Originally Posted by bommai
M-Code, I won't compete with you on knowledge about H/K receivers
However, in this case you are not completely correct. 247/347 supports 2.0 PCM through optical/coax/analog and HDMI and Logic7 can be applied to these. Logic7 can be applied to DD/DTS through coax/optical/HDMI also. However, these receivers also support 5.1 PCM through HDMI. I had a 247 and can confirm that. However, it cannot expand the sound field to 7.1 using Logic7 or Dolby PL IIx for PCM 5.1 content.
As per my post..
The Logic 7 within the 247 (& used by HK over the last several HK AVR generations) is for taking a 2-Channel stream which may be PCM or analog. The input digital
ports for the PCM stream can be optical, coax or HDMI and for the analog
it needs to be be the respective source L/R audio inputs. This runs on the Cirrus Logic DSP processors (4926, 49326, 49400), the more advanced full process
Logic 7 as found as the HK AVRs such as 435, 635, 445, 645 & 745 which uses a very powerful TI DSP processor (DA 610, 710) can do 2-Channel (PCM or analog) to 5.1or 7.1. But also can overlay
a DD or DTS 5.1 stream and output a revised
soundfield 5.1 using its own logic/steering software. Also the AVRs with the TI DSP can post-process
a 5.1 stream to 7.1 as well.
Hope that clears up any questions..
Just my $0.02..