User guide

When you are finished recording the digital signal, you should set your Sync Mode to Internal for Pro Tools playback.
There are exceptions to these guidelines, especially when working with expanded systems, external synchronizers,
and optical devices. Please refer to the appropriate installation guide when using expanded systems or additional
devices.
888/24 I/O Index | All FAQ Index
[6240]
How do I change the operating level of the 888/24 from +4 to -10?
The 888/24 I/O is factory set to +4 dBu operating levels for input and output. You can individually switch any of the
analog inputs or outputs to either a +4 dBu or -10 dBu operating level by moving internal jumpers on its circuit
board.
This requires careful removal of the 888/24’s top cover physically moving the jumpers corresponding to each input
and output.
Please refer to the 888/24 I/O Installation Guide for specific instructions and guidance.
888/24 I/O Index | All FAQ Index
[6241]
Why would I want to change the operating level of my 888|24? What’s the difference?
It is important to determine which line level is appropriate for you studio equipment. Setting the +4 or -10 dBu
operating levels help determine the input and outputs loads a particular piece of equipment can handle or deliver.
+4 dBu is generally considered "professional" and -10 dBu "consumer". Some processors, etc. can be toggled
manually between +4 and -10 dBu via an external switch or internal jumper (such as the 888/24). However, many
are permanently set. Check the owner’s manual for you mixer, amplifiers, or effects processors to determine the
correct operating level for you studio’s equipment.
888/24 I/O Index | All FAQ Index
[6248]
When or why should I calibrate my 888/24’s inputs and outputs?
The 888/24 is factory calibrated so that it’s operating level is +4 dBu with 18 dB of headroom nominal at full code,
unity gain, making calibration unnecessary for most professional applications. However, you may want to calibrate
the inputs and outputs of the 888/24 to the operating level of your mixing console, so that the output meters of the
888/24 match the levels of your console. Additionally, you may want to re-calibrate you interface if you feel that
the inputs or outputs of your 888/24 are not recording or playing back at equal levels.
Please refer to the 888/24 I/O Installation Guide for specific instructions and guidance.
888/24 I/O Index | All FAQ Index
[6246]
I set the Infinite Peak Hold preference in Pro Tools, but the meters on my 888/24 haven’t changed,
why?
In the Display Preferences, the Peak Hold options only affect the meters within Pro Tools (on screen).
The Peak Hold and Level Sensitivity settings for the 888/24 meters are available in the Other Options dialog box
from within the Hardware Setup window:
Setups > Hardware > Other Options
888/24 I/O Index | All FAQ Index
[6244]
How do I enable/disable DAC muting when using Stand Alone mode?
In certain cases, you may wish to mute the 888/24’s Digital-Analog Converters when in Analog-Digital Stand Alone
mode. This is useful if, for example, you need to eliminate potential external analog feedback through a console.
This procedure requires careful removal of the 888/24’s top cover and physically moving the jumper corresponding
to Stand Alone DAC muting.