Specifications

mixers. Selecting the ‘–10’ setting sets up the channel(s) for -10dBV n o m i n a l

signal levels, commonly used with consumer equipment such as CD, MiniDisc,

cassette tape and DAT players. The ‘Consumer’ setting is preferred for semi-pro

audio equipment and some consumer equipment that is too ‘hot’ for the ‘-10’

setting. The ‘Consumer’ setting offers approximately 6dB more headroom than

does the ‘-10’ setting. Semi-pro and consumer devices’ signal levels vary from

m a n u f a c t u r e r-to-manufacturer and even product-to-product, so a little

experimentation between Consumer and –10 settings may be required for optimal

results.

NOTE: In order to pre s e r ve its high dynamic range and

minimize distortion, the Delta 66 does not have micro p h o n e

p re-amplifiers built into it. There f o re direct connection to a

microphone is not recommended. Instead run the microphone

signal through a microphone pre-amp (such as the Midiman

"Audio Buddy™") and then connect the pre-amp output to the

input of the Delta 66.

All analog jacks on the Delta 66 break-out box are of the 1/4” TRS (Ti p - R i n g -

Sleeve) variety. The TRS jacks allow connection to either balanced (typically

professional) or unbalanced (typically consumer or semi-pro) equipment. +4dBu

balanced configurations provide the highest performance and should be used

whenever possible. However, the Delta 66’s analog connections support

combinations of balanced and unbalanced, +4dBu, consumer, and –10dBV l e v e l

signals.

The Digital Monitor Mixer

The Delta 66 Digital Recording System has a hardware digital audio mixer built

into its PCI controller chip. It accepts digital audio streams from all hardware

inputs and all outgoing software audio devices, mixes them with 36-bit internal

precision and then provides the mixed output to one or more locations. For the

purpose of monitoring, the output of the mixer may be routed to the first set of

D e l t a 66 analog outputs (H/W OUT1/OUT2 as a stereo pair) and/or the S/PDIF

digital output. At the same time the mixer may be used for stereo mix-down, with

the mixer’s output recorded into the user’s application software. The digital audio

mixer is configured and controlled by the included Delta Control Panel Software.

The Patchbay / Router

In addition to the built-in monitor mixer, the Delta 66 Digital Recording Interface

includes an output patchbay/router. The patchbay/router allows each output (analog

or digital) to be connected to a variety of input sources. The Delta 6 6 ’s outputs

may accept audio from software sources (the output devices visible in your audio

software applications) or from hardware sources such as the analog and digital

inputs or the monitor mixer. This capability makes the Delta 66 quite flexible for

WAV output, monitoring, or directly connecting inputs to outputs for “system test”

purposes.