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INTRODUCTION
Thank you for purchasing the digital audio format and sampling rate
converter FORMAT CHANGER advanced from MUTEC GmbH.
General function description
The FORMAT CHANGER advanced from our SMART DIGITALs Series helps
you interconnect digital audio devices with different transmission formats,
sampling rates and connecting elements. The standard version is equipped
with S/PDIF (optical and coaxial) and AES/EBU interfaces.
The format-only conversion involves not only the necessary electrical
conversion but also a format conversion of the signals, in compliance with
the specifications standardized by the Audio Engineering Society (AES) and
the International Electrotechnical Commission (IEC). The signal from the
selected input is converted in its format and simultaneously sent to all three
output interfaces.
In sampling rate conversion mode the FORMAT CHANGER advanced can be
Word Clock or Word Clock x 256 (so-called Super Clock) synchronized exter-
nally as well as through an audio signal provided at any one of the freely
selectable audio inputs. If no external sync signal is available, the unit can be
set to internal synchronization mode with six different reference frequencies.
Basically, all operating modes allow you to process signals with a sampling
rate ranging from 32 kHz to 108 kHz and a word length of up to 24 bits
(linear, input and output). When synchronized externally, the FORMAT
CHANGER advanced offers a varispeed function for the frequency range
mentioned above.
In addition to the real-time sampling rate display of incoming audio or
clock signals, various operating statuses can be controlled visually by means
of status LEDs. SCMS copy bits can be placed or filtered manually. Addition-
ally, the status of incoming SCMS copy bits (original or 1st generation) is
signaled by LEDs.
In all operating modes, constant jitter, level and edge compensation is
applied to all outgoing signals.
Features
Conversion of the two standardized 2-channel digital audio formats
S/PDIF (optical and coaxial) and AES/EBU.
Simultaneous format conversion on all three outputs with one audio
input selected as the signal source.
Real-time sampling rate conversion, independent of the incoming sam-
pling rate and with six selectable frequencies available (32 kHz 96 kHz).
External synchronization based on Word Clock, Word Clock x 256
(so-called Super Clock) or the clock frequency of a digital audio signal
present at any one of the freely selectable audio inputs.
Interface conversion: OPTO CINCH XLR.
Varispeed-compatible with frequencies from 32 kHz through 108 kHz.
Hard-bypass of sampling rate converter allows format-only conversion.
Real-time frequency analysis and indication of the sampling rate of incom-
ing audio signals or of clock signals used for external synchronization.
Placing/filtering of SCMS copy bits, incl. status display.
Jitter, level and edge compensation applied to all outgoing signals.
Last function selected is retained after power-down.
Applications
Realtime format and sampling rate conversion
Integration of non-synchronizable devices into digital studio
environments
Jitter reducing and signal stabilization
Clock extraction
Variation of SCMS copy bits
Signal distribution
7
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with an exclamation mark in the
inside should be read carefully!
These include additional information which
are of major importance for the functional
descriptions in the text column.
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informationen for the corresponding
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the individual box refers to the description
in the text column beside the box.
