I bought the basic pcb with components from http://www.roger-pilgham.nl/ now I wonder if I can run it dc coupled,if there is any chance off destroing the DAC by doing so?
And I e-mailed pilgham about the flatcable,but havent got any answer yet.do they sell the cable?
And I e-mailed pilgham about the flatcable,but havent got any answer yet.do they sell the cable?
hi,
When I connect my DCX2496 with digital output from philips CD604 it recognise signal and music plays but the volume is too high and sometimes inputs are clipping, what should I do?
When I connect my DCX2496 with digital output from philips CD604 it recognise signal and music plays but the volume is too high and sometimes inputs are clipping, what should I do?
I'm not so stupid'😉 even when inputs are -15dB and outputs are -15dB the subwoofer out is clipping and both inputs too. I'm thinking about some mixer with digital input and output, I've read that the DCX2496 has some problems with spdif:
Can I send a S/PDIF signal from a CD player to the digital XLR input on the DCX2496 / DEQ2496 ?
Yes - under most normal circumstances this will work. The two transmission standards are similar but not identical - you may find that under certain circumstances the AES/EBU input to the DCX2496 does not automatically recognise the SPDIF signal coming from the consumer device. This is due to the physical properties of the SPDIF transmission, and is not a defect in the DCX2496. The best solution to this situation is to use a universal format converter - eg our SRC2496. The DEQ2496 allows you to select the incoming format. However, if you do decide to use an adapter cable it is important to use a cable which is suitable for digital data transmission.
It works... but why it is so loud?
What do you think about digital mixer?
Can I send a S/PDIF signal from a CD player to the digital XLR input on the DCX2496 / DEQ2496 ?
Yes - under most normal circumstances this will work. The two transmission standards are similar but not identical - you may find that under certain circumstances the AES/EBU input to the DCX2496 does not automatically recognise the SPDIF signal coming from the consumer device. This is due to the physical properties of the SPDIF transmission, and is not a defect in the DCX2496. The best solution to this situation is to use a universal format converter - eg our SRC2496. The DEQ2496 allows you to select the incoming format. However, if you do decide to use an adapter cable it is important to use a cable which is suitable for digital data transmission.
It works... but why it is so loud?
What do you think about digital mixer?
uwe300 said:
What I do is use several EQs like filters to lower the gain on my woofer to -60db or so...
Hi,
what is the clipping indicator telling us when a digital input is fed into DCX?
Is it telling us that the digital signal is above the most significant bit (MSB)?
or
Is it telling us that the voltage level of the incoming digital signal is too high to allow the circuits to decode the digital information.
Since the DCX is designed to accept an AES level signal, I cannot see how an SPDIF signal could cause voltage overload.
It seems that the indicator is more likely telling us that the digital info is above MSB.
There is another old thread talking about digital clipping of signal coming off CD. Could this be a clue to what is happening?
what is the clipping indicator telling us when a digital input is fed into DCX?
Is it telling us that the digital signal is above the most significant bit (MSB)?
or
Is it telling us that the voltage level of the incoming digital signal is too high to allow the circuits to decode the digital information.
Since the DCX is designed to accept an AES level signal, I cannot see how an SPDIF signal could cause voltage overload.
It seems that the indicator is more likely telling us that the digital info is above MSB.
There is another old thread talking about digital clipping of signal coming off CD. Could this be a clue to what is happening?
Digital input clipping
The input meters on the DCX for sure indicates clipping when connected to a CD player for example via SPIF.
This does not mean that the is digital( or analog) clipping on the digital input. So when using the DCX with (digital input) dont worry about what the Input meter shows !
However the actual clipping point on the Output side is acutually slightly below 0 dB - stay at max -2 dB on the output meters and your should be fine.
Morten
The input meters on the DCX for sure indicates clipping when connected to a CD player for example via SPIF.
This does not mean that the is digital( or analog) clipping on the digital input. So when using the DCX with (digital input) dont worry about what the Input meter shows !
However the actual clipping point on the Output side is acutually slightly below 0 dB - stay at max -2 dB on the output meters and your should be fine.
Morten
Re: Digital input clipping
Well, the clipping does show *something*, doesn't it? The way I understand it, it shows that the signal is digital clipping, meaning that the contents of the S/PDIF (or AES/EBU) is clipping, not the interface voltage levels.
It means that the incoming signal sample is at digital level all-1's (max that can be handles by the 16 bits).
Jan Didden
Henckel said:
Well, the clipping does show *something*, doesn't it? The way I understand it, it shows that the signal is digital clipping, meaning that the contents of the S/PDIF (or AES/EBU) is clipping, not the interface voltage levels.
It means that the incoming signal sample is at digital level all-1's (max that can be handles by the 16 bits).
Jan Didden
Hi Janneman,
are you saying that all the CDs that are causing input clipping indicators to light up have an overload signal in the digital information? i.e. all 111111s
I thought this recording problem was relatively rare!!!!
are you saying that all the CDs that are causing input clipping indicators to light up have an overload signal in the digital information? i.e. all 111111s
I thought this recording problem was relatively rare!!!!
