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Old 9th November 2010, 06:32 PM   #881
LeonvB is offline LeonvB  Netherlands
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Must ... learn the hard way, I think
If I may requote Russ: "One hint: SOURCE". The code you've written won't work in dual mono mode. You're only controlling the left DAC. The right one has a different address. See:
#define LEFT_ADDRESS 0x90
#define RIGHT_ADDRESS 0x92
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Old 9th November 2010, 06:41 PM   #882
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Originally Posted by glt View Post
Thanks, Russ.



Wow!. I always trust the datasheet. Must wait to learn the hard way, I think :-)
I am not sure who said anything about trust in the data-sheet.

My advice was to check that the register settings are always what you expect them to be, after all it is your controller that could be changing them. By polling the registers from time to time you can know that all is well and also that some error in transmission or code did not occur. Think of it as a checksum.

Also by checking that they have not returned to their defaults you can see if you had an inadvertent reset. This can happen for a number of good reasons.

Hard way if you must. I prefer preparation.
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Last edited by Russ White; 9th November 2010 at 07:13 PM.
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Old 9th November 2010, 07:15 PM   #883
glt is offline glt  United States
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Originally Posted by LeonvB View Post
If I may requote Russ: "One hint: SOURCE". The code you've written won't work in dual mono mode. You're only controlling the left DAC. The right one has a different address. See:
#define LEFT_ADDRESS 0x90
#define RIGHT_ADDRESS 0x92
Agree. I only have one DAC to control. But for dual mono, all register programming would have to change as well
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Old 9th November 2010, 07:17 PM   #884
glt is offline glt  United States
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Originally Posted by Russ White View Post
I am not sure who said anything about trust in the data-sheet.

My advice was to check that the register settings are always what you expect them to be, after all it is your controller that could be changing them. By polling the registers from time to time you can know that all is well and also that some error in transmission or code did not occur. Think of it as a checksum.

Also by checking that they have not returned to their defaults you can see if you had an inadvertent reset. This can happen for a number of good reasons.

Hard way if you must. I prefer preparation.
Good advice. Thanks!.
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Old 10th November 2010, 03:14 PM   #885
WDYSUN is offline WDYSUN  Italy
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Dear all,

there is any improvement placing a The Metronome ASRC Module between SPDIF and Buffalo?

best
Pietro
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Old 10th November 2010, 03:25 PM   #886
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Originally Posted by WDYSUN View Post
Dear all,

there is any improvement placing a The Metronome ASRC Module between SPDIF and Buffalo?

best
Pietro
None.

The only good reason to use a metronome with the Buf II would be if you needed to convert 48fs I2S to 64fs.
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Old 11th November 2010, 02:25 PM   #887
tjencks is offline tjencks  United States
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Hi Russ,

I've recently purchased a Buffalo II DAC off of audiogon not realizing you would be changing the XO chip. I guess I really did realize it but somehow it didn't register. Anyway I too man wanted to run dual mono mode. Is there anyway I could send in my Buffalo II and get the XO replaced with the new one for a fee?

In addition would there perhaps be any benefit in replacing the current clock with something like a Dexa Neutron Star? Is it even possible to use an external clock with your board?

Best Regards,
Theo
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Old 11th November 2010, 02:34 PM   #888
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Originally Posted by tjencks View Post
I've recently purchased a Buffalo II DAC off of audiogon not realizing you would be changing the XO chip. I guess I really did realize it but somehow it didn't register. Anyway I too man wanted to run dual mono mode. Is there anyway I could send in my Buffalo II and get the XO replaced with the new one for a fee?
Already answered: Buffalo II
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Old 11th November 2010, 03:23 PM   #889
tjencks is offline tjencks  United States
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Thanks Brian,

So I guess that is a no. What about using an external clock...would there be an advantage or a why to use an external clock?

Best Regards,
Theo
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Old 11th November 2010, 07:28 PM   #890
jgazal is offline jgazal  Brazil
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@Theo

I am not an expert, but I believe special care was taken to keep clock and power regulation very near to the pertinent circuits.

Although better external clock references might be available (not so sure if better power regulation), it seems crucial to keep the signal away from interferences.

Keeping paths/rails as short as possible seem to play a more significant role than just the clock deviation inherited from its reference source (as long as you have a good enough crystal, which is the case with Buffalo II and even if your external reference is the most stable reference, like an atomic clock...).

Ok, I might be over exaggerating with atomic clocks.

@ twisted pear

Is that right?

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