On 30/04/2019 21:03, Neil Zampella wrote:
FWIW .. Mike recommended a few years ago at least that you change the
properties from showing a PERCENTAGE to a dB level. I have mine set to
0 dB on the properties, and have not see the issues others are seeing
with the 64 bit version.
I am using an external USB soundcard with the system (Sound Blaster
xFi) which may be the reason I'm not seeing the issues, but I'm
thinking its more the property setting.
Neil, KN3iLZ
Hi Neil,
the issue is universal for all sound cards, including virtual devices
like loopback services. For some devices 100% level is 0dB, i.e. they
have no gain ahead of the ADC (or no ADC if they are a virtual device)
apart from the mic. boost stage which is not affected by this issue.
So for those using digital audio loopback devices and sound cards with
no front end gain adjustment, there is no real problem assuming 0dB is
compatible with the audio level being sampled. The real issue is where a
sound card has gain ahead of the ADC because we cannot detect that and
it will be set to maximum unconditionally on restart.
The Qt fix that is in the pipeline will revert to not changing the
existing gain settings when an audio input stream is opened.
73
Bill
G4WJS.
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