SDC – Sub Delay Checker
stop guessing-start measuring
$3.99
give your subwoofer the real kick!
stop guessing - start measuring.
you are a touring dj or a sound engineer on a tight schedule and a tighter budget.
sdc gets your subs and tops aligned with the gear you already carry.
WHAT YOU NEED
- iPhone, iPad or Mac
- an audio interface, or the usb card already in your mixer
- a measurement microphone
run the output and the microphone through the same interface. that shared sample
clock is what makes the timing trustworthy, and sdc warns you when the two don't
match. a built-in phone mic is fine for a rough look - a measurement mic on one
shared clock is what you want when it counts.
HOW IT GOES
1. hook it up and pick your input and output channels
2. hit start - a level check runs first so you can set your gain
3. the app walks you through it: mute the sub and it measures the top,
mute the top and it measures the sub
4. read the answer
WHAT YOU GET
not a chart to interpret. a sentence to act on:
"increase sub delay by 0.8 ms to reach phase alignment at 100 Hz"
and the numbers behind it: arrival times for top and sub, the difference in
milliseconds and in metres, how far the phase is off at your crossover, and how
high up the two stay inside the 60 degree corridor. tell sdc if your dsp or sub
runs a 180 degree polarity flip and it aims at the right target angle.
set the value on your mixer or dsp. done.
THE ROOM, IF YOU WANT IT
after a measurement you can add a room sweep to the same export. sdc plays a
reference sweep, records the response, and hands you both files as a
stimulus/response pair for whatever analyser you already use.
no analysis happens in the app - that part stays in your tool.
for sweeps, use an interface. a phone's built-in speaker and mic don't share a
tight enough clock, and the recording gets rejected on import.
BUILT FOR THE FIELD
- a guide inside the app: signal chain, mic position and height, the full workflow
- an ear protection warning before anything loud plays
- works with what you have: usb interfaces, mixer usb cards, wired measurement mics
YOUR DATA STAYS YOURS
no account, no network, no tracking, no ads. every export lands on your device
and goes nowhere unless you send it yourself.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's new in 1.1.1
• Fixed: the "Current Sub delay" field and the recheck entry are now clearly readable in dark mode.
• Crossover preview: live curves of low-pass, high-pass and their sum, including the entered delay. Drag inside the chart to set the crossover frequency.
• Measured curves appear dashed over the preview after each measurement step.
• Recheck: after dialling in the recommended delay, only the adjusted side is measured again.
• Guided flow: muting tips, a level check that continues once the input is green, and a "Measurement OK?" step that saves the result and offers the room sweep.
• Warning when the level at the crossover frequency is too low for a reliable phase reading.
The developer, frank Barsch, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- frank Barsch
- Size
- 4.1 MB
- Category
- Music
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 studiofb.de
