Hi Bill,
Reasonable suggestion... though I suspect many users would have the
consternation you mention, when we alter a control setting they thought
they had control over.
As for your last question: I don't have a reference link handy, but Leif
(SM5BSZ) has shown that most "24-bit" soundcards only provide about 18
bits of real data. The remaining 6 bits or so are random noise.
Of course we want to provide the best available advice to users; but I
think people are spending far too much time worrying about what is in
most cases a non-issue. As general statement, setting the audio level
is simply not very critical.
-- Joe
On 3/3/2017 12:49 PM, Bill Somerville wrote:
> On 03/03/2017 15:38, Joe Taylor wrote:
>> 2. The slider should not affect the meter reading.
>>
> HI Joe & all,
>
> we have another enhancement possibility available to us. WSJT-X could
> set the operating system/driver fader to 0 dB as well. This may cause
> some consternation amongst users who have tweaked the levels because we
> have said the best place for the WSJT-X slider is in the middle. Those
> who have done this are probably doing more harm than if they had tweaked
> the WSJT-X slider to get to 30 dB on background noise.
>
> Another option is that we could also switch the WSJT-X level control to
> actually change the o/s / driver fader but note the value is in the
> range 0.0 to 1.0 and I assume that 1.0 is 0 dB FS so maybe only
> attenuation is available.
>
> Related to this, I have never been sure if the operating system level is
> more than just digital manipulation of the 16-bit PCM stream. For
> example it could have access to a 24-bit sample stream at a high sample
> rate on the input side (for example my laptop is capable of 192 kHz
> 24-bit audio input) and therefore has more resolution available than a
> gain control on a 16-bit sample stream would have.
>
> 73
> Bill
> G4WJS.
>
>
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