Mark Lanctot;184618 Wrote: > > the receiver's digital output does not go through the HDCD decoder > first, that only happens on playback. The digital output is > essentially connected to the active digital input electrically, that's > all.
Thanks Mark, and yes I meant to address you. In a receiver the file might go through DSP before the DAC, just like squeezebox. There is a block diagram of a receiver at TI.com, HDCD is implemented in DSP, so the end result is sent to any old 24 bit DAC. So if the DSP outputs simultaneously to the SPDIF/toslink out circuit as well as the DAC, the digital HDCD stream could be captured. Since the Sb3 goes from 16 bit output to 24 bit output when using no attenuation, versus digital attenuation in DSP, this made me think the word length of the SPDIF out on a receiver would vary with decoded versus non-decoded material (and obviously represent the decoded waveform). This could be tested with one of the test discs mentioned that has encoded or unencoded versions, but also by altering the LSB with Sb (use volume 99/100) and comparing the waveform (if you have something to capture it). Finding a soundcard that will record 24 bit digital is going to be the hard part, I suppose. Will a DVD recorder with digital in record 24 bit audio? So, to answer your question; The point would be the ability to send decoded HDCD 24 bit files to the SB internal DAC. Like the topic of the thread, but using hardware for the non-XP users. Of course this is all a stab, and I'm sure others here understand how DSP/SPDIF is implemented in consumer electronics much better than myself! -- Skunk ------------------------------------------------------------------------ Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=32967 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
