Room Correction Mics

[Steve Woodhouse]

Sorry for being a bit behind with this.

I know you can use RC with android phones now, and I believe with external mics.

Can you use external mics with an iPhone on WiiM RC? If so, which ones?

And is the WiiM RC calibrated to each mic? I know for HouseCurve you have to tell it which you’re using, and it compensates for each mic’s own profile.

Many thanks.

 

[Burnside]

Sorry for being a bit behind with this.

I know you can use RC with android phones now, and I believe with external mics.

Can you use external mics with an iPhone on WiiM RC? If so, which ones?

Yes. I used both Dayton iMM-6 and 6C on my two iPads depending on their connection

And is the WiiM RC calibrated to each mic? I know for HouseCurve you have to tell it which you’re using, and it compensates for each mic’s own profile.

Many thanks.

There’s still no means of importing calibration files, but there’s a school of opinion (I think @harkpabst among them) that state that the calibration file changes are so small as not to be significant for most situations.

 

[canard]

Yes. If used both Dayton iMM-6 and 6C on my two iPads depending on their connection



There’s still no means of importing calibration files, but there’s a school of opinion (I think @harkpabst among them) that state that the calibration file changes are so small as not to be significant for most situations.

on a reduced bandwidth which seems to be standard in the rc approach adopted by wiim <4kz
(as a reminder... the systematic opening of the calibration text files provided with your calibrated microphones is always interesting and easy to read... gives a fairly good idea of the effective curves at 0dg (see at 30dg ))
(ps bis reminder, the case of the versions on usb for 3.5mm differs because we do not know the behavior of the adc in phone or tablet, in the case of 3.5mm etc.)

 

[Steve Woodhouse]

Yes. If used both Dayton iMM-6 and 6C on my two iPads depending on their connection



There’s still no means of importing calibration files, but there’s a school of opinion (I think @harkpabst among them) that state that the calibration file changes are so small as not to be significant for most situations.

Cheers. How does one use a Dayton with an iPhone, given that it’s USB-C?

 

[Burnside]

Cheers. How does one use a Dayton with an iPhone, given that it’s USB-C?

The IMM-6C is usb-c, the IMM-6 is a TRRS headphone jack. I have both models.

 

[harkpabst]

There’s still no means of importing calibration files, but there’s a school of opinion (I think @harkpabst among them) that state that the calibration file changes are so small as not to be significant for most situations.

Guilty of having said exactly that and I stand by it. At least under the following preconditions:

• Use of a half decent microphone with known calibration file. Looking at the contents of this file you can see the frequency range that simply doesn't need correction.
• Limit correction attempts to that frequency range. The configuration options for RC in the WiiM Home App are a bit hidden away, not everyone seems to take note.
• We don't know the steepness of the weighting filter when setting the lower and upper limit. If the mic is good enough (+/- 0.5 dB certainty is) from e.g. 30 Hz to 3000 Hz, I would probably still add a 10% safety margin (setting 33 Hz to 2700 Hz).

Having said that, I'd still like to see support for importing cal files.

Cheers. How does one use a Dayton with an iPhone, given that it’s USB-C?

Easy, get an iPhone 15.

I would expect Lightning to USB-C adapters to work with the USB version, but don't take my word for it.

The TRRS version is known to work with Apple's own 3.5 mm "adapter" (which is actually an ADC and a DAC (?), I think.

 

[Steve Woodhouse]

Guilty of having said exactly that and I stand by it. At least under the following preconditions:

• Use of a half decent microphone with known calibration file. Looking at the content you can see the frequency range that simply doesn't need correction.
• Limit correction attempts to that frequency range. The configuration options for RC in the WiiM Home App are a bit hidden away, not everyone seems to take note.
• We don't know the steepness of the weighting filter when setting the lower and upper limit. If the mic is good enough (+/- 0.5 dB certainty is) from e.g. 30 Hz to 3000 Hz, I would probably still add a 10% safety margin (setting 33 Hz to 2700 Hz).

Having said that, I'd still like to see support for importing cal files.


Easy, get an iPhone 15.

I would expect Lightning to USB-C adapters to work with the USB version, but don't take my word for it.

The TRRS version is known to work with Apple's own 3.5 mm "adapter" (which is actually an ADC and a DAC (?), I think.

I upgrade my iPhone every two years, and I’m next due a kick up in spring. the 16 will probably be out by then, so I’ll almost certainly be getting a 15 or 16.

I don’t mind the shortest. The Dayton looks like it costs c.£20, which is peanuts.

 

[guy48065]

... The Dayton looks like it costs c.£20, which is peanuts.

For this reason I am skeptical that using a cheap mic without it's correction file is going to equal a $1000 flat-response lab mic.
"Good enough" probably isn't once you've painted yourselves into a corner claiming everything is perfect and transparent now.
And even if they ARE, your room isn't.
Support for importing mic calibration files should be a priority.

