analog 5.1 home theatre is attached to pc. dsp settings are 5.1 jrrmixing ,subwoofer silent bitrate 24bits in exclusive mode. in exclusive mode jriver media 15 works like charm but above versions from jriver 16 to jriver 24 there is no sound in rear speakers only front channel and subwoofer are working but if exclusive mode is disabled then rear channel speakers start to work. so you dont get unmolested sound. i want jriver 24 to work in exclusive mode with all channels working
If your setup is as you describe, then you must have some Room Correction defined so that you get output from the Subwoofer, because you have set it to Silent. Either that or some Parametric Equaliser settings that remap your channel input to outputs.
If MC15 works correctly in 5.1, then MC24 will also work correctly. It is quite possible that something changed back in MC16 that now fails to direct output to your side speakers. You just need to change your settings to accommodate that change, which may have been speaker channel mapping, or the way Room Correction works, or similar.
So go into your DSP settings in MC24 and turn off
everything except "Output Format", which should be set to 5.1 with JRSS mixing (uncheck everything else). Then set the Subwoofer to a low pass filter of your choice. Then set the Audio Device to Exclusive Mode, as you have previously.
Now play a 5.1 media source. Did it work? Confirm this by listening at each speaker and checking the Audio Path in MC.
If not, you have the wiring from your PC to the Home Theatre unit done wrong. As the others have been saying above, you probably have the rear channels output from the PC connected to the side channels of the Home Theatre unit. The rear channels don't have any audio content in a 5.1 setup. The side channels do, but you don't have those connected to you Home Theatre. Fix that setup. You can do that in MC electronically as KR4 described, or in the PC soundcard setup (probably, well, maybe), or by physically changing the wiring connections.
If 5.1 sound did work correctly, your Room Correction or Parametric Equaliser settings must be wrong. Test this by turning on one at a time and see which one stop the 5.1 sound from working. When you know which is incorrect, fix it.
When everything in the DSP area is fixed, you can turn on everything you had set, and 5.1 Audio should work.