When using audio via HDMI or Analog (RCA), you can adjust the gain of incoming audio levels by going into the advanced settings of the BoxCaster. To find this, click on sources, click on the BoxCaster you want to change the audio on, click on edit settings, and lastly, the audio tab. This will allow you to adjust the gain of your BoxCaster by -3 or +3. You can do this mid-broadcast as well but we recommend testing this beforehand so it's at the level you desire.

When using analog audio (XLR or 1/4 inch), you can control the gain by tapping the Analog levels on the Audio screen. Use the knob on the screen to adjust the gain. If any additional gain is required, you must use external amplification.
​
This will only work with analog audio. This currently does not work if you are bringing in audio via SDI or HDMI.

Adjusting Gain Levels

Note: You are only able to do this if you are bringing in your audio via Balanced ¼” jacks or 3.5 mm stereo unbalanced line in.
​
Once your audio is plugged in, press on the audio block on the encoder.
​
This screen will show you your HDMI audio levels, Analog audio levels, and overall broadcast audio levels. You can adjust the analog audio levels by sliding the gain button to the right. You can check the volume by plugging in headphones to Spark. Once you get the audio to the desired level, press the X in the top right corner.
​

Adjusting the audio levels on Spark will help solve low audio inputs into the encoder. Still, we always recommend going back to the mixer and trying to increase the levels from there first.

Watch the video below to learn more about the differences between gain vs. volume. They are not the same, and this video will warn you against turning your gain to the max.

Adjusting Headphone Volume

To adjust the headphone volume, simply press the volume button on the touchscreen. You will then be able to use the slider to raise and lower the volume.