It is impossible to measure the frequency response of Edifier R1700BT speakers

[Kisliy]

Hello! It seems I have caught a big bug in REW -_-
I bought a UMIK-1 microphone and Edifier R1700BT speakers, decided to measure the frequency response using REW 5.31.5 and it didn't work.
When measuring at a frequency of 7 kHz a break occurs. After measuring, the subsequent signal through REW is not played until you feed the sound through another program/player. Moreover, before this, I successfully measured the frequency response of headphones and did not observe any such problems.
I will attach a graph, a video and a screenshot of the settings. The speakers were connected via RCA cable to the Topping EX5 DAC.

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[John Mulcahy]

Use the output device name that starts with EXCL. Note that some DACs mute their output after a short time if one channel doesn't have a signal.

 

[Kisliy]

Use the output device name that starts with EXCL. Note that some DACs mute their output after a short time if one channel doesn't have a signal.

I tried to select a device starting with EXCL, but the test still stopped at 7 kHz.
Then I checked all the devices for auto-switching off when a signal was applied to only one channel, they all continued to work and did not fall asleep.
I decided to use the built-in audio card, the measurement was successful! Then I returned to the DAC Topping EX5 and selected the output channel L+R, instead of R, and the measurement was successful! I still did not understand the connection between the channel selection and the device, but I am happy with the result. Thanks for trying to help John

 

[John Mulcahy]

If the problem is DAC muting they often only check one channel for the presence of data, typically the left.