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Old 12th May 2013, 07:12 PM   #1131
jcga is offline jcga  France
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Quote:
Originally Posted by UrSv View Post
That is the same case I'm using.
I noticed that. I plan on the full aluminium version with the 10 mm front plate
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Old 12th May 2013, 10:57 PM   #1132
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Send a message via MSN to Flemming J P
Quote:
Originally Posted by chaparK View Post
Do you mean you have the channels L-R inverted?
No right channel is silent.
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Old 12th May 2013, 11:13 PM   #1133
JLOP is offline JLOP  France
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Default Najda Case

10 of us in France are working on that design for the front plate, here with the leds for WaveIO USB I2S Board (optionnal). We found more convenient to have USB to PC on front plate. Will have a MEC navigator.

Case should be Hifi2000 Slim 19" 2U 280 mm, with plenty of room for expansion board including headphone, 3 DACs in the future (tbd) and possibly ZEN-CEN-SEN IV or equivalent.

BTW Nick, you should publish back plate design with expansion board and maybe a summary with expansion boards/ports 1 and 0 ?

Jean-Louis
Attached Files
File Type: pdf Najda schéma JLP.pdf (99.5 KB, 126 views)
File Type: pdf Face AV - v6.pdf (117.1 KB, 100 views)
File Type: pdf Face AR - v2.pdf (99.3 KB, 91 views)
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Old 13th May 2013, 09:45 PM   #1134
SAC is offline SAC  United Kingdom
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Just to push the multichannel input request, a software modification as I recall, this thread nicely captures what I hope the Najda will accomplish;
ORION/PLUTO/LX521 Users Group • View topic - The DSP Challenge.

Specifically;
"One solution for surround sound (or multichannel audiophile sound from file or CD/DVD/Blu-ray) is to use multichannel from a computer via USB. On the Mac the VLC player will play multi-channel from a DVD.
The USB channels can be converted to SPDIF, TOSLINK or I2S.

One full surround potential USB solution including analog volume control, only two PCBs:

1. The $125 ten channel USBstreamer (24bit/192kHz) converts the USB channels to I2S (8 channels) or Toslink (one channel pair): http://www.minidsp.com/products/usb-aud ... sbstreamer

2. The 245 Euros ten channel najda DSP/DAC/VolumeControl (24bit/192kHz) accepts 1coax+1 toslink SPDIF, up to 6 I2S inputs, 1 stereo analog input and has 8 analog outputs with analog volume control (or for use with external DACs 5 SPDIF channel pairs, or 6 I2S channels). It needs additional components (LCD, less, push-buttons, IR sensor, relay).
"

With six I2S inputs (expansion port 0), I expect that means the Najda can handle six channels, therefore 5.1 surround sound is possible. But that is incorrect is it not? Manual says Port 1 is "stereo input only for now", the six channels on port 0 being output only.
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Old 13th May 2013, 09:49 PM   #1135
JLOP is offline JLOP  France
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Hi Sac
Can you check the link please, I cannot have it work
BR
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Old 13th May 2013, 10:08 PM   #1136
SAC is offline SAC  United Kingdom
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It works for me - Guyv post dated 26April

Page one is here if this helps;
ORION/PLUTO/LX521 Users Group • View topic - The DSP Challenge.
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Old 13th May 2013, 10:35 PM   #1137
JLOP is offline JLOP  France
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Sorry was not clear, meant second Link
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Old 13th May 2013, 11:01 PM   #1138
SAC is offline SAC  United Kingdom
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USBStreamer | miniDSP
"8 ch I2S in&out signals on 2mm header"
$125 I believe
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Old 14th May 2013, 03:56 AM   #1139
chaparK is offline chaparK  Luxembourg
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I've seen very nice things here lately, thanks all, Urban, Jean-Claude, Jean-Louis.
Special mention to Urban for his very nice PCBs. Ehm, would you have a small (big?) batch manufactured? I understood Jean-Claude would like one set, me too (I think I have a hundred of those switches in my drawer, 12x12 mm right? ) and maybe some others?

