Problem with Apple FaceTime

[serieux-carottiers7x]

Please Confirm

• I have read the FAQ and Wiki where most common issues can be resolved
• I have searched Discussions to see if the same question has already been asked
• This is a bug and not a question about audio routing or configuration, which should be posted in Discussions

macOS Version

macOS 15 Sequoia

BlackHole Build(s) Affected

• 2 channel
• 16 channel
• 64 channel
• other/custom build

Describe the bug

my problem is similar of the "MacOS defaults to BlackHole as a mic #865".
The difference is that indifferently of my mic source, when the audio output is BlackHole, the mic output seems to reduce in FaceTime to an unusable level(but the mic config level in setting or midi app didn't change).

For reference, I only use FaceTime to call phone number thro my iPhone from my Mac.
I didn't have the same problem in other app (Discord, PhotoBooth, ...)

I didn't have any problems when BlackHole is not selected as output (I have selected my MacBook mic as default (same if I chose any other mic connected))

Reproduction Steps

1. change BlackHole as output
2. call someone phone number with an iPhone (phone n°1) thro the Mac
3. barely no sound output from the phone called (phone n°2) (the phone n°2 in question works perfectly) 👎🏻
4. retry the last step without BlackHole as output
5. perfectly working 👍🏻

Expected Behavior

calling call someone phone number with an iPhone (phone n°1) thro the Mac, but without the input sound problem

Screenshots

No response

[devinroth]

That’s a result of FaceTime blocking BackHole or with their echo reduction. No way around it as far as I can tell. Devin

…

On Feb 7, 2026 at 1:11 PM -0800, serieux carottiers ***@***.***>, wrote: serieux-carottiers7x created an issue (ExistentialAudio/BlackHole#882) Please Confirm • I have read the FAQ and Wiki where most common issues can be resolved • I have searched Discussions to see if the same question has already been asked • This is a bug and not a question about audio routing or configuration, which should be posted in Discussions macOS Version macOS 15 Sequoia BlackHole Build(s) Affected • 2 channel • 16 channel • 64 channel • other/custom build Describe the bug my problem is similar of the "MacOS defaults to BlackHole as a mic #865". The difference is that indifferently of my mic source, when the audio output is BlackHole, the mic output seems to reduce in FaceTime to an unusable level(but the mic config level in setting or midi app didn't change). For reference, I only use FaceTime to call phone number thro my iPhone from my Mac. I didn't have the same problem in other app (Discord, PhotoBooth, ...) I didn't have any problems when BlackHole is not selected as output (I have selected my MacBook mic as default (same if I chose any other mic connected)) Reproduction Steps 1. change BlackHole as output 2. call someone phone number with an iPhone (phone n°1) thro the Mac 3. barely no sound output from the phone called (phone n°2) (the phone n°2 in question works perfectly) 👎🏻 4. retry the last step without BlackHole as output 5. perfectly working 👍🏻 Expected Behavior calling call someone phone number with an iPhone (phone n°1) thro the Mac, but without the input sound problem Screenshots No response — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[serieux-carottiers7x]

strange, because, That something that need to be manually activate for the other app (with an option call something like Voice isolation )

[serieux-carottiers7x]

that not very logic, because the mic didn't change, only l'output Mac side

[devinroth]

There is another issue that extensively discusses this. But my top theory is Apple is blocking Loopback devices. No other app has this issue. Devin

…

On Feb 7, 2026 at 1:19 PM -0800, serieux carottiers ***@***.***>, wrote: serieux-carottiers7x left a comment (ExistentialAudio/BlackHole#882) that not very logic, because the mic didn't change, only l'output Mac side — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.Message ID: ***@***.***>

[gchilds]

You could try changing blackhole’s uid and name and see if that makes it work

…

On Sat, 7 Feb 2026 at 10:19 pm serieux carottiers ***@***.***> wrote: *serieux-carottiers7x* left a comment (ExistentialAudio/BlackHole#882) <#882 (comment)> that not very logic, because the mic didn't change, only l'output Mac side — Reply to this email directly, view it on GitHub <#882 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQLZLKODXPKMP2ZPFU5CKL4KZJF5AVCNFSM6AAAAACULBJGR6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQNRVGUYDCMBTGI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[serieux-carottiers7x]

how ?

[gchilds]

Maybe also change the transport type to usb

…

On Sat, 7 Feb 2026 at 10:23 pm Devin Roth ***@***.***> wrote: *devinroth* left a comment (ExistentialAudio/BlackHole#882) <#882 (comment)> There is another issue that extensively discusses this. But my top theory is Apple is blocking Loopback devices. No other app has this issue. Devin On Feb 7, 2026 at 1:19 PM -0800, serieux carottiers ***@***.***>, wrote: > serieux-carottiers7x left a comment (ExistentialAudio/BlackHole#882) > that not very logic, because the mic didn't change, only l'output Mac side > — > Reply to this email directly, view it on GitHub, or unsubscribe. > You are receiving this because you commented.Message ID: ***@***.***> — Reply to this email directly, view it on GitHub <#882 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQLZLIRCVNG4ZGS2QZAOML4KZJTTAVCNFSM6AAAAACULBJGR6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQNRVGUYDKNRVG4> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[serieux-carottiers7x]

