that are a distance from the drum kit, may also lead to potential phase problems. Even partial phase cancellations can thin or weaken the sound.
It's best to check for phase issues and fix them prior to mixing. One way to resolve phase issues is to look at the two waveforms on the timeline, and line them up visually. However, the waveforms may not look that similar (fig. 1), especially when comparing audio like a room mic with a close-miked sound.
Figure 1: Despite being zoomed in, you wouldn't necessarily know from the waveforms that they are at their point of maximum cancellation.
Another option is to sum the sources in mono, delay or advance one relative to the other, and listen for what sounds the strongest. That can work, but it's not always easy to hear exactly when the waveforms are in phase. Let's make the process more foolproof.
The Phase Correction Process
The goal is to find the alignment of the two waveforms where the audio sounds the strongest. However, it's easier to hear phase cancellation than addition. So, by inverting the phase of one channel, we can align the tracks for maximum cancellation. Returning the phase to normal then gives the strongest sound. Here's the process:
1. Solo the channels that may have a potential phase issue. Determine whether they do by listening for a thinner sound when they're summed to mono, or both panned to center.
2. Match the channel levels as closely as possible.
3. Pan the two channels hard left and hard right.
4. Insert the Phase Meter plugin in the master bus.
5. Insert a Mixtool in one of the instrument channels. Invert the Mixtool's phase. If a track uses stereo audio, invert the left and right channels.
6. Turn off Snap. This allows nudging an Event in 1 millisecond increments. Select the Event and type Alt+Right Arrow to move the track earlier by 1 ms, or Alt+Left Arrow to move the track later by 1 ms.
7. Nudge one of the tracks with respect to the other track until the Phase Meter shows the most negative correlation (i.e., the lower bar graph swings to the left as much as possible, as in fig. 2). This indicates maximum cancellation. Note: The time range for maximum cancellation is extremely narrow. One millisecond can make the difference between substantial cancellation and no cancellation. Be patient. Adjust 1 ms at a time.
Figure 2: A negative correlation reading indicates that the two sources have phase differences.
8. You've now aligned the two tracks. Remove the Mixtool plugin so that the two signals are in phase.
Tip: For audible confirmation, in Step 7 listen as you make these tiny changes. If you enable the Mono button in the Main bus, aim for the thinnest possible sound. If you monitor in stereo, listen for the narrowest stereo image.
Super-Fine Tuning 1 ms is a significant time shift when trying to match two signals' phase. Step 7 will isolate a 1 ms window where the two tracks are in phase (or at least close to it), but you may be able to do better.
Select Samples for the Timebase and turn off Snap. Zoom in far enough, and you'll be able to click on the Event and drag it earlier or later in 1 sample increments (fig. 3). That can tighten the phase further, if needed.
Figure 3: With Timebase set to Samples and Snap turned off, the resolution for moving an Event is 1 sample.
This may be overkill, but I know some of you are perfectionists . Happy phase phixing!
Most recent headlines
09/11/2025
Dalet today announced a transformative leap forward for media operations: Agentic Artificial Intelligence (AI) that unifies the Dalet ecosystem under one natura...
28/10/2025
ESPN Announces Monsters Funday Football', Its Latest Real-Time Animated Bro...
28/10/2025
SVG All-Stars: Catherine Chalfant, Manager, Remote Operations, ESPNThe Ole Miss alum is an operational force behind ESPN's extensive college-football catalo...
28/10/2025
Elevating the experience: AI and data take Ryder Cup to the next level By Joe OHalloran
Tuesday, October 28, 2025 - 10:25
Print This Story
NBC produced th...
28/10/2025
Conquering the Air (waves): Taking a close up look at the IBC Accelerator Priva...
28/10/2025
World Series 2025: Spectrum SportsNet LA Brings Dodgers Fans Closer to the Actio...
28/10/2025
Dylan Southern and Benedict Cumberbatch at the premiere of The Thing with Feathers (photo by George Pimentel / Shutterstock for Sundance Film Festival)...
28/10/2025
For three weeks in Lagos, Spotify's Greasy Tunes Caf pop-up brought the cit...
28/10/2025
Once a niche subculture, German rap has evolved into an influential cultural movement. Now, Spotify is giving the genre a new home with OFFCULT, a playlist dedi...
28/10/2025
Shane Delia's Malta serves up the Mediterranean this summer
28 October, 2025
Media releases
Feast on 9,000 years of culinary history Mondays from 24 No...
28/10/2025
SBS's global sporting festival continues with the FIVB Beach Volleyball Worl...
28/10/2025
Bilbao, October 28, 2025 - AgileTV, a leading technology solutions company for t...
28/10/2025
Disney, NBCUniversal, FOX, Paramount Each Achieve Double-Digit Monthly Growth
...
28/10/2025
CINCINNATI The E.W. Scripps Company has announced an agreement to sell WRTV, its local ABC-affiliated station in Indianapolis, to Circle City Broadcasting for $...
28/10/2025
Berklee College of Music and Berklee Valencia Named to Billboards 2025 Top Music...
28/10/2025
NEW YORK As AI usage continues to spike, a new study from IAB delves into an important aspect of how AI is transforming the advertising business with new data s...
