NAD M51 Direct Digital DAC Impressions
Jun 4, 2013 at 3:24 PM Post #871 of 1,623
Quote:
Hm. I'd recommend calling in. I've had nothing but stellar experience dealing with NAD directly over the phone. 


Interesting. Admittedly, I have only tired email. Will call and report back. thanks!
 
Jun 4, 2013 at 7:18 PM Post #872 of 1,623
And BTW:  The PDF for the M51 states:
 
While the M51 includes the industry standard SPDIF inputs, including AES/EBU, Optical and Coaxial. The M51 also includes the latest USB technology fully supporting 192kHz sample rates, allowing direct connection of a PC or Mac. HDMI provides an encrypted HD Audio connection in PCM’s native I2S format up to 24 bit 192kHz.
 
 
 
Jun 4, 2013 at 8:01 PM Post #874 of 1,623
Quote:
I know you can't use a regular HDMI cable with the OR5 to the PWD mkII.  Maybe the HDMI cable from PS audio will work.  Who knows?

Sucks there isn't a standard.
 
Jun 5, 2013 at 6:40 AM Post #877 of 1,623
When the NAD was in my main rig I only used HDMI out from my macmini directly to my Onkyo surround sound (more mid fi system) for watching movies, HBO GO, and other internet offerings, and listened to some music. However, when I wanted to really listen to music, I used USB to NAD and my headphone set up. For a while I tried to use the HDMI in and then out to my Onkyo (so that everything run through HDM) but when the signal got to my TV (from my Onkyo) it was flashing. Maybe if i run the HDMI out directly to my TV that issue would not have been there, but I never tired. It was probably to many chain links that degraded the signal. Sound from HDMI in my system was not better than USB. I was not sure of that for a while, but after some repeated critical comparisons, that was my verdict. I never heard it nosier though, but that could depend on lots of factors that differentiate our systems.
 
Jun 6, 2013 at 8:05 PM Post #881 of 1,623
Quote:
I can't remember the guy's username (sorry!) but he put my NAD in his system (Macbook Pro Retina and Violetric amp with LCD2s) and was listening to it for about an hour - think he wants to buy one now.

 
Quote:
Ya that was me
biggrin.gif
. Thinking about selling a watch to fund it. Only problem is that it's a lot bigger than I thought it was making it a bit tricky to fit it on my desk.

 
Too much! Read the text in both quotes and notice the usernames. Way to harmonize, fellows.
wink.gif

 
Jun 7, 2013 at 5:02 AM Post #882 of 1,623
Quote:
But Nad is saying that the format sent through hdmi of m51 is i2s.

 
 
NAD never said that.
HDMI on m51 receives the SAME spdif signal as the one that goes over it's coax.
the difference is only in the cables used.
 
Jun 7, 2013 at 8:49 AM Post #883 of 1,623
Quote:
Still waiting to hear back re firmware release notes.

 
This was posted at SNA:
 

Revision History
-------------------------------------------------------------------------------
 version   v1.39  2012-4-26  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
-Fix polarity issue, when POSTIVE is selected the signal in actually NEGATIVE.

-------------------------------------------------------------------------------
 version   v1.38  2012-4-24  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
-Fix program fleet bug when connect Mac Mini.

-------------------------------------------------------------------------------
 version   v1.37  2011-11-22  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
- Add POLARITY UP/DOWN.
- If current menu is not polarity, press POLAR to display current polarity, else switch polarity.

Bug fixes:
-------------------------------------------------------------------------------
 version   v1.36  2011-11-21  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
- Change delay from 10s to 15s, in order to avoid power up pop noise.

-------------------------------------------------------------------------------
 version   v1.35  2011-11-2  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
- When setup as ¡°fixed¡±, volume is fixed at whatever last variable volume. But setup VFD shows ¡°Fixed Vol:-20dB¡±.

-------------------------------------------------------------------------------
 version   v1.34  2011-11-2  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
- Connecting HDMI1 to T515 DolbyDigital disc, then when changing from SPDIF, USB to HDMI1 output loud noise. Disable HDMI fast switching to solve.

-------------------------------------------------------------------------------
 version   v1.33  2011-11-1  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
- Min volume change to -90dB.

Bug fixes:
-------------------------------------------------------------------------------
 version   v1.32  2011-11-1  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
- Min volume change to -70dB.
- Deault HDMI port changed.

Bug fixes:
- When setup volume to ¡°fixed¡±, VFD shows ¡°44.1k Fixed Vol¡± but volume is still adjustable.
- Still display sample rate with no HDMI input and TV connected.

-------------------------------------------------------------------------------
 version   v1.31  2011-10-31  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
- Send string to VFD every 10ms.

Bug fixes:
- pop niose occur when shut down.

-------------------------------------------------------------------------------
 version   v1.30  2011-10-28  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
- Display screen garbled after standby off.

-------------------------------------------------------------------------------
 version   v1.29  2011-10-28  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
- USB input display 192k after power on.

-------------------------------------------------------------------------------
 version   v1.28  2011-10-24  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
- Add 1s delay before standby off.
- Send string to VFD every 40ms.

Bug fixes:
- Optical input can't be saved with special input signal.

-------------------------------------------------------------------------------
 version   v1.27  2011-10-18  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
- Compatible with the old XMOS firmware.
- Mute when HDMI rx audio is not PCM.

-------------------------------------------------------------------------------
 version   v1.26  2011-09-21  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
Bug fixes:
-Did not detect shut down in start up delay which cause VFD flash.

-------------------------------------------------------------------------------
 version   v1.25  2011-09-15  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
-Add volume setup menu.
-Remote change.

Bug fixes:
-------------------------------------------------------------------------------
 version   v1.22  2011-07-18  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
-Reduce the delay of saving parameters to 1S.
-Rename key change.

Bug fixes:
-When triggle out, should go into standby mode.

-------------------------------------------------------------------------------
 version   v1.21  2011-07-12  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
-Add negative polarity  extern IR decode function.

Bug fixes:
-Remote not check custom code.

-------------------------------------------------------------------------------
 version   v1.20  2011-07-04  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
-support NAD RS323Test tool
-remove input PC_LINK

Bug fixes:
-------------------------------------------------------------------------------
 version   v1.10  2011-06-28  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------

New features:
-Add setup in UI.
-Remote key change.

Bug fixes:
-Coaxial/optical IN 48k DolbyDigital or DTS 5.1, audio is only noise. It should detect multi channel and mute output and show message on VFD invalid format.
-Pin MR init squence error cause a reset when power on.

Revision History
-------------------------------------------------------------------------------
 version   v1.00  2011-06-13  Alvin.wang
-------------------------------------------------------------------------------
----Description------------------
Release for pp.

New features:
Bug fixes:

 
Jun 9, 2013 at 7:43 AM Post #885 of 1,623
yes! Thank you. Much obliged...
 

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