Peter Daniel said:Adding Kwak clock can be a nice upgrade, but this should be done in anybody's own extend, unless Elso is willing to make 30pcs. at a special rate, just for forum members.
Kwak clock is external clock which is improvement over the built in oscilator.
How would an external clock be added to the drive? I did not see an external clock pin in the interface on the CDPRO2.
Anthony
BrianGT said:
The display panel is something I've been thinking about. It's so big and inconvenient, that it's really hard to implement it into a nice design of a player. I would be really interested with a better display and smaller custom board. Empty board is 13 Euro, it's a good price, but it's too bulky.
I have no clue about interfacing it though.
Rick,
Perhaps, I could find/develop a different version than Elso's. I don't think that it would be right to mass produce his design.
I would guess that a group buy would certainly reduce the costs for him. Buying any electronics parts in small quantities can cost 30-60% more than a large purchase. If you could get a committed group together and he would source the boards, perhaps, I could source the components. He may even allow me to source the boards and we could give him a "royalty".
Would be best to ask Elso.
Perhaps, I could find/develop a different version than Elso's. I don't think that it would be right to mass produce his design.
I would guess that a group buy would certainly reduce the costs for him. Buying any electronics parts in small quantities can cost 30-60% more than a large purchase. If you could get a committed group together and he would source the boards, perhaps, I could source the components. He may even allow me to source the boards and we could give him a "royalty".
Would be best to ask Elso.
Brian,
I doubt that they publish the interface specs for the unit. Probably the only way to do it would be for someone to "reverse" engineer the interface.
Peter, can you give me a clue as to what's on the board? That may give me an idea as to what the display is actually doing and how much it controls the rest of the unit. If we can determine that it uses RS232, parallel, I2C, SPI, or some other interface, that would make it much easier to reverse engineer.
Could you make a list of the components on the board?
Thanks,
Dale
I doubt that they publish the interface specs for the unit. Probably the only way to do it would be for someone to "reverse" engineer the interface.
Peter, can you give me a clue as to what's on the board? That may give me an idea as to what the display is actually doing and how much it controls the rest of the unit. If we can determine that it uses RS232, parallel, I2C, SPI, or some other interface, that would make it much easier to reverse engineer.
Could you make a list of the components on the board?
Thanks,
Dale
ooops,
I went to the site and see the board:
An Intel 80C32 microcontroller, an eprom, an IR decoder, a 8 bit register, some tactile switch interfaces, and the display.
The display is custom and has all of the pre-configured modes.
How big is the board?
What does it plug into? What kind of cable, how many pins?
Dale
I went to the site and see the board:
An Intel 80C32 microcontroller, an eprom, an IR decoder, a 8 bit register, some tactile switch interfaces, and the display.
The display is custom and has all of the pre-configured modes.
How big is the board?
What does it plug into? What kind of cable, how many pins?
Dale
Dale,
if you look at the Daisy website, there is a good deal of information on the DSA interface, which is used to control the cdpro. They have pdfs of the commands and details on how it works. It looks like asynchronous serial.
http://www.daisy-laser.com/tech2.htm#DSA specifications
They have guidelines on their page as to designing controls for their modules. It might be worth a try to make a new module for it. What do you think?
--
Brian
if you look at the Daisy website, there is a good deal of information on the DSA interface, which is used to control the cdpro. They have pdfs of the commands and details on how it works. It looks like asynchronous serial.
http://www.daisy-laser.com/tech2.htm#DSA specifications
They have guidelines on their page as to designing controls for their modules. It might be worth a try to make a new module for it. What do you think?
--
Brian
The display board is 3 x 8" and it connects to Cd-Pro with 4 wires.
100 Euro is a good price for complete board, when you compare it to LC Audio clock. But I would rather do it myself, either on PCB or p2p and save some Euros to buy more transports, especially when Elso isn't too mysterious about his design.
