PA Check – Tone & Analyser
Pink noise, sweep & analyser
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Test signals for the soundcheck: sine, pink and white noise. The analyser finds feedback and shows the frequency response of the room.
PA Check is a signal generator and analyser for the soundcheck. Its two large dials for frequency and level can be used with one hand. Changes take effect at once and without clicks.
Free:
• Sine tone from 20 Hz to 20 kHz. Set the frequency with the dial, or double-tap it and type the value
• Pink and white noise
• Arrow buttons step in thirds of an octave, matching the bands of a graphic equaliser
• Output left, right or stereo, to find a dead channel
• Level shown in dBFS. The level stays below −12 dBFS and fades in softly
• The signal stops automatically when a cable is pulled or a call comes in. The screen stays on while the signal is running
One-time purchase "Analyser and Sweep":
• Third-octave analyser with 31 bands from 20 Hz to 20 kHz: play pink noise and read the frequency response of the room
• Feedback finder: shows the most prominent frequency in hertz and the third-octave band to pull down on the equaliser
• Sweep from 20 Hz to 20 kHz in 12 seconds as a full-screen graph: the curve is drawn while the tone rises. Peaks and dips are marked and labelled, with zoom and landscape view
• Several measurements are kept side by side. Step through them, compare them one behind the other in a three-dimensional view, or average them into one curve
• With an audio interface: choose the input for the measurement microphone and the output pair (1/2, 3/4 …)
Note: an iPhone microphone is not calibrated. Levels are relative to the microphone's full scale, not to actual sound pressure. Nothing is recorded.
No account, no ads, no tracking, no subscription. Works without an internet connection.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
On the iPad the app now uses more of the screen, with larger type.
The developer, Christian-Conrad Knorr, 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
- Christian-Conrad Knorr
- Size
- 2.3 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Analyser and Sweep $3.99
- Copyright
- © 2026 Christian-Conrad Knorr
