How to Manage Correction Curves in Smaart RTA Pro

How to Manage Correction Curves in Smaart RTA Pro

Correction curves are used to correct for an individual microphone's frequency response and are either provided by the manufacturer of a microphone at purchase or by a third party calibration laboratory. Similar to the process for Target Curves, simply download a microphone correction curve to your device and save it to the folder “MicCorrectionCurves” within your device's file management system. 

Note that you must have the external microphone connected and selected in order to access the "Manage Correction Curves" button.

How Should Correction Curves Be Formatted?

Correction curves for Smaart RTA follow the same formatting as Smaart desktop. As such, the following section is identical to the correction curve formatting guide in this support article.

Microphone correction curve should be saved as a .txt file with each line containing one frequency value in Hertz (Hz) and one magnitude value in decibels (dB), separated by a [Tab] character. This is commonly referred to as tab delimited ASCII text format. Smaart does not support comma-separated value (CSV) file types or Microsoft Word document formats (.rtf, .docx, etc).

In any case where a text file contains additional columns not required for a given import operation, they are simply ignored. Smaart will also ignore blank lines and any line beginning with a semicolon (;) or an asterisk (*). Beginning a line using either of these characters may be used to add comments, headings, or line spaces to help make data files more human-readable.

Here is an example mic correction curve:

; Sample Microphone Correction Curve
;
; These lines with the semicolon in front
; will be ignored by Smaart and can be
; used to add comments and header info
;
; Freq (Hz)  Magnitude (dB)

1.00  1.08
5.00  1.00
6.66  -3.21
7.00  1.00
10.00  2.01
14.96  3.29
15.00  2.00
50.00  0.50
63.00  -0.48
100.00  -1.00
500.00  0.10
1000.00  0.50
1500.00  -0.50
2000.00  1.11