User Manual

REDUCING MONITORING LATENCY

ADJUSTING THE AUDIO I/O BUFFER

A buffer is a small amount of computer memory

used to hold data. For audio interfaces like the

828x, buffers are used for the process of

transferring audio data in and out of the computer.

The size of the buffers determines how much delay

you hear when monitoring live inputs through

your audio software: larger buffers produce more

delay; smaller buffers produce less.

Under Mac OS X, audio I/O buffer size is handled

by the host audio application (not the 828x Core

Audio driver). Most audio software applications

provide an adjustable audio buffer setting that lets

you control the amount of delay you’ll hear when

monitoring live inputs or processing them with

software plug-ins. Below are a few examples.

Figure 8-3: In Digital Performer and AudioDesk, choose Setup menu>

Conﬁgure Audio System> Conﬁgure Hardware Driver to open the

dialog shown above and access the Buffer Size setting. Refer to your

Digital Performer or AudioDesk manual for information about the

Host Buffer Multiplier setting.

2. CueMix FX immediately patches the

live mic signal directly to the main outs

(or other output), completely bypassing

the computer. This signal could be dry, or

with 828x effects processing, such as EQ,

compression or Classic Reverb.

3. Mic signal is mixed with the

main outs, and you can control

the volume (relative to the rest

of the mix) with the mic’s fader

in CueMix FX.

Figure 8-2: This diagram shows the signal ﬂow when using CueMix FX no-latency monitoring. Notice that this method does not process the

live input with plug-ins in your audio software. Instead, you can apply 828x effects, such as the reverb, EQ and/or compression.

1. Live input (from mic, guitar, etc.)

enters the MOTU interface.