What is purpose of a cd transport?

Yeah Rcprince 4 boxes !!!
In the Blue Circle product I mentioned (BC501-OB), the separate power supply while in one box is actually two supplies. There are two umbilical cords between the power supply and the DAC, one the digital supply, the other analog.

There are two completely separate parts of digital playback; the reading of the source material and the conversion of that digital data into analog sound. To perfect them both is two separate tasks. Having them together in one box only makes perfection harder to achieve.

If you an expert digital design engineer, what do you know about making a transport? There are a lot of companies that only make the DAC. If you limit yourself to one box players, you are missing a huge part of the market. You are also missing most of the higher end of the market.

Look at turntables. What if the cartridge and phono stage was built perminently onto the turntable? If you wanted to change something you would have to buy a whole new turntable. I don't know any audio person who would consider that an improvement.

That is actually one thing that turns me off to the lower end of the audiophile turntable market. They are all selling plug and play solutions. You have to pay for the cartridge they picked for the turntable. Back in the pre-digital days in the 70s and 80's the cartridge was mostly a separate purchase, even if you were just buying the entry Dual turntable.

Blue Circle just came out with a two box version of their DAC. The very large power supply is in a separate box. So with the transport you have three boxes in total. MSB has had separate power supplies for years (the P1000).

I love, I love it, Rcprince !!!!

If you listen to vinyl then you have to get the Blue Circle BC27pi phono stage, even if only for the reason it's a two box phono stage !!

Do you have separate mono-block amps ??
6 separate cables for each tri-wire speaker?

Then install dedicated AC power lines for each power cord !!

Sorry, I am getting out of control here...

Yes all CD player/transports can read the data, but the problem is timing and distortion. Imagine what happens to the sound if the speed of the data flow is off and/or it fluxuates because of vibration, irregular speed of the platter, poor cabling, and/or fluxuations from an inadequate power supply (and a little of "all of the above" at the same time).

The data correction in the DAC can only do so much, and of course the quality of the DAC affects this also.