I already sent Marnatz an email describing my issues, but will note them here as well.
I have a Marantz SR 8001
I am using a PS3 with firmware version 1.5 installed for Blue Ray playback.
I am using a HD-AX1 with updated firmware for HD/DVD
I am using an Oppo 970 via HMDI for SD/DVD playback at 480i.
I am using a VP-50 to send a 720P/60 feed to my projector via HDMI.
Discrete 6.1 / 7.1 LPCM issues.
When using the PS3, playing BR Movie Descent the following happens. ..verified audio stream by using the PS3 Display button. The following is noted on the display - Linear PCM 7.1 CH 48 kHz 6.1 mbps
If I leave the 8001 in Auto surround mode, the display will read M-CH 5.1. The little PCM indicator box is lit on the display as well. The Discrete 6.1 box IS NOT lit.
At this point, I have NO surround back activity (verified by physically placing hand on drivers).
I can use all other surround formats with the exception of DTS and Circle Surround. (Even DTS-ES works.) When I select any of these other surround formats, I get surround back activity.
I also bought the PS3 game, Resistance Fall of Man to experiment. (I'm not a gamer, although now I can see the attraction after playing it on a 96 screen).
The results are the same with this game as they are with the movie Descent.
I also noticed two other odd things when playing these two BR sources.
1) The speaker indicator box that normally has one or more lit, is completely blank.
2) When I play a DTS-6.1 discrete channel SD/DVD movie (Blade III for example), a small box lights up on the Marantz display. Inside this little box, reads Disc 6.1. I do not see this box lit when I try to play one of the LPCM 6.1 disks.
HDMI output switching
There is no simple way to change the HDMI outputs from one to the other. Tech support indicated that a firmware fix was going to resolve this, but they did not know if there would be a discrete IR command for it.
Speaker indicator box
This is a 7.1 channel receiver. I just don't get why this box only has room for a 5.1 set up. This would be a good upgrade.
Default volume setting
I can not find out how to set this receiver up to have a default volume level when it is first turned on. I don't know about anyone else, but I don't think to turn the volume down if I have it cranked up to around 90 db's when watching a movie and turn the receiver off. Then I go to turn on the TV the next day and get the piss scared out me.
Independent channel adjust
To have the ability to set the X-over settings differently between speaker groups is an excellent feature. Both Denon and HK have this. Can Marantz add this with firmware?
Many owners live great distances from authorized service centers. The ability to install firmware updates by the owner at home would be ideal. Taking this thing to my service center is a 300 mile (one way) trip. Then of course there is the several weeks wait to get it done. I might as well buy a second receiver than go through all this hassle. Also, not that many PC's / Laptops have an RS 232 or serial port anymore. They have USB. The firmware update installation method should take this into consideration. Some 232 to USB cables do not work well with some manufactures firmware installation.
Bit Rate Display
Most other receivers will show the audio source bit rate on the display. Unless I've missed something, I can't get this to display anywhere. Can this be added?