Originally Posted by Kylan
my Denon is driving me crazy... I want to listen to cds, nothing fancy now, just music on my PS3 which is connected via HDMI... problem is this... i love the sound coming thru with the display reading.... multi ch pure direct.. however when it is on that setting my sub is dead as a hammer.
now.... when i click on the pure button on my remote.. it switches and says pure direct off... and reads multi ch in and then my sub kicks in.
First off, something is a little funny because you are listening to CD's which are 2-channel, yet the display is saying "MULTI CH". Do you have your PS3 set up for 5.1 or 7.1? I think it's sending 2-channel music as 5.1/7.1 with "blank" channels and the Denon is getting "tricked" into thinking it's multichannel content.
When you listen to CD's, look at how many squares are lit up on the left side of the Denon's display. Is it showing 2-channel or multiple channels?
but back to Pure vs. other stuff...
The DIRECT and PURE DIRECT modes are intended for PCM music, either 2-channel (from a CD) or multichannel (from an SACD or Blu Ray or something). The thing with these modes is that they apply no bass management at all, and as little processing as possible, whatever comes in on each channel is played on that channel.
DIRECT and PURE DIRECT share a common set of parameters, so if (for example) Audyssey EQ is on for DIRECT mode, it will still be on for PURE DIRECT mode. Any changes you make to one will affect the other. PURE DIRECT is just an "enhanced" form of DIRECT mode with even more circuitry shut off.
So, for example, with 2-channel music:
1. STEREO mode allows you to use tone controls, bass management, etc.
2. engaging DIRECT mode disabled tone controls, bass management, and other unneeded processing for a "purer" sound
3. engaging PURE DIRECT additionally turns off every last bit of unneeded processing, including the video circuits, display, etc. for an even "purer" sound than DIRECT mode.
For multichannel PCM, it's the same thing - MULTI CH IN > MULTI CH DIRECT > MULTI CH PURE DIRECT (in ascending order of "pureness"). But with the DIRECT/PURE modes you again lose bass management for multichannel content.
My theory is this: the PS3 is sending 5.1/7.1 and including "blank channels" for everything but the front L/R. When you engage DIRECT or PURE DIRECT mode, the Denon plays the music as straight passthrough, what comes in on a channel is played on that channel. In MULTI CH DIRECT mode, the sub will only make a noise if there is content on the discrete LFE (.1) channel.
So, since the sub channel is blank, and there is no bass management in PURE DIRECT mode, nothing comes out of the sub. When you hit STANDARD to engage MULTI CH IN, since your speakers are set at small, the receiver does normal bass management and you hear your sub.
So try this:
temporarily uncheck all the multichannel options from your PS3 and "force" it to send 2-channel to your Denon. Now, hit PURE DIRECT and see if you are getting the sub to make noise. Make sure that the SUBWOOFER=ON in the PARAMETERS menu for DIRECT/PURE mode...