1 Feb
1999
1 Feb
'99
9:28 a.m.
Dwight Elvey <elvey(a)hal.com> replied to my post about building a true
"tube"
CD player:
Building analog filters of the quality needed to do
CD's
is going to be some trick. Even many early designs used
switched capacitor filters to get the needed responses.
Tubes as digital multipliers would require massive
amounts of parallelism to keep up.
No problem. The tube CD player simply has an AES/EBU (or S/P-DIF) coaxial
digital output. If you want a tube D/A to go with it, that's a separate
product.
The tube D/A would likely not use oversampling, but rather an 8-pole
analog filter.
If people want a tube oversampling D/A, that can be a more advanced, larger,
and more expensive model.