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74HC logic or No logic feedingthe Interface Receiver.
74HC logic or No logic feedingthe Interface Receiver.
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Old 9th July 2011, 09:41 PM   #1
Mario_JR is offline Mario_JR  Brazil
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Join Date: Jan 2005
Location: Sao Paulo
Default 74HC logic or No logic feedingthe Interface Receiver.

Since Ive been dealing with NOS DACs Ive seen lot of people telling that the glue logic before the Receiver is useless..just feed the receiver with SPDIF and others ferociously arguing that its necessary.
Im just a learning noob with a std. gear. to hear the difference.
What do you think guys?

Thanks!
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Old 10th July 2011, 07:42 AM   #2
batteryman is offline batteryman  United Kingdom
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Join Date: Jun 2011
Location: SCOTLAND
Quote:
Originally Posted by Mario_JR View Post
Since Ive been dealing with NOS DACs Ive seen lot of people telling that the glue logic before the Receiver is useless..just feed the receiver with SPDIF and others ferociously arguing that its necessary.
Im just a learning noob with a std. gear. to hear the difference.
What do you think guys?

Thanks!
The spdif signal is not a ttl one so I can't see why or how adding logic gates between the input and the chip would work.

Do you perhaps mean that its the output that have the hc02 usually to separate the data into left and right streams for dacs that don't have I2S inputs eg AD1865?
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Old 10th July 2011, 08:18 PM   #3
Mario_JR is offline Mario_JR  Brazil
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Join Date: Jan 2005
Location: Sao Paulo
Hi batteryman.
I meant, feeding the receiver chip (DIR9001, CS8414) with the spdif signals.
Why some use logic glue before the receiver, and some connect the spdif directly to the receiver chip.


Quote:
Originally Posted by batteryman View Post
The spdif signal is not a ttl one so I can't see why or how adding logic gates between the input and the chip would work.

Do you perhaps mean that its the output that have the hc02 usually to separate the data into left and right streams for dacs that don't have I2S inputs eg AD1865?
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