fdg
Member of the Trade: Lake People
- Joined
- Oct 29, 2009
- Posts
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There are still some questions open.
@ Zkadoush
We thought a bit about this 3.5 dB headroom from Benchmark ...
Well, it is theroretically possible that because of the interpolation processes an overshoot may occur between two full-scale samples.
With 44.1 kHz sample rate this overshoot is as long as 23 microseconds ... with 96 kHz sample rate it is about 12 micro secondes and so on.
When its is longer (3 samples or more) there is no overshoot because it is integrated.
If this "long term overshoot" is really a problem for somebody we recommend the volume of DAC V800 / V850 to be turned to the 4 o´clock position which equals to about 2-3 dB attenuation = digital headroom as the volume is reduced before any interpolation respectively D/A conversion.
The more you attenuate the more digital headroom you will win - at the expense of reduced dynamic range.
Just another nice aspect from the digital volume control we never thought about before
@ hmouse
The volume control is virtually bypassed at full CW position of the volume knob.
We feel no need to bypass the volume control software- or hardware based.
@gogogasgas
All USB input circuitry inside our D/A converters and headphone amps are situated on add-on PCBs which can easily be swapped and replaced by up-to-date models.
So it is possible to replace the 96 kHz USB input from "Version 1" DAC V800 by the 192 kHz USB PCBs (currently the Tenor chip-set).
For DAC V850 we prepare a 192 kHz USB circuitry based on the X-Mos chip-set.
This circuitry will also fit into all existing DAC V800.
By the way, currently the 192 kHz USB Tenor chip-set works with ALL Linux and Mac OS.
Also we found no issues with Windows 8.1 when all updates have been made.
So it is also working with ALL Windows OS.
@ Zkadoush
We thought a bit about this 3.5 dB headroom from Benchmark ...
Well, it is theroretically possible that because of the interpolation processes an overshoot may occur between two full-scale samples.
With 44.1 kHz sample rate this overshoot is as long as 23 microseconds ... with 96 kHz sample rate it is about 12 micro secondes and so on.
When its is longer (3 samples or more) there is no overshoot because it is integrated.
If this "long term overshoot" is really a problem for somebody we recommend the volume of DAC V800 / V850 to be turned to the 4 o´clock position which equals to about 2-3 dB attenuation = digital headroom as the volume is reduced before any interpolation respectively D/A conversion.
The more you attenuate the more digital headroom you will win - at the expense of reduced dynamic range.
Just another nice aspect from the digital volume control we never thought about before
@ hmouse
The volume control is virtually bypassed at full CW position of the volume knob.
We feel no need to bypass the volume control software- or hardware based.
@gogogasgas
All USB input circuitry inside our D/A converters and headphone amps are situated on add-on PCBs which can easily be swapped and replaced by up-to-date models.
So it is possible to replace the 96 kHz USB input from "Version 1" DAC V800 by the 192 kHz USB PCBs (currently the Tenor chip-set).
For DAC V850 we prepare a 192 kHz USB circuitry based on the X-Mos chip-set.
This circuitry will also fit into all existing DAC V800.
By the way, currently the 192 kHz USB Tenor chip-set works with ALL Linux and Mac OS.
Also we found no issues with Windows 8.1 when all updates have been made.
So it is also working with ALL Windows OS.