100 Euro is a good price for complete board, when you compare it to LC Audio clock. But I would rather do it myself, either on PCB or p2p and save some Euros to buy more transports, especially when Elso isn't too mysterious about his design.
LOTSA DIY CD Player stuff! (long, alas unverified)
Lots of good info, worth filing and going through slowly when you are in the mood re CD players. "I think buying and old clunker to pull apart and play with could be a good way to learn.
tweak it with better mechanical implementation, power supplies etc and maybe even replace DAC with eval board
best Crystal available for about $550
and maybe add new clock.
Choose one which uses a good basic play mechanism e.g. Phillips CDM12 as
used in Meridian 508/ Quad /Cambridge.
No reason not to be able to create
a player which rivals the best.
Build a CD player
http://www.geocities.com/agalavotti/cdpro.htm
cool implementation
http://www.marleylondon.com/cdpro.htm
drive supply
http://www.daisy-laser.nl/homeoptics/
comments
http://www.audiokits.com/newsletter.asp
easy eval board based DAC
http://beggingdogrecords.tripod.com/DAC.html
lots of great DIY CD info
http://www.audiodesignguide.com/cdplayer/index.html
an interesting site for DIY in terms of how to assemble and layout parts
http://www.decdun.fsnet.co.uk/project.preamp.html#top15
mechanical CD player mods
http://www.decdun.fsnet.co.uk/project.cd.html#top14
other CD mods
http://www.soundstage.com/maxdb/maxdb200006.htm
part 2
http://www.soundstage.com/maxdb/maxdb200007.htm
more mods
http://www.diyparadise.com/cdptweak.htm
DIY clocks
http://www.diyhifisupply.com/accessories/cd_xo_clock.html
whatever happened to Doug Blackburn? - nice online mag with lotsa back issues
http://www.soundstage.com/maxdb/maxdb.htm
general links page I stumbled upon
http://www.audio-nova.com/Innehall/audionova_DIY.htm
Have fun!
Lots of good info, worth filing and going through slowly when you are in the mood re CD players. "I think buying and old clunker to pull apart and play with could be a good way to learn.
tweak it with better mechanical implementation, power supplies etc and maybe even replace DAC with eval board
best Crystal available for about $550
and maybe add new clock.
Choose one which uses a good basic play mechanism e.g. Phillips CDM12 as
used in Meridian 508/ Quad /Cambridge.
No reason not to be able to create
a player which rivals the best.
Build a CD player
http://www.geocities.com/agalavotti/cdpro.htm
cool implementation
http://www.marleylondon.com/cdpro.htm
drive supply
http://www.daisy-laser.nl/homeoptics/
comments
http://www.audiokits.com/newsletter.asp
easy eval board based DAC
http://beggingdogrecords.tripod.com/DAC.html
lots of great DIY CD info
http://www.audiodesignguide.com/cdplayer/index.html
an interesting site for DIY in terms of how to assemble and layout parts
http://www.decdun.fsnet.co.uk/project.preamp.html#top15
mechanical CD player mods
http://www.decdun.fsnet.co.uk/project.cd.html#top14
other CD mods
http://www.soundstage.com/maxdb/maxdb200006.htm
part 2
http://www.soundstage.com/maxdb/maxdb200007.htm
more mods
http://www.diyparadise.com/cdptweak.htm
DIY clocks
http://www.diyhifisupply.com/accessories/cd_xo_clock.html
whatever happened to Doug Blackburn? - nice online mag with lotsa back issues
http://www.soundstage.com/maxdb/maxdb.htm
general links page I stumbled upon
http://www.audio-nova.com/Innehall/audionova_DIY.htm
Have fun!
Coulomb said:
You just need to send the clock's sync output to the sync input on the drive. Everything digital needs some sort of clock/sync input. You may need to check the pinout of the control or DAC chip to figure out where to send the sinc signal, but it shouldn't be too much of a problem
Cheers...........