Maybe also change the transport type to usb
…

how? X2 😂

[gchilds]

By changing the black hole code and recompiling it and reinstalling

…

On Sat, 7 Feb 2026 at 10:24 pm serieux carottiers ***@***.***> wrote: *serieux-carottiers7x* left a comment (ExistentialAudio/BlackHole#882) <#882 (comment)> how ? — Reply to this email directly, view it on GitHub <#882 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQLZLIPSKUMUACX4UQRF5D4KZJXDAVCNFSM6AAAAACULBJGR6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQNRVGUYDMNZUGM> . You are receiving this because you commented.Message ID: ***@***.***>

[devinroth]

I think that worked as long as the uids didn’t contain BlackHole which means my blocking theory. Worth a test. Devin

…

On Feb 7, 2026 at 1:24 PM -0800, Gordon Childs ***@***.***>, wrote: gchilds left a comment (ExistentialAudio/BlackHole#882) Maybe also change the transport type to usb On Sat, 7 Feb 2026 at 10:23 pm Devin Roth ***@***.***> wrote: > *devinroth* left a comment (ExistentialAudio/BlackHole#882) > <#882 (comment)> > There is another issue that extensively discusses this. But my top theory > is Apple is blocking Loopback devices. No other app has this issue. > > Devin > On Feb 7, 2026 at 1:19 PM -0800, serieux carottiers ***@***.***>, wrote: > > serieux-carottiers7x left a comment (ExistentialAudio/BlackHole#882) > > that not very logic, because the mic didn't change, only l'output Mac > side > > — > > Reply to this email directly, view it on GitHub, or unsubscribe. > > You are receiving this because you commented.Message ID: ***@***.***> > > — > Reply to this email directly, view it on GitHub > <#882 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AAQLZLIRCVNG4ZGS2QZAOML4KZJTTAVCNFSM6AAAAACULBJGR6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQNRVGUYDKNRVG4> > . > You are receiving this because you are subscribed to this thread.Message > ID: ***@***.***> > — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.Message ID: ***@***.***>

[serieux-carottiers7x]

your solution seem to be a bit complicated 😅
I did try aggregated with only blackhole on it I finally can hear my self on the phone n°2 but I just realized I never verrify if I can heard myself when I speak from phone 2 to my Mac 😅🤣

[gchilds]

[image: image.png]

…

On Sat, 7 Feb 2026 at 22:29, Devin Roth ***@***.***> wrote: *devinroth* left a comment (ExistentialAudio/BlackHole#882) <#882 (comment)> I think that worked as long as the uids didn’t contain BlackHole which means my blocking theory. Worth a test. Devin On Feb 7, 2026 at 1:24 PM -0800, Gordon Childs ***@***.***>, wrote: > gchilds left a comment (ExistentialAudio/BlackHole#882) > Maybe also change the transport type to usb > > On Sat, 7 Feb 2026 at 10:23 pm Devin Roth ***@***.***> wrote: > > > *devinroth* left a comment (ExistentialAudio/BlackHole#882) > > < #882 (comment)> > > There is another issue that extensively discusses this. But my top theory > > is Apple is blocking Loopback devices. No other app has this issue. > > > > Devin > > On Feb 7, 2026 at 1:19 PM -0800, serieux carottiers ***@***.***>, wrote: > > > serieux-carottiers7x left a comment (ExistentialAudio/BlackHole#882) > > > that not very logic, because the mic didn't change, only l'output Mac > > side > > > — > > > Reply to this email directly, view it on GitHub, or unsubscribe. > > > You are receiving this because you commented.Message ID: ***@***.***> > > > > — > > Reply to this email directly, view it on GitHub > > < #882 (comment)>, > > or unsubscribe > > < https://github.com/notifications/unsubscribe-auth/AAQLZLIRCVNG4ZGS2QZAOML4KZJTTAVCNFSM6AAAAACULBJGR6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQNRVGUYDKNRVG4> > > . > > You are receiving this because you are subscribed to this thread.Message > > ID: ***@***.***> > > > — > Reply to this email directly, view it on GitHub, or unsubscribe. > You are receiving this because you commented.Message ID: ***@***.***> — Reply to this email directly, view it on GitHub <#882 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQLZLKGVLUMUXGSYZVOD7L4KZKNPAVCNFSM6AAAAACULBJGR6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTQNRVGUYTGNZUGA> . You are receiving this because you commented.Message ID: ***@***.***>

[serieux-carottiers7x]

your solution seem to be a bit complicated 😅 I did try aggregated with only blackhole on it I finally can hear my self on the phone n°2 but I just realized I never verrify if I can heard myself when I speak from phone 2 to my Mac 😅🤣

fun fact, "I can heard myself when I speak from phone 2 to my Mac" don't work, I will need to find a another way😆

[serieux-carottiers7x]

i have question for you @devinroth, did Mac OS limit the number of app that can call in parallel a single mic ?