28/10/2025
Charlie Jablonski, a broadcast tech pioneer who helped shape the modern era of Olympics television coverage, died Oct. 25 at his home in Lake George N.Y., the N...
28/10/2025
VIENNA, Austria Bitmovin has launched Bitmovin Observability, a new stand-alone video data solution that delivers real-time insights into video playback. The so...
28/10/2025
LOS ANGELES LucidLink, the file streaming platform, has announced a Frame.io integration and expanded mobile capabilities at Adobe Max....
28/10/2025
Mediagenix, a global leader in smart content solutions to profitably connect the right content to the right audience, today announced that it has joined the Ama...
28/10/2025
Lightware, an industry leader in connectivity and signal management solutions, has announced a major update to its Taurus
platform, which now delivers flawless...
28/10/2025
Following a successful mid-September International Broadcasting Convention in Amsterdam, Hiltron Communications will promote its full range of satellite communi...
28/10/2025
Open Broadcast Systems has chosen MC&S (Media Consulting & Services) as a reseller to help strengthen its presence in France.
With over twenty years of experi...
28/10/2025
Bitmovin, leading provider of video streaming solutions, has launched Bitmovin Observability, a new stand-alone video data solution that delivers real-time insi...
28/10/2025
Ease Live, the leader in interactive TV technology, today announced the successful launch of interactive graphical overlays for UEFA Champions League matches fo...
28/10/2025
LucidLink, the file streaming platform, today at Adobe MAX announced a Frame.io integration and expanded mobile capabilities, streamlining collaboration and hel...
28/10/2025
ATLANTA Gray Media has promoted Nick Hasenecz to general manager of WNDU, its NBC affiliate in the South Bend-Elkhart, Ind., market....
28/10/2025
Applications Open for Berklee Fenway Neighborhood Improvement Grant Boston nonprofits can apply by December 12 for funding to support community projects that ...
28/10/2025
28 Oct 2025
VEON's JazzCash Wins Silver Award for Innovation in Lending at ...
28/10/2025
Guests include Wayne Rooney, Maya Jama, Dame Laura Kenny, Chloe Kelly, Chris McC...
28/10/2025
The two-hour special, recorded live from the iconic Dolby Theatre in LA, will ai...
28/10/2025
Eutelsat upgrades teleports with Rohde & Schwarz satellite uplink amplifiers High efficiency and resilient Ku-band amplifiers for excellent RF performance
...
28/10/2025
These appointments come at a pivotal time for ABC, as the organisation continues to evolve to meet the changing needs of a digital-first media ecosystem. The ne...
28/10/2025
Scripps Research awarded $4 million to advance platform for neurodevelopmental disorders The California Institute for Regenerative Medicine (CIRM) grant support...
27/10/2025
You can touch this: Haptics becoming central to the virtual live experience By Adrian Pennington
Friday, October 24, 2025 - 09:12
Print This Story
The vid...
27/10/2025
A tale of two trailers: France's Stop & Go doubles up with its new hybrid tr...
27/10/2025
Pro Padel League Stages City's Cup Finals Inside NYC's Hammerstein Ballr...
27/10/2025
World Series 2025: Sportsnet Delivers Made-in-Canada' Moment for a Nation U...
27/10/2025
ESPN Extends Partnership With Sony's Beyond Sports To Expand Animated Altern...
27/10/2025
Reid Davenport attends the 2025 Sundance Film Festival premiere of Life After at The Ray Theatre on January 27, 2025, in Park City, UT. (Photo by Robin Marsha...
27/10/2025
As the days grow shorter and the nights get darker, there's nothing like getting swept up in a story that sends shivers down your spine. In honor of spooky ...
27/10/2025
UPDATE: Both parties have reached a new carriage agreement....
27/10/2025
LONDON As Hollywood jumps into the production of mini-dramas, a new study from Ampere Analysis finds that more than one in 10 internet users have watched drama ...
27/10/2025
LONDON Yealink, a provider of unified communication and collaboration solutions, has joined the NDI ecosystem with the availability of its SmartVision 80 premiu...
27/10/2025
ATLANTA Gray Media has named Chris Conroy as general manager of its stations in Cleveland, leading WOIO, a CBS affiliate, The CW station WUAB and Telemundo outl...
27/10/2025
ESPOO, Finland European connectivity leaders Nokia and Ericsson, have partnered with Berlin's Fraunhofer Heinrich Hertz Institute (HHI), to shape and drive ...
27/10/2025
PHILADELPHIA Comcast has expanded NOW TV Latino, its Spanish-language live TV and streaming offering, adding five more channels from Univision, ViX Premium with...
27/10/2025
Test & measurement innovator, Leader Electronics, will present its latest products and solutions at InterBEE 2025 (Hall 5, Booth 5218) Makuhari Messe in Chiba, ...
27/10/2025
Back to All News
City of Shadows, the New Netflix Thriller Arrives on December 12
Entertainment
27 October 2025
GlobalSpain
Link copied to clipboard
Downl...
Recording audio using more than one feed from the same source may create phase issues. For example, when miking a bass amp and taking a DI (dry) input, the DI's audio arrives at your interface instantly. But because sound travels 12 (30 cm) in 1 millisecond, the mic's audio will arrive later due to the distance between the mic and speaker. This means it won't be time-aligned with the direct sound, so there will be a phase difference.
