In the Pronunciation section of the Speexx portal, click on 'Audio settings':
Check the playback volume.
Adjust the microphone sensitivity and recording quality: Click on the gear and change the microphone if required (normally, the integrated microphone is selected by default) in the pop-up window that opens.
Also in this window, click on the screen-with-eye icon, and make sure our site is permitted to use the microphone (select "Allow"). Close this window and finally, adjust the sensitivity of the recording by moving the slider. Take the test recording.
In Google Chrome, you'll also see a camera icon after the browser bar. Click on it, select the microphone you want to use and allow access to our site.