User's Manual

Configuring Pro Tools 21
Function Switch Assignments
The Function Switch Assignments section shows whether or not the control assignments for the front panel buttons are enabled.
If a control assignment is not available, such as if Alt 2 (3–4) is disabled, the button on the front panel is unlit and the corresponding
icon in the Hardware Setup is grayed out.
Talkback Mic Gain
Adjust the knob or type a value (in dB) to set the talkback mic gain for when Talkback is engaged. Talkback mic gain can be set
to the following fixed values: 0, 6, 12, 18, 24, 30, or 36 dB. It defaults to 30 dB.
Dim Amount
Adjust the knob or type a value (in dB) to set the Dim level for when the DIM button is pressed on the front panel or when Talkback
is engaged.
Line I/O Page
Click the Line I/O tab in the Hardware Setup to view the Line I/O page. You can set whether each of the Line input channels bypass
input gain control. You can also set the reference level (+4 dBu or –10 dBV) for each of the analog outputs.
Line Input Gain
Select On to apply input gain control to the corresponding Line input (either XLR/TRS or DB25 inputs). Select Bypass to bypass
the input preamp for the corresponding Line input channel. Enable
Bypass when connecting an external preamp or line-level
source, and the most transparent signal path is desired. For any linked input pairs, the
Line In Gain setting is linked.
Line Output Reference Level
Select either +4 dBu or –10 dBV as the reference level for each analog output: MON L–R (TRS outputs) and LINE 1–8 (DB25 out-
puts). When connecting balanced audio gear, use +4 dBu. When connecting unbalanced audio gear, use –10 dBV.
Sample Rate
The Sample Rate indicator displays the current sample rate of the session for reference. The interface sample rate is determined
by Pro Tools or Core Audio. When Pro Tools is running, the sample rate is set by Pro Tools. When Pro Tools is closed, the sample
rate for Pro Tools | Carbon can be set in AMS. Pro Tools and third-party Core Audio applications cannot use different sample rates
for Pro Tools | Carbon at the same time. The default sample rate for Pro Tools | Carbon is 48 kHz.
Hardware Setup, Line I/O page
Do not attempt to change the device sample rate using AMS or a third-party Core Audio application while Pro Tools is running.