Digital volume control, WADIA style


Some of the highest ranked CD players and digitall processors let you control playback volume level in digital domain. This feature lets you drive the power amp directly, without the preamplfier connected in the audio chain.
One pair of interconnect cables becomes obsolate as well, which is good - we shurly can all agree here.
What you gain overall is a much shorter and simpler signal path. Good achivment, indeed.

But all this comes at a cost. Do we loose anything?

Yes, we do, and it is due to little recognized manipulations conducted upon the digital data stream. We are begining to play with the digital bits representing our musical signal now. Much like genetics, isn't it?
To what effect? Well, this is the question of this tread.

Some well respected manufacturers, Wadia and dCS to name two most noble of them, encourage their customers to take this digital manipulation road as being clearly superior and less audiable than even the best preamplification (=analog manipulation, let me call it by it's name).

Some others, Theta and Mark Levinson comes to my mind at the time, steer away from digital manipulation.
For those who really need some means to control the volume from within their processors or players they incorporate analog volume control circuitry in some models.

What is your personal expirience?

Is digital volume control much audiable?
Is it better than top class preamplfication?
In which case artifacts introduced to the music are easier to detect and more irritate you?
mrgigi
mrgigi: my experience comes from the direct connection of accuphase dp-75 and dp-75v cdp’s. both of these units have high-quality digital attenuators based on the designs of the accuphase all-digital preamps, the dc-300 (which uses the same dac as the dp-75) and the dc-330 (which employs the dac in the dp-75v). both of the one-box cdp's from accuphase sound better in my experience run directly than through a preamp, even one of accuphase's analog models (e.g., the c-290v). there is NO degradation of sound with these digital attenuators; they do NOT "drop bits" or otherwise manipulate the d>a processing. not all cdp's with volume controls can match the accuphases' performance. some do, indeed, drop bits and thus degrade their sonic output. -cfb
I am using a Wadia 860x directly into my Krell fpb300 via Kimber 1111 balanced. I would have it no other way. when i first hooked up the wadia in my system I was using a krell KRC 3 pre and kimber kctg. from the Wadia to the Pre. I listened to it for a few days before i went direct to the amp with the kctg's and was not expecting the improvement that I got.

I never went back and I am very pleased with the results. I have read quite a few articles saying that you should use a pre and that the bits are dropped if the volume control is below 70. I am sorry but in my case i donot believe any of it. what my ears hear is an improvement without the extra circitry. If you have aneed for additional components ie. tuners tape decks etc. than you do need a pre. If you want the best sound from your primary source go straight in and enjoy the music.
The nice thing about the Wadia's digital volume control is that you can increase the player's base level output internally so that you never have to go below 70 on the control and lose any bits.