# DM-RTA

> Portable audio system calibration tool with RTA, voltmeter, polarity, SPL, and oscilloscope. (iPhone/iPad app by AudioControl.)

- Source: https://appshunter.io/ios/app/dm-rta/id1445780170 (this page in markdown: same URL + `.md`)
- Developer: [AudioControl](https://appshunter.io/developer/393393374)
- Category: Utilities, Music
- Price: Free
- Rating: 3.20/5 from 11 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 60 MB
- Languages: American English
- Released: 2019-01-10
- Data updated: 2026-09-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/dm-rta/id1445780170/reviews.md

## What is DM?

IMPORTANT NOTE: firmware v0.0.75 and above is required for proper operation. 

DM-RTA signal analyzer provides five of the most important tools that installers use to make systems sound perfect. 

The DM-RTA can also generate the test tones and signals used for analysis, like sine waves, clicks, and pink noise. 

This portable device features a built-in battery, which can keep its charge for about 3 to 5 hours, giving you plenty of time to take readings in a vehicle before needing a recharge. There's even 48-volt phantom power available for the microphones that need it to operate

* RTA, or real-time analyzer, visualizes system response across the entire sound spectrum. You can measure the acoustic response using a microphone, or the electrical response using the line inputs.
* Voltmeter displays a signal's voltage, so you can match a device's output to another's input sensitivity.
* Polarity Checker makes sure all your drivers are moving in the same direction at the same time.
* SPL Meter helps you level-match your speakers.
* Oscilloscope displays signals as sine-type waves that show a sound's frequency, voltage level, and whether or not it's clipping five-in-one signal analyzing tool voltage meter (Vrms).
* Real-time analyzer (RTA) 1/3, 1/6, or 1/12 octave resolution.

The DM-RTA app works with mobile device using a Bluetooth connection.

## Key features

- Real-time analyzer (RTA)
- Voltmeter
- Polarity checker
- SPL meter
- Oscilloscope
- Test tone generation

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/dm-rta/id1445780170/reviews.md

### 5/5 — Super Convenient Tool

*2024-01-18, version 1.2*

What better way to use the AudioControl RTA!! Yes we can use a computer and have it hardwired but most of us would like to reduce extra things to hook up and do it from outside the vehicle.

### 1/5 — Doesn’t work via Bluetooth anymore

*2023-08-10, version 1.2*

App used to work but is now garbage, makes since with the company changing hands.  Get a new RTA and get away from Audio control and PAC. There are more reliable options for professional use.

### 5/5 — Best in the market

*2020-04-24*

Great app for doing audio measurements on the go.

## Frequently asked questions about DM

### What is DM-RTA?

DM-RTA is a portable signal analyzer that provides five essential tools for audio system calibration, including a real-time analyzer, voltmeter, polarity checker, SPL meter, and oscilloscope.

### What are the key features of DM-RTA?

Key features include real-time spectrum analysis with 1/3, 1/6, or 1/12 octave resolution, voltage measurement, polarity checking, SPL metering, and oscilloscope display of signals.

### What devices is DM-RTA compatible with?

DM-RTA is compatible with iPhone, iPad, and iPod devices and connects via Bluetooth.

### How long does the DM-RTA battery last?

The built-in battery provides approximately 3 to 5 hours of continuous use on a single charge, allowing ample time for readings before recharging.

### Does DM-RTA require a microphone?

DM-RTA can measure acoustic response using a microphone or electrical response using line inputs. It also offers 48-volt phantom power for microphones that require it.

### What is the firmware requirement for DM-RTA?

Firmware version v0.0.75 or above is required for proper operation of the DM-RTA signal analyzer.

### What is the user rating for DM-RTA?

DM-RTA has a user rating of 3.2 stars based on 11 ratings.

### Does DM-RTA have ads?

No, DM-RTA does not contain advertisements.

## Version history (last 4 releases)

### 1.00 — 2025-07-26

Lots of bug fixes and improvements.

### 1.2 — 2020-04-08

Lots of bug fixes and improvements.

### 1.1 — 2019-01-10

Firmware v0.0.64 and above is required for proper operation.

Updated product description.

### 1.0 — 2019-01-09

No release notes.

## Apps similar to DM

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HAA CinemaTools with HAA Link](https://appshunter.io/ios/app/haa-cinematools-with-haa-link/id1180224503) | 5.0 (1) | Free | Utilities |
| [SoundMeter X](https://appshunter.io/ios/app/soundmeter-x/id1348050232) | 3.7 (44) | Free | Utilities |
| [AX-DSP-XL](https://appshunter.io/ios/app/ax-dsp-xl/id1495854432) | 2.2 (5) | Free | Utilities |
| [S8 DSP Mobile](https://appshunter.io/ios/app/s8-dsp-mobile/id1518830726) | 1.8 (4) | Free | Utilities |
| [SignalScope X](https://appshunter.io/ios/app/signalscope-x/id1304775893) | 3.0 (23) | Free | Utilities |
| [TuN Mobile](https://appshunter.io/ios/app/tun-mobile/id1327789107) | 4.4 (7) | Free | Utilities |

## More apps by AudioControl

- [Mobile Tools by AudioControl](https://appshunter.io/ios/app/mobile-tools-by-audiocontrol/id1321129383)
- [DM Smart DSP](https://appshunter.io/ios/app/dm-smart-dsp/id1445478173)
- [DM Control](https://appshunter.io/ios/app/dm-control/id1469628183)
- [HT-Remote](https://appshunter.io/ios/app/ht-remote/id1502134155)

All apps by AudioControl: https://appshunter.io/developer/393393374

## Related topics

[audiocontrol](https://appshunter.io/ios/topics/audiocontrol) · [mobile tools](https://appshunter.io/ios/topics/mobile-tools) · [rta audio tool](https://appshunter.io/ios/topics/rta-audio-tool)

---

*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 2026-09-01.*