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Old 26th January 2011, 07:05 PM   #1
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Default Cambridge Dac Magic fault?

Sometimes when Im listening a cd the lights of the Dac(the sample rate signal 44,1 Khz) go out for one second.This happens 5 or 6 times while Im listening a CD.What is weird is that I borrow a cd player from a friend and this doesnt happen with it,neither with a Yamaha cd player that I tried before.
Im using the digital coaxial input of the Dac,the USB and optical input are fine.The problem is not with the coaxial output of the cd player,because the shop gave me another and this still happens with the new.
The CD player is a Cambridge!
What might be the fault?
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Old 26th January 2011, 07:27 PM   #2
Mooly is offline Mooly  United Kingdom
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The light goes out! Does the audio drop out too ?

""The problem is not with the coaxial output of the cd player,because the shop gave me another and this still happens with the new."

You mean you have tried another identical player and that still does the same ? and yet with two other different players and its OK.

If that's what you are saying it sounds like some strange compatability issue. May be the clock frequency is slightly out of the range that the DAC can lock onto.
Are the amplitudes OK of the signal... this cropped up recently,
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Old 26th January 2011, 08:25 PM   #3
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Quote:
Originally Posted by Mooly View Post
The light goes out! Does the audio drop out too ?
Yes,for a second
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Old 26th January 2011, 08:58 PM   #4
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I have a DJ Cd player with pitch control. Whenever the pitch control is enabled, the SPDIF clock rate is simply scaled and the dacmagic is not able to cope with this.

So I also suspect the offset between the CD player clock and DAC clock is too big. Try another dacmagic if you can, to see if it does the same. If it does, the frequency reference inside the CD player is probably off.

OTOH, if the other DAC does not show the problem, the reference clock of your DAC is off. I suggest getting it fixed under warranty; an alternative is getting a new crystal, but I do not know where to get a generic one cheaply (of course, you could probably switch to TentLabs or so).

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Old 26th January 2011, 09:29 PM   #5
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well,at the present Im using the optical connection,and so far everything OK
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Old 27th January 2011, 01:23 PM   #6
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Couldnt be that the digital coaxial output of the player is a little on the low side voltage wise & this is causing it to occasionally unlock from the signal?
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Old 27th January 2011, 05:43 PM   #7
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Quote:
Originally Posted by nbaptista View Post
Couldnt be that the digital coaxial output of the player is a little on the low side voltage wise & this is causing it to occasionally unlock from the signal?
The dacmagic coax input has a lot of gain; I highly doubt that low input signal level is the problem.

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