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Old 16th March 2013, 10:50 AM   #641
paalj is offline paalj  Norway
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Got the Najda into a preliminary housing for a little testing. Had to use what I had in the parts bin. Front in MDF

Paal
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Old 16th March 2013, 05:09 PM   #642
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Yey, Got mine working too.
Powered up and behaves just as it should -
The SPDIF light is on fine with either coax or optical in / selected - In only have one or other connected at a time.
The clipping LED for bass and treble is coming on at times / pretty much always when a track gets going. Is this normal / something I can set somewhere.
Firmware update done...
Ah, turning off the bass and treble setting via the PC cured that flashing LED...

The build is very lash at this stage... I want to hear it before committing to a nice box etc.

Click the image to open in full size.

Click the image to open in full size.

The PSU is performing nicely.

Now to load the PC app and start playing some more...

Last edited by Speedysteve7; 16th March 2013 at 05:30 PM. Reason: Firmware update + bass and treble update
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Old 16th March 2013, 05:40 PM   #643
chaparK is offline chaparK  Luxembourg
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Quote:
Originally Posted by paalj View Post
Got the Najda into a preliminary housing for a little testing. Had to use what I had in the parts bin. Front in MDF
Quote:
Originally Posted by Speedysteve7 View Post
Yey, Got mine working too.
Powered up and behaves just as it should -
Nice job! Congrats for the build!

I don't see the IR receiver module. Don't you guys intend to use a remote controller?

Paal, can you give us some detail on the PSU you're using?

Quote:
The SPDIF light is on fine with either coax or optical in / selected - In only have one or other connected at a time.
So you can leave both connected at the same time, that's not a problem

Quote:
The clipping LED for bass and treble is coming on at times / pretty much always when a track gets going. Is this normal / something I can set somewhere.
You can adjust the headroom prior to the bass/treble section in the control application. Usually 3 dB is enough unless you're listening to some really hot program. Then you can compensate by adding some output level in the analogue domain.

Quote:
Firmware update done...
Ah, turning off the bass and treble setting via the PC cured that flashing LED...
Yup, if you disable Bass/Treble in the app, then this stage is bypassed and hence cannot clip.

Quote:
The PSU is performing nicely.
Did you need to dummy load the PSU?

Quote:
Now to load the PC app and start playing some more...
That's great. Just be careful when loading IIR setup files. The fix is on the way.

Last edited by chaparK; 16th March 2013 at 05:45 PM. Reason: Asking Paal about his PSU
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Old 16th March 2013, 06:00 PM   #644
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Not got round to IR yet. Sound first
I am getting nice dancing bars on the input side of things, but nothing on the output - no matter what I press. What am I missing?
I have the first column of outputs connected up to the amp (sub at this stage). Of course nothing coming out - no lights on the output stages.

Not sure if dummy load is needed or not - I left it on as doesn't hurt apart from a few watts extra on the mains...

Quote:
Originally Posted by chaparK View Post
Nice job! Congrats for the build!
I don't see the IR receiver module. Don't you guys intend to use a remote controller?
Did you need to dummy load the PSU?
That's great. Just be careful when loading IIR setup files. The fix is on the way.
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Old 16th March 2013, 06:08 PM   #645
chaparK is offline chaparK  Luxembourg
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Quote:
Originally Posted by Speedysteve7 View Post
I am getting nice dancing bars on the input side of things, but nothing on the output - no matter what I press. What am I missing?
I have the first column of outputs connected up to the amp (sub at this stage). Of course nothing coming out - no lights on the output stages.
Alright, you're running a FIR setup.

A new FIR setup is by default an open-circuit: there's no connection between inputs and outputs.

In order to create the connection:
- Create a new file in Notepad (or similar text editor)
- Type simply 1 in the file, nothing else.
- Save the file as fir1.txt for example

Then in Najda Under Control,
- On the input processing tab, select Left FIR block and load the file. The block will show 1 coef. Do the same on the right channel.
- On the ouptut processing tab, there are also FIR blocks. For each channel that you want to connect, load the above fir1.txt file.

