Sweep: Speaker Tuning
Frequency response, untethered
About
Analyze your speaker's frequency response directly from your listening position. This app plays a log sweep and captures the sound with your iPhone's mic or a calibrated external mic, then displays the results. Easily compare multiple measurements to fine-tune your audio setup.
What's New in Sweep
1.3
July 17, 2026
Bring your own mic. Sweep now reads miniDSP UMIK-1, UMIK-2, EARS, Behringer ECM8000, and REW-style .cal files — alongside the one-cable Dayton iMM-6C. Chart scrubbing feels quicker too. Thanks for measuring with Sweep.
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FAQ
What is Sweep: Speaker Tuning?
Sweep: Speaker Tuning is a utility app that allows you to measure and visualize the frequency response of your speakers directly from your listening position using your iPhone. It plays a log sweep and analyzes the captured audio to provide a clear graph of your speaker's performance.
How does Sweep: Speaker Tuning work?
The app plays a 20 Hz–20 kHz log sweep through your speakers. It then uses your iPhone's microphone or a calibrated external microphone to capture the sound. On-device processing extracts the impulse response and plots the frequency response curve.
Can I compare different speaker settings with Sweep: Speaker Tuning?
Yes, Sweep: Speaker Tuning allows you to overlay up to five different measurement runs, each displayed in a unique color. This makes it easy to visually compare the impact of adjustments you make to your speaker's DSP or EQ.
What kind of microphone should I use with Sweep: Speaker Tuning?
While the app can use your iPhone's built-in microphone, it recommends using a calibrated USB-C microphone such as the Dayton iMM-6C for more accurate results. The accuracy of the measurements depends on the calibration of the microphone file you import.
Does Sweep: Speaker Tuning have ads?
No, Sweep: Speaker Tuning is completely ad-free. It is designed to be a focused instrument and does not contain advertisements.
Is Sweep: Speaker Tuning available on Android or other platforms?
Currently, Sweep: Speaker Tuning is only supported on iPhone. The app is designed to run entirely on your device and does not require an account or cloud services.
How often is Sweep: Speaker Tuning updated?
Sweep: Speaker Tuning was last updated on July 7, 2026, with version 1.2. The developer, Carl Sieber, focuses on creating specialized instruments, suggesting updates will likely focus on refining existing features and ensuring compatibility.
What are the privacy features of Sweep: Speaker Tuning?
Sweep: Speaker Tuning is private by default. It runs entirely on your device, requires no account or signup, and does not use cloud services, tracking, or analytics SDKs. Your measurements and audio are processed and never leave your iPhone.