I need to reduce the gain on my DEQ2496 by about 8db to prevent the meter showing clipping. I connect my digital input as desribed by Thorsten Loesch and as he is no longer posting on forums, I hope he won't mind me posting his advice here!
Likewise, I followed his advice for the digital output.
Likewise, I followed his advice for the digital output.
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Hi Nuuk,
your repeat of TL's posting is very informative, but it prompts a few questions.
Q1. What is the purpose of the 220r resistor on the input adaptor?
Q2. What is the 220r connected to?
Q3. Is the output stage of the UC and DCX able to drive (supply sufficient current) the 150r//adaptor shown for the output connection?
your repeat of TL's posting is very informative, but it prompts a few questions.
Q1. What is the purpose of the 220r resistor on the input adaptor?
Q2. What is the 220r connected to?
Q3. Is the output stage of the UC and DCX able to drive (supply sufficient current) the 150r//adaptor shown for the output connection?
AndrewT said:
Hi Andy,
I don't know how rare it is or not, but it does happen. I don't know any specific numbers but I have seen several articles in the past showing CD levels clearly clipping, ie with waveforms that had whole sections with flat tops as if sheared off.
It's the same problem we had with LP and tape. To be sure that there is no clipping, the recording engineer should do a complete recording to determine the max levels of a musical piece, then do the real recording just below slipping. That doesn't happen, too expensive!
With analog, the recording engineers did what was called "gain riding", slowly adjusting the recording level depending on a musical passage. Analog clipping was more benign anyway, but with digital it is brick wall, or rather brick ceiling.
Jan Didden
Hi,
Do we have agreement that the clipping indicators in the DCX digital input are showing poor recording technique in manufacturing the CDs?
If this is the case then there is no amount of post processing that can recover the lost information.
Henckel,
can you come back and explain again?
I think you have some useful information, but I am having trouble deciphering the content. Sorry!
Do we have agreement that the clipping indicators in the DCX digital input are showing poor recording technique in manufacturing the CDs?
If this is the case then there is no amount of post processing that can recover the lost information.
Henckel,
can you come back and explain again?
I think you have some useful information, but I am having trouble deciphering the content. Sorry!
Hi Andrew,
I don't understand how all that works, just that it does for me! If everybody buys Thorsten's commercial gear, he will become very rich, retire from the business, and start posting back here! 🙄
Using digital in and digital out in that way makes the DEQ2496 'invisible' in my system and I have no problems with clipping once the gain is set correctly.
I posted that information in case it was of use to uwe300.
The 220R is connected between the signal pin of the XLR plug and the shield on the cable, ie it must be as close to the plug as practical. I don't know what it does.
From what I hear there is no problem at all driving the resistor network on the output cable.
One observation - the signal lock light on the DAC is now lit all the time (while the DEQ is powered up).
I don't understand how all that works, just that it does for me! If everybody buys Thorsten's commercial gear, he will become very rich, retire from the business, and start posting back here! 🙄
Using digital in and digital out in that way makes the DEQ2496 'invisible' in my system and I have no problems with clipping once the gain is set correctly.
I posted that information in case it was of use to uwe300.
The 220R is connected between the signal pin of the XLR plug and the shield on the cable, ie it must be as close to the plug as practical. I don't know what it does.
From what I hear there is no problem at all driving the resistor network on the output cable.
One observation - the signal lock light on the DAC is now lit all the time (while the DEQ is powered up).
Hi Nuuk,
I see the 220r is from pin to ground. Is that the other pin of the XLR?
It may be that it is there to provide loading for the unused half of the balanced signal/source when converting from unbalanced to balanced.
Can anyone confirm?
I see the 220r is from pin to ground. Is that the other pin of the XLR?
It may be that it is there to provide loading for the unused half of the balanced signal/source when converting from unbalanced to balanced.
Can anyone confirm?
I can't remember for sure but I think I put the 220R between pins 1 (ground/shield) and 2 (hot/+ve) and then bridged pins 1 and 3 (cold/-ve).
Nuuk said:
Hi Nuuk,
If you lower the digital level before the DCX with something like a DEQ or a SRC you no longer see the clip on the DCX, but of course the *signal* is still heavily distorted. It will not sound any better. A waveform with flat tops because of recording clipping will still have the same shape and strong distortion when you lower the level. The only remedy is better recordings!
Jan Didden
Hi,
yea, but it stops the clipping indicator telling me that the recording is duff.
It must sound better if I don't know it's distorted.
What about the clipping indicator on the DEQ, UC, SRC etc when a digital signal is fed in that is digitally overloaded?
or are they not fitted with overload indicators?
Repeat Q,
are we agreed that digital signal into DCX causing clipping indicators to illuminate are showing a recording fault and not a set up problem?
yea, but it stops the clipping indicator telling me that the recording is duff.
It must sound better if I don't know it's distorted.
What about the clipping indicator on the DEQ, UC, SRC etc when a digital signal is fed in that is digitally overloaded?
or are they not fitted with overload indicators?
Repeat Q,
are we agreed that digital signal into DCX causing clipping indicators to illuminate are showing a recording fault and not a set up problem?