# Open Sound Meter — Audio system tuning

> Real-time audio system tuning and analysis tool with comprehensive measurement capabilities. (iPhone/iPad app by Pavel Smokotnin.)

- Source: https://appshunter.io/ios/app/open-sound-meter/id1552933259 (this page in markdown: same URL + `.md`)
- Developer: [Pavel Smokotnin](https://appshunter.io/developer/1552933261)
- Category: Music, Utilities
- Price: $69.99
- Rating: 5.00/5 from 5 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 45 MB
- Released: 2021-07-05
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/open-sound-meter/id1552933259/reviews.md

## What is Open Sound Meter?

Open Sound Meter is an application for tuning and controlling audio systems in real-time.
Allows to measure and analyze:
- Spectrum
- SPL (RMS, Leq)
- Magnitude
- Phase
- Group delay
- Phase delay
- Coherence
- Impulse
- Step
- Spectrogram
- Impedance
- Nyquist plot
- Crest factor

You can store any result. Stored measurement can be adjusted by gain, delay and polarity, adjusted with filters, equalization.

Math function gives you a possibility to average your measurements, virtually join them and predict how they will sound together.

For better results, you can apply calibration files for your microphones.
For the measurement, you can use any iOS compatible audio interface or connect to your mixing console. Save the project on the device or in iCloud.

Direct connection works with Behringer X32, Midas M32, Allen&Heath Qu, DiGiCo S21/S31/SD12/UB-MADI, Yamaha TF and other consoles that have audio over USB. For Yamaha CL/QL you can use Dante AVIO adapter.

## Key features

- Real-time audio system tuning
- Spectrum, SPL, Magnitude, Phase analysis
- Store, adjust, and average measurements
- Apply calibration files for microphones
- Direct connection to mixing consoles
- Project saving to device or iCloud

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/open-sound-meter/id1552933259/reviews.md

### 5/5 — Like smaart but easy to use

*2025-03-20*

Inexpensive alternative to smaart. Very accurate and easy to use. 
Thank you very much for this peace of software!
One request: the trash bins on the right side are not really reachable with fingers on IPhone and IPad versions. Maybe move them a bit to the left?
And a full screen mode for the graph in IPhone version would be really great.

**Developer response:** Thank you. You can swipe a source to the left to delete it fast.

### 5/5 — Nearly Perfect tool for the job

*2023-07-07*

Love the software. Support the dev! Like Smaart lite, but so cheap. I get results w this so quickly and the IR delay finder is eerily accurate

### 5/5 — Great Work

*2022-03-07*

great work, keep it up and take care of yourself in these times !

**Developer response:** Thank you!

### 5/5 — Better then Smaart

*2021-07-11*

Simply. Fast. Powerful.

**Developer response:** Thank you

## Frequently asked questions about Open Sound Meter

### What audio parameters can Open Sound Meter measure?

Open Sound Meter can measure and analyze a wide range of audio parameters including Spectrum, SPL (RMS, Leq), Magnitude, Phase, Group delay, Phase delay, Coherence, Impulse, Step, Spectrogram, Impedance, Nyquist plot, and Crest factor.

### Can I adjust measurements after they are taken in Open Sound Meter?

Yes, stored measurements can be adjusted by gain, delay, and polarity. You can also apply filters and equalization to fine-tune them.

### Does Open Sound Meter support microphone calibration?

Yes, for better results, you can apply calibration files for your microphones within Open Sound Meter to ensure accurate measurements.

### What devices can I connect to Open Sound Meter for measurements?

You can use any iOS compatible audio interface or connect directly to supported mixing consoles like Behringer X32, Midas M32, Allen&Heath Qu, DiGiCo S21/S31/SD12/UB-MADI, and Yamaha TF via USB.

### How much does Open Sound Meter cost?

Open Sound Meter is a paid application priced at $69.99.

### Is Open Sound Meter available on Android?

Based on the provided data, Open Sound Meter is available for iPhone, iPad, and iPod, indicating it is an iOS-exclusive application.

### How often is Open Sound Meter updated?

The latest version, 1.5.2, was last updated on September 17, 2025. This suggests a relatively active development cycle for the application.

### What is the user sentiment for Open Sound Meter?

The app has received a perfect rating of 5.0 stars from 4 ratings, indicating very positive user sentiment among its current users.

## Version history (last 5 releases)

### 1.5.2 — 2025-09-17

New in 1.5
- Equalizer source
- Leq chart
- 200Hz Low-pass filter to measurements
- Gain, polarity and delay to filters
- Shelf, notch, band pass filters
- Q factor 4th order All-pass filter
- Deselect source by right mouse click
- Group and Equalizer properties available by click on the header of corresponding group
- Flat standard line
- Filter out mathematical noise in convolution

1.5.1 adds bug fixes and small corrections to the equaliser
1.5.2 improves delay finder and activates split view

### 1.5.1 — 2025-09-04

New in 1.5
- Equalizer source
- Leq chart
- 200Hz Low-pass filter to measurements
- Gain, polarity and delay to filters
- Shelf, notch, band pass filters
- Q factor 4th order All-pass filter
- Deselect source by right mouse click
- Group and Equalizer properties available by click on the header of corresponding group
- Flat standard line
- Filter out mathematical noise in convolution

1.5.1 adds bug fixes and small corrections to the eqalizer

### 1.5 — 2025-08-18

- Equalizer source
- Leq chart
- 200Hz Low-pass filter to measurements
- Gain, polarity and delay to filters
- Shelf, notch, band pass filters
- Q factor 4th order All-pass filter
- Deselect source by right mouse click
- Group and Equalizer properties available by click on the header of corresponding group
- Flat standard line
- Filter out mathematical noise in convolution

### 1.4.1 — 2025-01-16

- Groups
- Generator remote control
- SPL spectrum
- Phon spectrum
- Offset level
- Gain numeric
- LTW transforms for windowing from a time domain
- Frequency range for windowing from a frequency domain
- Points added into target trace
- Presets for target trace (default, immersive, car, headphones)
- Peak hold for numeric values
- Add Brown noise
- Add sin burst noise
- Support for csv calibration file format
- Export cal data with PPO and ignore data with bad coherence ( less 0.97 )
- Add 10 and 120 min Leq values
- Limits for linear impulse chart increased
- Enable Bluetooth and AirPlay devices
- Fix for iOS application as a server

### 1.4 — 2024-12-03

- Groups
- Generator remote control
- SPL spectrum
- Phon spectrum
- Offset level
- Gain numeric
- LTW transforms for windowing from a time domain
- Frequency range for windowing from a frequency domain
- Points added into target trace
- Presets for target trace (default, immersive, car, headphones)
- Peak hold for numeric values
- Add Brown noise
- Add sin burst noise
- Support for csv calibration file format
- Export cal data with PPO and ignore data with bad coherence ( less 0.97 )
- Add 10 and 120 min Leq values
- Limits for linear impulse chart increased
- Enable Bluetooth and AirPlay devices
- Fix for iOS application as a server

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## More apps by Pavel Smokotnin

- [Sub Align](https://appshunter.io/ios/app/sub-align/id1592370318)

All apps by Pavel Smokotnin: https://appshunter.io/developer/1552933261

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*