Operation - M-Audio Flying Calf Manual

After all connections are made, power up the Flying Calf by
pressing the power button on its front panel.
IMPORTANT: Before powering up the Flying Calf, turn off or
turn down any amplifiers, mixers, or audio converters connect-
ed to the Flying Calf's S/PDIF output. Since it may take several
milliseconds for the Flying Calf to output valid S/PDIF, you
may hear a slight "pop" or "buzz" sound while powering up if
you are monitoring the S/PDIF out .
A typical configuration in which a Flying Calf would be used
includes a Calf, a PC-based digital I/O card, a mixer and an
amplifier/sound system. Such a configuration could be setup as
follows: 1.) the stereo line-level audio outs of the mixer goes into
the analog ins of the Calf, 2.) the S/PDIF out of the Calf goes to
the S/PDIF in of the digital audio card, 3.) another audio out of
the mixer may go to an amplifier/sound system or alternately to
an audio out of the audio card can go to an amplifier/sound sys-
tem.

Operation

The Flying Calf A/D converter accepts analog audio from the left
and right Analog In jacks. These 1/4" audio input jacks expect
unbalanced (tip-sleeve) signals. The analog signals pass through
some analog buffers to the A/D converter, where the audio is dig-
itized at the current sample rate. The A/D converter then drives
the Input Level displays and sends the digitized audio data to the
S/PDIF transmitter. The transmitter formats and outputs the
actual S/PDIF data stream through a transformer to the S/PDIF
Out jack.
The A/D converter always digitizes the analog data at the sample
rate that is set from the front panel of the Flying Calf. When the
Sample Rate select button is in the "out" position, the sample rate
is 44.1 kHz. If the button is in the "in" position, the sample rate is
48 kHz. The current sample rate is always indicated by the front
panel Sample Rate LED's.
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