Story highlights The commission said the audio issues affected the sound level in the debate hall

Trump complained earlier in the week that his microphone wasn't functioning properly

Washington (CNN) The Commission on Presidential Debates revealed in a one-sentence statement Friday that Donald Trump's audio was impacted earlier in the week.

"Regarding the first debate, there were issues regarding Donald Trump's audio that affected the sound level in the debate hall," the commission said in a statement. No other details were immediately made available.

The statement provided no evidence that the audio issue affected the television audience of more than 80 million people.

To CNN producers inside the debate hall, it sounded as if Trump's audio was at a lower level at the beginning of several answers, perhaps as a result of him standing too far away from the microphone attached to his lectern. During the course of those answers, it appeared as if someone had increased the audio level, making Trump sound louder in the hall.

His audio level never seemed to stay low for an entire answer. The audio issue appears to have been limited to what was heard by the audience inside the debate hall, and the variations in audio were not heard by viewers watching the debate on television.

Read More