vacuum tube DAC and connection

[peterspaul]

I have the following vacuum tube DAC http://www.curcioaudio.com/cddes_3.htm
The CD12V DAC will not accept any other digital input other than 44.1K SP/DIF.
It can take a SP/DIF (44.1K) digital input and provide an analog output. It requires a BNC connector as this provides the proper 75 ohm impedance, as opposed to an RCA however you may need an adaptor to mate with CD player/transport.

Here is my integration problem I need help in solving.
I have many music CD’s.
I would like to expand music collection with on line music selections.
Pull some music from youtube.
With all of the CD’s I have, I would like to rip songs I like to a “something”, basically I am condensing all the CD’s onto or into a “something”. Any suggestions??? What is the "something" i am looking for and the procedure? thnx