12s dac
Hi,
Managed to find a 12s compatible dac designed for this transport check here (you can use alta vista babel fish to convert the language albeit not well)
http://www.armoniahifi.com/It/Dac4-it.html
Any comments? Don't know if the analogue gain stage has to be puchased seperatley, initial overview looks good though, it uses 2 1704 dac's.
Thanks
Raj
Hi,
Managed to find a 12s compatible dac designed for this transport check here (you can use alta vista babel fish to convert the language albeit not well)
http://www.armoniahifi.com/It/Dac4-it.html
Any comments? Don't know if the analogue gain stage has to be puchased seperatley, initial overview looks good though, it uses 2 1704 dac's.
Thanks
Raj
Do you have info regarding pricing on that kit?
It is oversampling DAC, I still would be tempted to use non-oversampling design here, as it simplifies construction a lot as well as might sound better. This DAC is similar to what I built once, although doesn't seem to have all the refinements. Mine is based on David Broadhurst board. I'm also using parallell PCM1704 and DF1704 filter. The output stage is discreet. When I built my non-oversampling DAC, I will compare both.
It is oversampling DAC, I still would be tempted to use non-oversampling design here, as it simplifies construction a lot as well as might sound better. This DAC is similar to what I built once, although doesn't seem to have all the refinements. Mine is based on David Broadhurst board. I'm also using parallell PCM1704 and DF1704 filter. The output stage is discreet. When I built my non-oversampling DAC, I will compare both.
Attachments
A good idea IMO, would be to make a 3 pcb dac
one for the PS, one for the dac itself, and one for the I/V
so, everyone could modify easily the dac, using self made PS or I/V (discrete, tube, opamp) on a veroboard or even a self made pcb
Peter: for the same price, what would sound best: paralleled 1704, or high quality 1704 (the ones that have better THD)
one for the PS, one for the dac itself, and one for the I/V
so, everyone could modify easily the dac, using self made PS or I/V (discrete, tube, opamp) on a veroboard or even a self made pcb
Peter: for the same price, what would sound best: paralleled 1704, or high quality 1704 (the ones that have better THD)
oversampling
Hi Peter,
Actually I've just e-mailed some questions to the designers of the dac, but I did'nt think of asking 'bout oversampling
I think the dac is around 408 euro's, but not sure if the gain stage needs to be bought/built seperatley.
This was the one grey area regarding the transport, I think for many of us.
Peter using the broadhurst dac, is there anything you can pinpoint about the sonics that you think could be improved, I have read that Broadhurst is working on a FIFO buffer, perhaps this will all but eliminate the need for the superior 12s connection?
I do know that Aksa, has a dac in the pipeline that's supposed to be pretty good looking at what Hugh's told me via e-mail etc, (he says that the I/V conversion is going to be special) but it won't be directly 12s.
I suppose the other option si to go for a nixon type minimalist design, but no-one has made a comparison using this transpoert and oversampling/ non OS yet have they?
If I find out any good info I'll post it here.
Thanks
Raj
Hi Peter,
Actually I've just e-mailed some questions to the designers of the dac, but I did'nt think of asking 'bout oversampling
I think the dac is around 408 euro's, but not sure if the gain stage needs to be bought/built seperatley.
This was the one grey area regarding the transport, I think for many of us.
Peter using the broadhurst dac, is there anything you can pinpoint about the sonics that you think could be improved, I have read that Broadhurst is working on a FIFO buffer, perhaps this will all but eliminate the need for the superior 12s connection?
I do know that Aksa, has a dac in the pipeline that's supposed to be pretty good looking at what Hugh's told me via e-mail etc, (he says that the I/V conversion is going to be special) but it won't be directly 12s.
I suppose the other option si to go for a nixon type minimalist design, but no-one has made a comparison using this transpoert and oversampling/ non OS yet have they?
If I find out any good info I'll post it here.
Thanks
Raj
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