 

[Steve Woodhouse]

For this reason I am skeptical that using a cheap mic without it's correction file is going to equal a $1000 flat-response lab mic.
"Good enough" probably isn't once you've painted yourselves into a corner claiming everything is perfect and transparent now.
And even if they ARE, your room isn't.
Support for importing mic calibration files should be a priority.

As I often say, we need to get out the whole mindset of ‘it cost a lot more so it must be better.’

A ‘better’ mic might be accurate enough to spot a change in your room because you’ve moved a cushion 2 inches. That doesn’t mean you can hear the difference. And it certainly doesn’t mean no one is going to move the cushion back.

Dayton iMM-6 vs UMIK-1

Hi, please find below the measurements of UMIK-1 vs iMM-6. Configuration is as below. AVR - Denon x4700h Speaker - Polk ES-15 (L+R used for measurement) Sub - SVS SB 3000 Only the challenge I have faced is in impulse measurement. It does not measure the correct impulse with the use of acoustic...

audiosciencereview.com

 

[Chota]

Hello
so I would also try the room correction. But I have an Android phone.
1. can I use the IMM-6C with it?
2. make it a differenct to the internacl mic? (have an older Samsung phone)
3. could I use also the miniDSP UMIK-1 with my phone and WIIM?

sorry for dump questions but I am new to this stuff.

 

[Burnside]

Hello
so I would also try the room correction. But I have an Android phone.
1. can I use the IMM-6C with it?
2. make it a differenct to the internacl mic? (have an older Samsung phone)
3. could I use also the miniDSP UMIK-1 with my phone and WIIM?

sorry for dump questions but I am new to this stuff.

1. Yes
2. Yes it could make a difference as the mics on Android phones are many and various
3. Potentially, but I’m not sure if anyone has yet

 

[slartibartfast]

1. Yes
2. Yes it could make a difference as the mics on Android phones are many and various
3. Potentially, but I’m not sure if anyone has yet

Pretty sure some have used the UMIK 1. It just needs a USB C to USB C cable.

 

[Chota]

1. Yes
2. Yes it could make a difference as the mics on Android phones are many and various
3. Potentially, but I’m not sure if anyone has yet

Thank you.

 

[mt014]

I've read that airpods pro 2 will get an update and their mics will be stereo now or something like this, there will be possible using airpods pro 2 mics for calibration?

 

[slartibartfast]

I have mentioned before that I thought using my iMM6 mic with REW via a USB to TRRS converter gave an incorrect frequency response due to the USB to TRRS converter. I finally realised I could verify this by comparing the responses using AudioTool on my phone with the mic connected directly to the TRRS socket and then to the USB C input via the converter and a USB A to USB C adaptor. Results below. Purple trace is TRRS connection, Blue is USB. That is quite a dip between 50Hz and 2kHz.

 

[harkpabst]

3. could I use also the miniDSP UMIK-1 with my phone and WIIM?

Yes, definitely works.

 

[harkpabst]

I finally realised I could verify this by comparing the responses using AudioTool on my phone with the mic connected directly to the TRRS socket and then to the USB C input via the converter and a USB A to USB C adaptor. Results below. Purple trace is TRRS connection, Blue is USB. That is quite a dip between 50Hz and 2kHz.

Wow. I'd call that totally unusable with the converter in place.

Assuming it's not the USB A to USB C adapter.

 

[slartibartfast]

Wow. I'd call that totally unusable with the converter in place.

Assuming it's not the USB A to USB C adapter.

I expected to see the dip so I think the A to C adaptor is OK. I was thinking of applying a modified calibration file to compensate for the dodgy converter. Just to get more sensible results from REW. I can then compare results from REW with WiiM room correction. Not ideal but until I get a decent USB mic better than nothing.

 

[Wiimer]

I have mentioned before that I thought using my iMM6 mic with REW via a USB to TRRS converter gave an incorrect frequency response due to the USB to TRRS converter. I finally realised I could verify this by comparing the responses using AudioTool on my phone with the mic connected directly to the TRRS socket and then to the USB C input via the converter and a USB A to USB C adaptor. Results below. Purple trace is TRRS connection, Blue is USB. That is quite a dip between 50Hz and 2kHz.


View attachment 13149

Have you verified that the IMM-6 is picking up sound when connected via USB? (Have you verified that the phone's built-in microphone is not being used?)

But the results are consistent with my perception. And strangely enough, something similar happened when I connected the IMM-6 directly to the 3.5mm jack on my LG V60.
(Bass was significantly reduced when using apps other than Audio Tool on V60)

So I quit using IMM-6.

 

[slartibartfast]

Have you verified that the IMM-6 is picking up sound when connected via USB? (Have you verified that the phone's built-in microphone is not being used?)

But the results are consistent with my perception. And strangely enough, something similar happened when I connected the IMM-6 directly to the 3.5mm jack on my LG V60.
(Bass was significantly reduced when using apps other than Audio Tool on V60)

So I quit using IMM-6.

I was definitely using the USB mic. After connecting the first thing I did was tap it with AudioTool active to check it responded.