Hi Greg, thank you for your work. I’ve been using House Curve and it’s very good, but I’ve been using it with my iPhone’s microphone because I bought a Umik microphone but it broke after two readings. Now I’d like to know if using AirPods Pro to record is better or worse than using the iPhone’s internal microphone? Thank you.
I don’t think the AirPods will work? I just tried with my own set and the app still wants to use the iPhone microphone. I’d just use one of the internal mics. They should all measure about the same (go to measure setup to choose).
Also… be careful about measuring with AirPods in your ear… I just blasted a sweep into my head 
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Hi Greg,
I’m using HouseCurve with an iPhone 15 and a Dayton Audio iMM-6C (USB-C) external microphone (with its calibration file). I’m generating convolution (FIR) filters for Roon and I’d like to use the Harman target curve.
For this mic + iPhone setup, what frequency range do you recommend for the correction that HouseCurve computes (i.e., the “from/to” limits for the FIR correction)? Specifically:
- What low-frequency limit is generally safe/effective (e.g., 40 Hz vs 60 Hz vs 80 Hz)?
- What high-frequency limit do you recommend before room reflections/measurement uncertainty make it counterproductive (e.g., 300–500 Hz vs higher)?
Any guidance on a good default range for “Harman in-room” correction with iMM-6C would be much appreciated.
Best regards
Hello
I think it depends on the lowest extension of your loudspeakers
My Focal Aria 936 are 39hz
With the help of an audiofriend we tried 30 - 300hz, 40 - 400hz and 30 - 13000hz filters
Preferred 40 - 400hz
Succes
Enjoy…
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Do not boost frequencies below your speaker’s natural limit. It won’t work and can damage speakers and amps
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Hi, thanks — that’s a really helpful data point :))
Quick questions to better replicate your approach:
Did you cap Max Gain (e.g., +3 dB / +6 dB) or use Allow only cuts?
Did you use Harman + Target Curve Fit = Auto in HouseCurve?
How many measurement positions did you average, and was it a sweep-based measurement (not real-time RTA)?
Did you export All Rates for Roon (ZIP with multiple sample rates)?
Thanks again!
Hello,
1/ Allowed gain and cuts (adjusted headroom in Roon to - 6db to avoid clipping)
2/ Forgot the name of my target curve (not Harman)
3/ 5 different sweeps or more at and around earlevel seating position
4/ Yes
Succes
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It was B&K curve 
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Hi, thanks — this is very helpful.
Good to know you preferred 40–400 Hz and kept both cuts and boosts enabled (with −6 dB headroom in Roon). I’m going to A/B test 40–400 vs 60–500 using a Harman target curve in HouseCurve.
Quick follow‑up: do you remember which target curve you used (Flat / Room / Diffuse / etc.) and what mic you measured with (phone internal or calibrated external)?
Thanks again!
Ok, tnx
Lot of information here. Been looking at using housecurve and a plug in mic. Started with the demo version to work out what /if it’s needed.
If I am honest not 100% sure I know what I am looking at
Done a few sweeps and don’t even know if it’s worth buying the app to tune roon or not
Get curves that look like the below.
Will look at a usbc mic and a subscription/ purchase of the app