Start-Up
- Power on the Tascam mixer using the power switch at the back right.
- If off, plug in the silver audio interface underneath the BigKnob. The barrel plug is on the back.
- Power on the control room speakers using the buttons on the back.
- Power on the lab stereo speakers next to the TV’s using the buttons on the back.
Inputs
The talkback system can receive audio from the following sources:
- Channel 1: Control room talkback mic
- Press the button labelled ‘Mute’ on the BigKnob to mute the talkback mic
- Channel 2: default not used
- Channels 3-4: lab ceiling mics
- Channel 5 (USB): MoCap PC (mono only)
- Channel 6 (Phone): Audio PC OR minijack (stereo)
- Flip the marked switch on the back to select between minijack input (left) and Audio PC input (right)
- Channel 7 (Bluetooth): default not used
- Channel 8: internal SFX, default not used
To mute an input: press the channel’s mute button at the top of of the channel strip
Outputs
The talkback system can send audio to both the control room speakers and the lab stereo speakers either side of the TV’s. Output levels are controlled using the rotary dials above the Tascam screen.
- Rotary dial 1 (2x mono line out): Control room stereo speakers
- Rotary dial 2 (headphone 1): default not connected
- Rotary dial 3 (headphone 2): default not connected
- Rotary dial 5 (headphone 3): default not connected
- Rotary dial 5 (headphone 4): Lab stereo speakers
Headphone outputs 1-3 can be used for extra headphones in the control room. The corresponding headphone ports are on the back of the Tascam mixer.
Troubleshooting
No signal from the talkback mic:
Ensure the silver audio interface beneath the BigKnob is plugged in. It does not have a power switch, so the barrel plug on the back must be manually plugged and unplugged.
No audio from Audio PC / minijack:
Check the position of the switch for Channel 6 on the back (left = minijack, right = Audio PC).