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85.19.92.6
Hi and sorry but i am really curious and i have to ask.
Would it be possible, with schematic available, to add a spdif input to a cd player ?
I asked this in the DIY forum, hoping that there the people were more let's say "creative".
Difficult ? impossible ? easy ?
The reason of the question that sometimes very well sounding old cd players show up with broken mechanisms at very nice price.
Of course very very few provide digital inputs. This is a huge pity i think.
I would be extremely thankful to get one of these answers:
1) technically impossible
2) difficult
3) easy.
Thanks a lot for any answer.
Kind regards,
bg
Follow Ups:
Hi,
> Would it be possible, with schematic available, to add a spdif
> input to a cd player ?
In principle - yes.
You need to understand the data-format the transport produces (usually 16-Bit in either I2S or EIAJ) and then get a "UNIVERSAL" SPDIF board (there are some on e-bay using WM8804/8805 that are not completely terrible) and then remove the connection from the drive and feed clock and data from the SPDIF board. You may need to re-arrange the mute drive as well.
If you understand how the CD-Player well enough to get it all correct the actual surgery is usually not that huge, other than finding a way to install the SPDIF Board.
All that said, I think you can probably find a Kit DAC with your DAC Chip of choice for not a lot of money, so this may be a better choice.
Ciao T
At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to untolerable pain. Really, what more could we need?
Hi Mr. Thorsten and thank you sincerely for the always kind and precious advice.
When i see a good and old cd player with the broken mechanism but intact electronics i think immediately "what a waste".
Other interesting sources are DAT. Also them are sold for almost nothing with broken transports.
Even if the very good one are not cheap at all.
Maybe in some the da section is decent sounding.
I read good opinions about the better Studer, Sony and Tascam.
And some have also balanced digital inputs.
Thanks again.
Kind regards,
bg
Hard to answer definitively but if you have the schematic, access to the spec sheets for the relevant chips (OSF, DAC)and can manage the implementation of an S/PDIF input stage, it is possible. You will not be able to do this with an off-the-shelf kit nor will you have a how-to-do-it guide (unless you can find one I don't know about).
Frankly, with the explosion of the stand-alone DAC market, I don't think it is worth the bother.
Hi and thanks a lot for the very kind and helpful reply
Honestly i was thinking indeed to what you mention " You will not be able to do this with an off-the-shelf kit ".
Project closed before start.
Thanks again.
Kind regards,
bg
you could remove the analog section of a CD player that you like and insert it into a DAC (which has the digital input thing already worked out).
Just an "out-the-box" thought.
Hi and thanks for the reply.I think that the analog sections are not that critical.
Even some based on op-amps can sound extremely good.
It is the digital part that is critical.
For instance take any solid state chain, from preamp to speakers, and put in front of it a good turntable.
The sound will be from at least quite good to excellent.
I am not saying that a very good analog output stage does not improve sound. It is like the icing on the cake.
But the cake is the good digital part.
I would be satisfy enough to get a piece of cake ... i can do without the icing.
And i am against tubes in general.The digital is a very difficult beast. And all these discussions still going on after almost 30 years since its birth show that is not fully understood.
The analogists talk about records, music.
The digitalists talk always about equipment, that is the real nightmare.However i am extremely curious to see the new dac from Schiit Audio that promises to give a completely new performance with cds.
I am very curious. It could be a real tech advancement.
The medium then, the optical cd, is shit (with just one i).
It is just not possible that when treated with a demag pistol or some spray it sounds differently, like it does.
Or that only hyper expensive transports can read it efficiently.
This tells me of a wrong medium by design.
So i am trying to stay away from cds as much as possible.
Thanks again.
Kind regards,
bg
Edits: 04/12/15 04/12/15 04/12/15 04/12/15 04/12/15
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