MOTU 8pre User's Guide download pdf (Page 45)

CHAPTER

10 Reducing Monitoring Latency

OVERVIEW

When operating the 8pre as an audio interface,

monitoring latency is that slight delay you hear

when you run an input signal through your host

audio software. For example, you might hear it

when you drive a live mic input signal through a

reverb plug-in running in your audio sequencer.

This delay is caused by the amount of time it takes

for audio to make the entire round trip through

your computer, from when it ﬁrst enters an 8pre

input, passes through the 8pre hardware into the

computer, through your host audio software, and

then back out to an 8pre output.

If you don’t need to process a live input with

plug-ins, the easiest way to avoid monitoring

latency is to use the 8pre’s CueMix DSP feature to

patch the input directly to your monitor outs via

the 8pre audio hardware. This is just like bussing

inputs to outputs in a digital mixer. For details, see

“CueMix DSP hardware monitoring” on page 49.

If you do need to process a live input with plug-ins,

or if you are playing virtual instruments live

through your 8pre audio hardware, you can

signiﬁcantly reduce latency — and even make it

completely inaudible, regardless of what host audio

application software you use. This chapter explains

how.

It is important to note that monitoring delay has no

effect on when audio data is recorded to disk or

played back from disk. Actual recording and

playback is extremely precise.

☛ Monitoring latency does not occur when

operating the 8pre as an optical expander (in

converter mode).

Monitoring live input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Adjusting the audio I/O buffer . . . . . . . . . . . . . . . . . . . . . . . 47

Lower latency versus higher CPU overhead . . . . . . . . . . 48

Transport responsiveness . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Effects processing and automated mixing . . . . . . . . . . . 49

CueMix DSP hardware monitoring . . . . . . . . . . . . . . . . . . . 49

Two methods for controlling CueMix DSP. . . . . . . . . . . . 49

Using MOTU CueMix Console . . . . . . . . . . . . . . . . . . . . . . . . 49

Controlling CueMix DSP from your audio software . . 49

!8pre Manual/Mac Page 45 Tuesday, October 12, 2010 5:52 PM

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