How to hear the connected mic or headset sound in real time?
1. Check if the SC3 mixer is set up as the default input and output device in both system sound and software audio settings.
2. Make sure that the mic channel is not muted, in which the mute button doesn't turn on white light, and the microphone fader isn't all the way down to zero.
3. Turn on the MIC MONITOR. After that, the button will keep a solid white light.
4. If a headset is connected to the headset port while the mic is plugged into the XLR port, the headset will take priority of audio input. Thus, if you don't have the headset mic audio, just plug the headset into the headphone port instead for listening purposes.
5. Check whether your mic needs 48V phantom power or not. If yes, then turn on the phantom power with the 48V button, which will turn on white.
You can also refer to the video below to run the setup or troubleshooting process.
How to input background music with a phone or iPad connected to the line-in jack?
Just use the included 3.5mm TRS to TRS cable to connect between the headphone jacks of phones or iPads. But make sure it is the cable with two black poles on each end.
How to properly use the CUSTOM buttons?
Recording Step
Long-press the button until it turns on white light, which means that recording starts.
Keep pressing and holding the button.
Release the button to end the recording. Or the recording will automatically stop when it's over 15 seconds.
Playback Step
If you want to playback the audio, short-press the CUSTOM button. When the white light flashes, it indicates that the customized recording audio is playing.
If the white light does NOT flash, it indicates that there is no recorded audio to play.
Note: CUSTOM buttons have functions of recording and playback ONLY. They can NOT be set as any other functions, such as shortcut keys of the programs on the computer.
You can refer to the video below to record and playback by the CUSTOM buttons.
How to customize the recording button on SC3?
Connect the SC3 to the PC
Input Source of the Customized Recording Button
You can choose three ways to record: microphone Input, computer audio, and phone audio.
Use the bottoms：
Long-press the button. When the button turns white, the recording starts.
When you release the button, the recording ends and saves.
When you press the button again, the recording will play through your headphones and the output channel.
The button will blink when the recording is playing.
If it stays unchanged, it means there is no recording in this button. Each button can record up to 15 seconds of audio. Once the current button reaches its 15-second limit, you can switch to another button.