360 Systems DigiCart/II Plus User Manual

Page 42

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Operating Instructions

DigiCart/II Plus Owner's Manual

DigiCart/II Plus stores the sample rate as part of a cut's header and will always read the header to
configure itself for correct playback. Digital recordings use the selected format but ignore the
selected sample rate because the sample rate is specified by the incoming digital data.

Once cuts have been recorded, they cannot be converted from one format to another.

D

OLBY

®

AC-2

C

ODING

The default recording format of DigiCart/II Plus is Dolby AC-2 at a sample rate of 48kHz.
Compared to 16-bit linear coding on DigiCart/II Plus, AC-2 stores more than five times as much
audio. When AC-2 is selected, digital audio is processed through a data compression algorithm that
reduces the amount of data necessary for high quality audio. On playback, a complementary
process decodes the AC-2 information, delivering digital audio in a linear format to the D/A
converters. The dynamic range and frequency response of 16-bit linear recording is not diminished
by the use of AC-2.

To achieve the maximum amount of storage time on your DigiCart/II Plus, you should record with
AC-2. Recording with AC-2 uses about one-fifth the amount of storage space as a comparable linear
recording.

Note: The sample rate and format must be set to DOLBY AC-2 48000 for 48K digital inputs to be
compressed with Dolby AC-2. Dolby AC-2 compression is not available for the 32K and 44.1kHz.

S

TEREO

A

ND

M

ONO

R

ECORDING

A cut can be recorded in stereo or mono. Mono recordings will play back on both output channels
simultaneously. When recording a mono signal, it should be fed into the Right channel.

Recordings made in the Dolby AC-2 format are "stereo only," however, mono material may be
recorded on one or both AC-2 channels.

S

ELECTING

S

AMPLE

R

ATE

A

ND

F

ORMAT

1. By pressing the SETUP MENU button and rotating the select knob to Sample Rate

and Format, you may use the Left and Right Position buttons to choose between:

SAMPLE RATE & FORMAT

DOLBY AC-2

48000

OR

SAMPLE RATE & FORMAT

48000 STEREO

OR

SAMPLE RATE & FORMAT

48000 MONO

OR

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