Hello;
In case you want to generate the digital data stream/oversample/digital filter in software and then produce the resulting analog output waveform from the NI 6715, you will need to be concerned about the loop rate you can achieve in Software.
Since you will be generating one analog output data point per bitstream, you will need to do a point by point analisys, and depending on how fast you need to go, the Software loop might not keep up with that rate.
Hope this helps.
Filipe A.
Applications Engineer
National Instruments