Now you should see bars in each channel that you have activated.
You still might not have any sound: hit the space bar or click on the Unmute button.
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Old 16th March 2013, 06:16 PM   #646
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Aha - Sound

Quote:
Originally Posted by chaparK View Post
Alright, you're running a FIR setup.

A new FIR setup is by default an open-circuit: there's no connection between inputs and outputs.

In order to create the connection:
- Create a new file in Notepad (or similar text editor)
- Type simply 1 in the file, nothing else.
- Save the file as fir1.txt for example

Then in Najda Under Control,
- On the input processing tab, select Left FIR block and load the file. The block will show 1 coef. Do the same on the right channel.
- On the ouptut processing tab, there are also FIR blocks. For each channel that you want to connect, load the above fir1.txt file.

Now you should see bars in each channel that you have activated.
You still might not have any sound: hit the space bar or click on the Unmute button.
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Old 16th March 2013, 06:51 PM   #647
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So, this is through my 5 way horn system... Well it's a 4 way horn system at the moment I've left the analogue X/O's in place. It is a leap of faith to let DSP play without passives on drivers I have - but the time will come

-Plays sound on all 4 channels.
-In/out gain structures are perfect.
-Sounds pretty good straight out of the box.

OK, no tweeter on at the moment but the Vitavox S2 compression upper mid drivers go fairly high, so Raal Lazy ribbon are not doing too much, but are missed.
Hurry up with that expansion board please

When I had the Behringers, (spit), there were sonic gains to be had going DSP X/O. This helped but did not offset the lack of SQ on input and output stages. My passives blew them away no problem at all. Bear in mind I am using just a 3uF cap on the S2's and a 1uF on the ribbon tweeters, so not a lot is getting lost on the passives. The upper 3 channels are powered by EL84 SET amps BTW.

I'll have to try the analogue in next and see what that sounds like. I love my old dac and my Puresound L10 tube pre - Now possibly redundant!

Oh, and I want that remote control now
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Old 16th March 2013, 07:04 PM   #648
chaparK is offline chaparK  Luxembourg
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Quote:
Originally Posted by Speedysteve7 View Post
So, this is through my 5 way horn system... Well it's a 4 way horn system at the moment I've left the analogue X/O's in place. It is a leap of faith to let DSP play without passives on drivers I have - but the time will come
It's actually a good idea to keep the passives until i come with the fix for IIR setups. I'm working on it. In the meantime FIRs are safe.

Quote:
-Plays sound on all 4 channels.
-In/out gain structures are perfect.
-Sounds pretty good straight out of the box.
Cool, thanks

Quote:
Hurry up with that expansion board please
Alright, we'll do that. You'll need to leave some space between the board and the power supply in your final casing.
Apart from Steve, is there anyone interested in a 6-output expansion board?

Quote:
I'll have to try the analogue in next and see what that sounds like. I love my old dac and my Puresound L10 tube pre - Now possibly redundant!
How about a USB to I2S on expansion port 1?

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Oh, and I want that remote control now
Cool, let me know how it goes!
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Old 16th March 2013, 09:09 PM   #649
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Just popped the tweeter amp off the same analogue feed as the upper mid. Sounds better for it.

I can do that with the Najda doing X/O work on the other 4 channels.
Or better to do it on the tapped horn subs, as they are something like 9ms behind the other 4 channels that are all aligned physically by Hornresp measurement and so I reckon I can delay the upper 4 channels in DSP and finally get a time aligned 5 way.

I'll hold fire on the fix first though.

The dacs voice differently to my trusty dac. Not bad, just different. Much could be OP amps - future tinkering no doubt.

Now for some ADC.

Last edited by Speedysteve7; 16th March 2013 at 09:12 PM.
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Old 16th March 2013, 10:15 PM   #650
Ryssen is offline Ryssen  Sweden
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Am trying out the software.
If I want channel 5 and 6 to be mono (sub)how do I rout that?
Is there a way to mute the channels (Individualy)?
Edit:Or maybe the muting is done on the graps page?
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Last edited by Ryssen; 16th March 2013 at 10:29 PM.
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