Hi all
I never build something for digital, so I don't know much about it.
I only read some topics here about dacs, and if I have correctly understood, a basical dac needs:
an optical reciever, a decoder, a dac, and a I/V stage
but I think this is for spdif, how is it for I2S (I mean something like a cdpro2), and I heard that I2S is the best way to go.
Can you also tell me wich chips are good?
thanks a lot
Alex
I never build something for digital, so I don't know much about it.
I only read some topics here about dacs, and if I have correctly understood, a basical dac needs:
an optical reciever, a decoder, a dac, and a I/V stage
but I think this is for spdif, how is it for I2S (I mean something like a cdpro2), and I heard that I2S is the best way to go.
Can you also tell me wich chips are good?
thanks a lot
Alex
Philips chips accept I2S directly. All you need is a DAC chip and output stage. Here are some links:
http://home.student.utwente.nl/f.s.bouwman/audio/nonoz.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=5798&highlight=non+oversampling+dac
If you want to go with oversampling DF1704 accepts I2S directly as well. In all those cases you simply are not using the receiver.
http://home.student.utwente.nl/f.s.bouwman/audio/nonoz.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=5798&highlight=non+oversampling+dac
If you want to go with oversampling DF1704 accepts I2S directly as well. In all those cases you simply are not using the receiver.
So, with no oversampling-> I2S directly to a PCM1704 (that's an exemple)Peter Daniel said:Philips chips accept I2S directly. All you need is a DAC chip and output stage. Here are some links:
http://home.student.utwente.nl/f.s.bouwman/audio/nonoz.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=5798&highlight=non+oversampling+dac
If you want to go with oversampling DF1704 accepts I2S directly as well. In all those cases you simply are not using the receiver.
, then to an I/V
with oversampling-> I2S-> DS1704->PCM1704->I/V
No brickwall filter or something like this? (how does such a filter work?)
thanks Peter
Bricolo said:
So, with no oversampling-> I2S directly to a PCM1704 (that's an exemple)
, then to an I/V
with oversampling-> I2S-> DS1704->PCM1704->I/V
No brickwall filter or something like this? (how does such a filter work?)
thanks Peter
PCM1704 doesn't accept I2S format. You have to either use DF1704 (oversampling) or a sort of logic to make it compatible (non-oversampling).
I am not expert in that regard, but it's my understanding that I2S connection is limited to a certain safe length only, within a player itself. If the cable is longer you might need special sending and receiving circuits, like featured on Sonic Frontiers DAC, and that is more complex and expensive than SPDIF.
sorry of topic but...
Peter do you have any PCB extra of the DAC to sell ???
It has balanced outputs...right ?!?
Thanks
Josip
I'm using digital out from a player and that goes to outboard DAC with CS8420 receiver, DF1704 and 4 x PCM1704K
Peter do you have any PCB extra of the DAC to sell ???
It has balanced outputs...right ?!?
Thanks
Josip
a dac with i2s input is probably the easiest to build. tried it here.
http://diyparadise.com/rm20dac.html
DonJuan
http://diyparadise.com/rm20dac.html
DonJuan
joke said:sorry of topic but...
Peter do you have any PCB extra of the DAC to sell ???
It has balanced outputs...right ?!?
Thanks
Josip
It has only single ended out. I bought the board from David Broadhurst. I've heard that he was hard to get in contact recantly.
Peter Daniel said:
It has only single ended out. I bought the board from David Broadhurst. I've heard that he was hard to get in contact recantly.
so you use 2 paralleled PCM1704 per channel?
why did you choose parallelling and not differential outputs?
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