Choosing an Audio-Technica 3.5mm Microphone

Before you start

An Audio-Technica microphone with a 3.5mm connector is designed to plug directly into a compatible camera, phone, tablet, computer or portable recorder. The connection is local; no account or online service is required to record audio. The connector must match the device input. Many lightweight on-camera models end in a 3.5mm TRS plug, while a model designed for phones may use a 3.5mm TRRS plug with a fourth contact to carry mic signal and headphone signal. Check the device specification for microphone input support and whether a TRS or TRRS plug is required.

Some models require plug-in power, which a camera or recorder usually provides through the 3.5mm input. This is separate from phantom power on XLR interfaces. A phone, tablet or computer with a combined headset jack may supply bias power for a compatible mic input. If the microphone is battery-powered, install fresh batteries before testing and turn the mic on when needed.

Step-by-step instructions

1) Decide where the microphone will be used. A compact on-camera model with a shock mount and foam windscreen is practical for video recording. A lavalier model is better suited to speech when the subject is not close to the camera. For music, conversation or close-range voice work, consider whether the mic needs to run from battery power or plug-in power.

2) Check the diameter and stability of the 3.5mm plug. A standard 3.5mm plug should fit the device input without an adapter. If the microphone is for a camera with a locking mic input, a connector with a screw lock may improve mechanical stability, but confirm compatibility with the camera before buying.

3) Match the connector type to the device. A TRS mic cable is commonly used with camera mic inputs. A TRRS cable is designed for headset jacks that accept both mic input and headphone output. Using a TRRS mic in a TRS input can produce weak or unusable sound, so avoid relying on a random adapter unless the manufacturer confirms the wiring.

4) Set the microphone as the input device in the recording app or operating system when using a computer or mobile device. Keep the input level conservative at first and raise it only if the recording is weak. A high input level can distort speech before the problem is visible on the screen.

5) Set the sample rate consistently across the app and system settings. Common settings for speech and video include 44.1 kHz or 48 kHz. Matching the sample rate avoids pitch or sync problems in some software. Do not change the sample rate during recording.

6) Position the microphone close enough to the sound source to reduce room noise, but far enough to avoid breath noise or bumps. For an on-camera mic, use the camera's headphone output if available to monitor the signal while recording.

Check the output

Record a short clip of normal speech and play it back at the intended volume. Listen for consistent level, obvious rustle or handling noise, and severe background noise. The meter in the recording app or camera should show activity without staying at the maximum level. If the waveform is clipped, reduce the input level and test again.

The output is an audio file in the format supported by the recording device or app. Use for purposes that match the file's format and settings; do not expect a 3.5mm microphone alone to change the recording format or produce a digital file without a connected recorder or device.

Common problems and next steps

If the recording is silent, check whether the connected port is actually an input device. A headphone jack can look identical to a headset jack. In a computer or phone, the operating system may still select the built-in microphone until the new input is chosen manually. An output device setting or muted input can also cause silence.

For weak or thin sound, check for a TRS and TRRS mismatch, low battery power or plug-in power that is disabled. Move the microphone closer to the source before raising the input level. A tiny change in position often reduces background noise more effectively than a high input level.

If the audio hums or crackles, test the cable and connector by moving them gently while monitoring. Replace a damaged cable with the cable type specified by the manufacturer. Keep the cable away from power supplies and devices that may introduce electrical noise.

For music, camera vlogging or phone interviews, use a model with the form and connector suited to that task. A lavalier for a phone may not be the best choice for stereo ambience on a camera, and an on-camera mic may be too bulky for a phone. After changing any device or cable, run another short test recording.