JRiver can decode HDCD. The file just needs to be tagged as HDCD. Use Audio Analyze to do that.
dBpoweramp will decode an HDCD and create a 24 bit file with the HDCD bits decoded. So, when you play it, the blue light on the DAC will not light, since the HDCD bits have already been decoded.
If you DAC decodes HDCD, you should let the DAC do it. The software decoders are attempts to duplicate what the chips in the DAC do, but they do an incomplete job.
dBpoweramp will decode an HDCD and create a 24 bit file with the HDCD bits decoded. So, when you play it, the blue light on the DAC will not light, since the HDCD bits have already been decoded.
If you DAC decodes HDCD, you should let the DAC do it. The software decoders are attempts to duplicate what the chips in the DAC do, but they do an incomplete job.