Quote:
Originally Posted by JLOP View Post
BTW Nick, you should publish back plate design with expansion board and maybe a summary with expansion boards/ports 1 and 0 ?
Hi Jean-Louis, it's probably not a good idea to run wires from expansion ports to the rear panel. Indeed, I2S signals are not meant to travel 'long' distances. Keep the connections as short as you can (i.e. really short).

Quote:
Originally Posted by SAC View Post
Just to push the multichannel input request, a software modification as I recall, this thread nicely captures what I hope the Najda will accomplish;
ORION/PLUTO/LX521 Users Group • View topic - The DSP Challenge.

Specifically;
"One solution for surround sound (or multichannel audiophile sound from file or CD/DVD/Blu-ray) is to use multichannel from a computer via USB. On the Mac the VLC player will play multi-channel from a DVD.
The USB channels can be converted to SPDIF, TOSLINK or I2S.

One full surround potential USB solution including analog volume control, only two PCBs:

1. The $125 ten channel USBstreamer (24bit/192kHz) converts the USB channels to I2S (8 channels) or Toslink (one channel pair): http://www.minidsp.com/products/usb-aud ... sbstreamer

2. The 245 Euros ten channel najda DSP/DAC/VolumeControl (24bit/192kHz) accepts 1coax+1 toslink SPDIF, up to 6 I2S inputs, 1 stereo analog input and has 8 analog outputs with analog volume control (or for use with external DACs 5 SPDIF channel pairs, or 6 I2S channels). It needs additional components (LCD, less, push-buttons, IR sensor, relay).
"

With six I2S inputs (expansion port 0), I expect that means the Najda can handle six channels, therefore 5.1 surround sound is possible. But that is incorrect is it not? Manual says Port 1 is "stereo input only for now", the six channels on port 0 being output only.
So there are 6 channels on Expansion port 0 and 12 (!) channels on expansion port 1. They can all act as inputs or outputs (with some limitations), however some firmware and software support is required in order to achieve a certain goal.

Najda is still pretty young and I had to make decisions on what to do with these ports when I released the product. The obvious things I could imagine people would like to do were connecting a USB to I2S device and possibly DACs. We can reconfigure these ports differently, but I would need some input on what you guys are trying to achieve.

I'm getting many requests on making of Najda a multi-channel processing board. However, it's was designed as a stereo application board so expanding it to multi-channel raises several issues.

One is: what would you do with analogue and SPDIF ins, that are by nature stereo?

Second is: how many internal processing channels would you need? If you want a 5.0 setup, all 3-way, that's 15 processing channels. Najda currently has 10 only.

Lastly, how would you like to output these channels? Some channels are available as analogue, some as SPDIF and there is provision for more channels via I2S. But I don't think you'd like to run a system that takes a combination of all the above, that would be a mess. What I can think of is an expansion board with 3 more SPDIF outs (6 channels) so you get 16 outputs in total. Another option would be 6 more analogue outs for a total of 14 analogue outs, but this might not be enough?

Quote:
Originally Posted by Flemming J P View Post
No right channel is silent.
So the left channel is playing on the left speaker, and the right speaker is silent, is that correct? What do the input level meters show?

Other news is that I'm currently overseas, so sorry for not showing up so often on this forum.

I'm in contact with Lucian (WaveIO), he's going to send me one of his boards and I'm going to send him one of mines, so rest reassured that we'll have the combo Najda/WaveIO work like a swiss clock.

Shaun is going to beta-test the custom biquad feature of the new release. Xav wrote an input routine which is happy with any of the files that we discussed some time ago (so it should be compatible with REW and spreadheets). We'll talk about this again soon.
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Old 14th May 2013, 05:58 AM   #1140
UrSv is offline UrSv  Sweden
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Quote:
Originally Posted by chaparK View Post
Ehm, would you have a small (big?) batch manufactured? I understood Jean-Claude would like one set, me too (I think I have a hundred of those switches in my drawer, 12x12 mm right? ) and maybe some others?
I had a small batch of each PCB made. You have a PM. And those are 12x12 mm indeed.
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