# SoundMaster RTA — The precise real time analyzer

> Professional real-time sound level analyzer with advanced calibration and data export. (iPhone/iPad app by Lazaros Vrysis.)

- Source: https://appshunter.io/ios/app/soundmaster-rta/id1273125700 (this page in markdown: same URL + `.md`)
- Developer: [Lazaros Vrysis](https://appshunter.io/developer/426938172)
- Category: Utilities, Music
- Price: $9.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 11.0 · 39 MB
- Languages: English
- Released: 2017-12-15
- Data updated: 2026-06-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/soundmaster-rta/id1273125700/reviews.md

## What is SoundMaster RTA?

• Overview
- SoundMaster aims at delivering the most robust sound level measurement readings on the App Store
- Audio data is captured directly from input buffers, ensuring a robust and responsive measurement output
- Features state-of-the-art algorithmic implementations, ensuring high-accuracy readings
- UI is polished to perfection, delivering professional-grade user experience
- Comes pre-calibrated using reference equipment

• Main Features
- Professional sound level measurement capabilities
- Advanced calibration and equalization support
- Extended measurements management

• Under the hood
- 44.1kHz/32bit raw audio recording
- 20Hz to 20kHz frequency response
- 90dB dynamic range, from 25dB to 115dB SPL[A]
- ±1.4dB accuracy @25dB-115dB SPL[A]
- Low latency and processing-loss spectral analyzer
- Audio I/O latencies monitoring and compensation

• Noise Measurements
- Digital VU and numeric visualizations
- Broadband RMS, Peak, Max, Min, Leq and measurement duration data handling
- Octave-based RMS, Leq, Max, Min data handling
- Impulsive, Fast and Slow response modes
- A, B, C, D, Z weighting filters

• Advanced Calibration
- Calibrated and equalized for each iPhone model
- Calibrated for the MicW i436, as an external input source
- Calibration data is OTA (Over the Air) updated
- Additional user calibration and equalization banks for both embedded microphone and external input source
- Custom octave-based gain adjustment support

• Session Management
- Frame-based time-series of measurement data handling
- Overall statistics calculation for noise measurements
- Photo capture capability
- Time and geolocation awareness support
- Title, location and comments metadata support
- Audio recording (CAF format), measurement data (CSV format) and metadata export capabilities

• Additional Capabilities
- Option for keeping the device awake during recording
- Option for auto-stopping measurements after a pre-configured duration
- Background recording capability
- Upside down orientation support

## Key features

- Professional sound level measurement
- Advanced calibration and equalization
- Extended measurements management
- Digital VU and numeric visualizations
- Broadband and octave-based RMS analysis
- Audio recording and data export


## Frequently asked questions about SoundMaster RTA

### What is SoundMaster RTA used for?

SoundMaster RTA is used for professional sound level measurement, providing precise real-time readings. It offers advanced calibration, detailed noise analysis, and the ability to export measurement data and photos.

### How accurate are SoundMaster RTA's measurements?

SoundMaster RTA boasts high accuracy, with readings specified as ±1.4dB at 25dB-115dB SPL[A]. It uses state-of-the-art algorithms and is pre-calibrated using reference equipment for reliable results.

### Can I calibrate SoundMaster RTA for my specific device?

Yes, SoundMaster RTA is calibrated and equalized for each iPhone model. It also supports additional user calibration and equalization banks for both the embedded microphone and external input sources.

### What types of noise measurements does SoundMaster RTA support?

SoundMaster RTA supports various noise measurements including broadband RMS, Peak, Max, Min, Leq, and measurement duration. It also handles octave-based RMS, Leq, Max, Min data and offers impulsive, Fast, and Slow response modes.

### What audio formats can SoundMaster RTA export?

SoundMaster RTA allows for the export of audio recordings in CAF format, measurement data in CSV format, and associated metadata. This makes it easy to integrate data into other professional workflows.

### Does SoundMaster RTA support background recording?

Yes, SoundMaster RTA features background recording capability, allowing measurements to continue even when the app is not actively in the foreground. It also offers an option to keep the device awake during recording.

### What is the price of SoundMaster RTA?

SoundMaster RTA is a paid application, priced at $9.99. This one-time purchase provides access to all its professional sound analysis features.

### How often is SoundMaster RTA updated?

The latest version of SoundMaster RTA is 1.3.2, last updated on April 30, 2021. While updates may not be frequent, the app is designed for robust and reliable performance.

## Version history (last 4 releases)

### 1.3.2 — 2021-04-30

Resolved an issue with dark mode.

### 1.3.0 — 2021-03-28

Updated for iOS 14.

### 1.1.0 — 2017-12-18

A bug in data export was fixed

### 1.0.0 — 2017-12-15

No release notes.

## Apps similar to SoundMaster RTA

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [The Best Level](https://appshunter.io/ios/app/the-best-level/id931500078) | 3.9 (9) | Free | Utilities |
| [GPS Status ∞ Coordinates](https://appshunter.io/ios/app/gps-status-coordinates/id1254805862) | 4.4 (3,228) | Free | Utilities |
| [Moorebot Scout](https://appshunter.io/ios/app/moorebot-scout/id1578410337) | 3.2 (28) | Free | Utilities |
| [SmartSDR™ - FlexRadio Systems®](https://appshunter.io/ios/app/smartsdr-flexradio-systems/id1089157289) | 4.2 (129) | $79.99 | Utilities |
| [Hue for Watch](https://appshunter.io/ios/app/hue-for-watch/id983410597) | 3.0 (4) | $2.99 | Utilities |
| [Remote Mouse Pro](https://appshunter.io/ios/app/remote-mouse-pro/id380450781) | 4.7 (4,693) | $14.99 | Utilities |

## More apps by Lazaros Vrysis

- [Kiss or Miss - A thousand ways to live a date](https://appshunter.io/ios/app/kiss-or-miss-a-thousand-ways-to-live-a-date/id882772875)
- [Army Knife](https://appshunter.io/ios/app/army-knife/id942291511)
- [SoundMaster SLM](https://appshunter.io/ios/app/soundmaster-slm/id1273113441)
- [SoundMaster ISA](https://appshunter.io/ios/app/soundmaster-isa/id1273127092)
- [SoundMaster RVA](https://appshunter.io/ios/app/soundmaster-rva/id1291725677)

All apps by Lazaros Vrysis: https://appshunter.io/developer/426938172

---

*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 2026-06-25.*