Why does my DJI Mic sound muffled, quiet or echoey?

A DJI Mic that sounds muffled is usually covered by clothing or hair, or rubbing against fabric. If it's quiet, the gain is set wrong between the receiver and your camera or phone. If it's echoey, the mic is too far from the speaker's mouth in a hard-walled room. Noise cancelling can also make voices sound thin or processed. Fix placement first, then gain, then the processing settings.

Fix DJI Mic sound — Most DJI Mic sound problems are placement and settings. Match the symptom to the first thing to change.

Muffled

Uncover the mic. The microphone opening must face out. A transmitter under a jacket, scarf or long hair loses its high frequencies.
Stop the rubbing. Clothing brushing against the mic makes rustle and thumps. Clip it to a firm collar or use the magnet so it doesn't swing.
Use the windscreen outside only. DJI recommends it outdoors or in wind. Indoors it's not needed. Make sure it's pressed on straight over the mic.
Try a lav. For a cleaner look and closer pickup on the Mic 2, plug a lavalier into the transmitter's 3.5 mm TRS input. DJI says to place the DJI Lavalier Mic 15 to 20 cm from the mouth.

Too quiet

Gain is set in two places: the transmitter or receiver, and your camera or phone. DJI's advice for cameras is to raise the receiver gain and lower the camera's input gain, which gives cleaner sound than the reverse.

Mic 2: press the receiver dial, then turn it to adjust gain. Recommended Camera Settings sets the receiver gain for your camera model. You can also raise Transmitter Gain, but DJI says to lower it if the level bar turns red.
Mic Mini: turn the receiver's dial. DJI's Instructions on Recommended Gain for Camera Setup explains how far to lower your camera's gain.
Safety Track: on the Mic 2, the right channel is 6 dB quieter by design. Use the left channel in your edit unless the main track clipped.
Mono vs Stereo: in Stereo, each speaker sits on one channel. A clip that seems quiet may simply have one voice per side.

Echoey or hollow

Echo is the room, picked up because the mic is far from the mouth.

Clip the transmitter on the chest, closer to the mouth.
Add soft surfaces: rugs, curtains, a couch. Bare walls and glass reflect sound.
If two speakers sit close together, each mic picks up the other person a moment later. Record in Stereo so each voice stays on its own track, and lower the off-speaker in the edit.
Turn off any other mic recording the same voice at the same time, such as the camera's built-in mic.

Sounds processed or "bad"

Noise cancelling removes background noise, but heavy processing can affect a voice. Toggle it and compare: on the Mic 2, press the transmitter's power button once (the yellow light shows it's on). On the Mic Mini, press the transmitter's power button. The Mic Mini has two noise cancelling levels. Its other settings live in the DJI Mimo app. Low Cut on the Mic 2 removes rumble under 100 Hz and is usually worth leaving on.

On the Mic 2, recording a 32-bit float backup in the transmitter gives you room to fix levels after the fact. More on settings is in DJI Mic 2 noise cancelling and DJI Mic Mini best settings. Compare both systems in DJI Mic 2 vs Mic Mini, or browse our microphones.