MRC01
Major Contributor
I have a pair of Rode NT1A mics that I use for recording local acoustic music events. These mics have lower noise and distortion than the UMIK-1, but they have non-flat frequency response and they don't have individual calibration files. I created detailed calibration files for these mics, so I can now use them for room tuning. I have a pair and each measures slightly differently, so I created individual files for each. If you want a generic NT1A calibration curve just take the average.
NT1A Calibration Mic 1
NT1A Calibration Mic 2
How I created these: I measured my in-room system using Room EQ Wizard, at the same position & level with all 3 mics (using the UMIK-1's calibration file). I took 2 runs of each and averaged them, for consistency. I exported the response data from REW and differenced them in a spreadsheet, so if you apply the given deltas to the NT1A, their response exactly matches the UMIK-1. For example, in the files the value is about 9 dB at 60 Hz. This means the NT1A's response is +9 dB at 60 Hz, so you would subtract 9 dB to get "neutral".
That said, I'm not entirely sure of the results. Applying these corrections to the NT1A, their curves match exactly to the UMIK-1 in REW. That sanity-checks the calibration process. However, the NT1A response curves aren't even close to what Rode publishes for these mics, and it has a suspiciously large peak around 75 Hz, which makes me question the UMIK-1's accuracy or calibration in this range. Here's the resulting NT1A calibration, relative to the calibrated response of the UMIK-1.
Any tips to help resolve this suspicion?
NT1A Calibration Mic 1
NT1A Calibration Mic 2
How I created these: I measured my in-room system using Room EQ Wizard, at the same position & level with all 3 mics (using the UMIK-1's calibration file). I took 2 runs of each and averaged them, for consistency. I exported the response data from REW and differenced them in a spreadsheet, so if you apply the given deltas to the NT1A, their response exactly matches the UMIK-1. For example, in the files the value is about 9 dB at 60 Hz. This means the NT1A's response is +9 dB at 60 Hz, so you would subtract 9 dB to get "neutral".
That said, I'm not entirely sure of the results. Applying these corrections to the NT1A, their curves match exactly to the UMIK-1 in REW. That sanity-checks the calibration process. However, the NT1A response curves aren't even close to what Rode publishes for these mics, and it has a suspiciously large peak around 75 Hz, which makes me question the UMIK-1's accuracy or calibration in this range. Here's the resulting NT1A calibration, relative to the calibrated response of the UMIK-1.
Any tips to help resolve this suspicion?