Thx !
Is it ok to skip the external USB DAC if I plan to buy the Schiit Bifrost later ?
Yes. But using the headphone jack on your laptop to feed the Lyr is far from optimal. It will have a lot of background noise as this is double amping of a noisy signal. If your computer has 2.0 volt line out jack, that would be better.
/edit
Just to be sure, if I understand it correctly.
When I will have both the AMP and the DAC :
I connect PC to DAC with :
http://www.amazon.fr/gp/product/B000I2JVV4/ref=oh_details_o01_s00_i00
Incorrect. You want this (or similar product):
http://www.amazon.com/Belkin-Hi-Speed-USB-Cable-Feet/dp/B00004Z5M1/ref=sr_1_1?ie=UTF8&qid=1345235207&sr=8-1&keywords=usb+cable
And the DAC to the AMP with :
http://www.amazon.fr/gp/product/B000O77U52/ref=oh_details_o00_s00_i00
Correct.
Right ?^^