The sound at the scene is too noisy, so it is recommended to install a gun microphone. Because the gun microphone has a strong directivity, it only collects the sound towards the axis, and the noise such as the side is less collected. This can avoid the problem that the sound on the scene is too noisy. If you need to extract the recording directly from the mixer at the wedding scene, in fact, you only need to prepare an audio cable from rca to 3.5, connect the output from the mixer directly to the jack of your mobile phone, and then you can record with the mobile phone recorder. If you are worried about the memory space of your mobile phone, you can buy a portable hard disk burner, but it is generally more expensive.