maartentje said:
Yes but see here http://www.diyaudio.com/forums/showthread.php?s=&threadid=61278&highlight=
I have also a CS8414 and 2 PCM56 waiting here to be used, so when you succesfully finisch the job i'll be very interested in your results. But first i want to finish my own digital project with 1541's😉
Hello, I would buy 6 sets if you goin to sell these. Please write details below , or send msg, my email is: readswift ~at~ gmail . com
thanks
thanks
Hi Hachiman
Thanks for your interest. I will email you later. It's probably too early to talk about selling now.
I will post some details of the design tonight. I am still reviewing design of the digital section. The digital section combines various design ideas from many sources.
Cheers
Thanks for your interest. I will email you later. It's probably too early to talk about selling now.
I will post some details of the design tonight. I am still reviewing design of the digital section. The digital section combines various design ideas from many sources.
Cheers
very good. I have 3 pulse transformers from an old AES/EBU interface. Goin to look for more. Can we use AES input and CS8416 too?
I am working with the prototype and having a strange problem.
I use a half of 74hc74 to reclock FSYNC. Clock frequency is 2.8224mhz. Left chanel work flawlessly. Then I use Q_bar output from this 74hc74 for right chanel LE. There is some repeated static noise on the right chanel. Music on the righ chanel is still very clear. I can't understand this. I know that Q_bar may be delayed slightly compared to Q but it shouldn't be that much to cause a problem.
I post the schematic below. Hopefully someone can help me.
Do I need a faster logic chip? The one I use is SN74HC74 branded TI
I use a half of 74hc74 to reclock FSYNC. Clock frequency is 2.8224mhz. Left chanel work flawlessly. Then I use Q_bar output from this 74hc74 for right chanel LE. There is some repeated static noise on the right chanel. Music on the righ chanel is still very clear. I can't understand this. I know that Q_bar may be delayed slightly compared to Q but it shouldn't be that much to cause a problem.
I post the schematic below. Hopefully someone can help me.
Do I need a faster logic chip? The one I use is SN74HC74 branded TI
Hi Quantran,
Did you use socket ?
that might cause it, I had exactly the same problem with PCM63 before
because of socket and dirty PCB.
regards,
Hartono
Did you use socket ?
that might cause it, I had exactly the same problem with PCM63 before
because of socket and dirty PCB.
regards,
Hartono
Hi Hartono
Thanks for your response.
Yes, I use sockets for both pcm63 and 74hc74. There is also a 5 wire connector (very short) from 74hc74 to PCM63.
I will try to solder the 74hc74 to the PCB.
Thanks for your response.
Yes, I use sockets for both pcm63 and 74hc74. There is also a 5 wire connector (very short) from 74hc74 to PCM63.
I will try to solder the 74hc74 to the PCB.
I have soldered the 74hc74 directly to the PCB. The result is the same i.e. still got noise. Aslo I have tried to feed the right channel PCM63 with LE of for left channel; the pcm63 of right channel process this signal perfectly. Definitely there is something wrong with the LE for right channel.
LE for left channel if Q from 74hc74 and LE for right channel is Q_bar from the same chip.
Perhaps I will try to reclock Fsync with higher clock rate e.g. 11.2896mhz.
LE for left channel if Q from 74hc74 and LE for right channel is Q_bar from the same chip.
Perhaps I will try to reclock Fsync with higher clock rate e.g. 11.2896mhz.
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