spdif

[geordie101]

hi,We have a plan to generate a digital audio signal that represents a 20 kHz analog sinewave, and encode this in SPDIF bi-phase protocol. We would like to generate this from a high speed DI/O card, connect this to the SPDIF
IN on a M-Audio Delta 1010LT soundcard, and then use the resulting
analog waveform from the soundcard (amplified) to modulate a set of
current carrying coils. From my understanding the SPDIF
format contains clock information, so that doing it this way allows us
to (possibly!?) have a common clock for the audio and for other devices
in the system, and avoid any timing problems using the sound VI's in
LabView. Has anyone got any suggestions if this is possible, and if
anything exists on using a DI/O card to generate digital audio/SPDIF and encode the clock signal?Cheers,Mark

[David L.]

Hi Geordie,


Our cards are not pre-configured to output SPDIFF signals. However,
there are discrete chips on the market which can take a digital input and clock and create
the SPDIFF audio format out.

[David L.]

Geordie,




The output rate (10Mhz) will be dependant on what D I/O card
you have. I do not know enough about SPDIF to understand why there is a
limitation at 48Khz, but will try to help you out the best I can on the
National Instruments side of your project.