The Dayton Audio iMM-6 series microphones are popular choices for audio measurement, especially for applications like WiiM Room Correction (RC). These microphones are designed for ease of use, plugging directly into your smartphone’s headphone or USB port, making them readily accessible for acoustic analysis. To enhance measurement accuracy, Dayton Audio provides calibration files specific to each microphone. These files can be utilized with compatible apps, such as the Audio Tool app, to ensure precise readings. This guide outlines the setup and measurement procedure for the Dayton Audio iMM-6 microphone when used with the Audio Tool app, a process particularly relevant for users of WiiM Room Correction and anyone interested in accurate audio measurements.
The IMM-6 microphone series comes in several configurations to suit different devices:
- IMM-6: (3.5mm TRRS out + 3.5mm out) – Versatile connectivity with standard 3.5mm jacks.
- IMM-6C: (USB-C out + 3.5mm out) – Modern USB-C connection alongside a 3.5mm output.
- IMM-6S: (3.5mm TRRS out) – Streamlined 3.5mm TRRS output for simple connections.
This guide focuses on the standard IMM-6 model. These microphones are designed to be user-friendly, connecting directly to your smartphone’s headphone or USB port for immediate use. For increased accuracy, a calibration file specific to each microphone can be downloaded and implemented within a compatible app.
For Android users, the Audio Tool app is a robust measurement tool that supports IMM-6 calibration, making it an excellent choice for setting up your microphone.
You can refer to the comprehensive Audio Tool manual for detailed information on its features and functionalities:
Bofinit Corporation – AudioTool – Online Manual
A PDF version of the online manual is also available for download: AudioTool PDF.
Upon launching AudioTool, the main screen presents the Real Time Analyzer (RTA), which is central to audio measurement tasks. The RTA display is structured into three key areas, with the top section prominently showing the RTA frequency response in ISO one-octave bars.
To begin, download and install the Audio Tool app from the Google Play Store:
Install the application on your Android phone and connect your Dayton Audio IMM-6 microphone to your phone. (This example uses an LG V60 ThinQ with a 3.5mm headphone jack.)
Locate the serial number for your IMM-6 microphone. This number is printed on the back of the microphone’s packaging.
Navigate to the Dayton Audio Microphone Calibration Tool website to download your microphone’s specific calibration file:
Support | Microphone Calibration Tool
On the calibration tool webpage, select the IMM-6 microphone model from the dropdown menu, enter the serial number (including hyphens), and click the search button. A download link for your calibration file will then appear. Tap the link to download the calibration file to your smartphone.
To prepare the Audio Tool app for measurement, and to use your calibration file, follow these steps within the app:
First, for sweep measurements, switch the tool setting to “Peak store” within the Audio Tool app.
Next, import the microphone calibration file into the Audio Tool app.
Press the green “Menu” button (typically located in the top right corner) and select “Use 1/3 Octave Calibration” from the menu options. If the option reads “Import cal file”, tap that instead.
From the list of files on your device, select the calibration file you downloaded to import it into the app.
This completes the essential setup for using your Dayton Audio iMM-6 microphone with the Audio Tool app.
Here are some basic operational tips within the Audio Tool app:
- Press “Running”: This will stop the ongoing measurement process.
- Press “Store”: This saves the current measurement values.
- Press “Load”: This allows you to display previously saved measurements, enabling comparison with current readings.
- Press “Paused”: This clears the current values and restarts the measurement.
With these steps, you are now set up to take accurate audio measurements using your Dayton Audio iMM-6 microphone and the Audio Tool app, ready for applications like WiiM Room Correction and other acoustic analyses.
