yes it may. There are many "digital only" cards [RME].
For instance on board COAX/TOSLINK or cheap cards can have a lot of jitter...which degrades the sound [at least on audiophile level], for casual listening to movies that is probably ok.
RME are cards designed for audio recording and ASIO, where low latency is important (for live recording/playback) and low jitter is also recommended because many hardware (compressors, delays and other analog and dsp effects and processors) connected toghether multiplying the jitter during recording and post production.
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AFAIK DAC's of "audiophile level" uses asynchronous USB. Any other (HDMI, SPDIF)
high quality DAC has PLL circuit and it's own high grade quartz master clock, so they are jitter immune. In other case if one use mediocre audio system why bother about jitter.