Re: [wsjt-devel] Another observed drawback - audio input level

[Bill Somerville]

On 02/05/2019 00:05, Gary Kohtala - K7EK via wsjt-devel wrote:
We are talking about RX audio. I use a SignaLink USB, not the on board 
sound system,
and am experiencing the problem. Interestingly, when I execute another 
program called
MARS-ALE, it somehow forces the RX audio to 0.0 db. Not sure how N2CKH 
did that but perhaps

it would be a possibility in WSJT-X at some point.

Best regards,

Gary, K7EK

Radcliff, KY (EM77at)


Hi Gary,

it is possible to determine the 0 dB point by querying a whole bunch of 
MS proprietary APIs to get the extents and step size for the driver 
level control but it is a PITA. Since we use Qt (QAudioInput) to manage 
the input audio stream we only have a basic control that goes from zero 
to one with no information about how that maps to gain or attenuation - 
so we don't use that.


The fix in Qt is small and was completed quickly when I spoke to the 
developer who made the change that caused the level resetting issue. We 
will wait for the fix to flow through to a release. It is in for Qt 
5.12.4 which is due in May. Until then you always have the option to use 
the 32-bit build of WSJT-X.


73
Bill
G4WJS.



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Re: [wsjt-devel] Another observed drawback - audio input level

[Gary Kohtala - K7EK via wsjt-devel]

 Hasan,
We are talking about RX audio. I use a SignaLink USB, not the on board sound 
system,and am experiencing the problem. Interestingly, when I execute another 
program calledMARS-ALE, it somehow forces the RX audio to 0.0 db. Not sure how 
N2CKH did that but perhapsit would be a possibility in WSJT-X at some point.
Best regards,
Gary, K7EK
Radcliff, KY (EM77at)
---
On Tuesday, April 30, 2019, 5:47:04 PM EDT, Hasan al-Basri 
 wrote:  
 
 I am also using an external usb sound dongle (the $5 variety from Amazon). I 
am not seeing any of the noted audio issues with the 64 bit version.
I have set the audio once, gone back and forth, started, stopped the program, 
changed configs. I don't see it. I assumed it was because it was not the 
motherboard sound card. Now I gather from Bill that it is because it has no 
level setting.
BTW, I assume we are talking about transmit level setting, not rx?
73, N0ANHasan

On Tue, Apr 30, 2019 at 3:35 PM Bill Somerville  wrote:

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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Re: [wsjt-devel] Another observed drawback - audio input level

[Joe, LB1HI]

a quotation from sourceforge  .

Windows users will discover that WSJT-X v2.1.0 has been made available
as a 64-bit MS Windows build for 64-bit versions of Windows since Vista.
This veraion has one known defect. The audio input device level will be
reset to 100% when WSJT-X is started, when the input audio device is
changed, and when switching to a new configuration. This is a Qt
framework defect that we have reported and is being fixed in a future
release; until then users should take care to set the device audio level
back to 0dB or lower depending on requirements. Note that many sound
cards and chips have real gain ahead of the ADC, as much as 14dB, which
will be turned to the maximum due to this defect and is usually
undesirable when using WSJT-X.

Despite this annoying defect, we recommend the 64-bit version of WSJT-X
on MS Windows as it has significant advantages in decoding speed.

-- 73 from Joe, K1JT; Steve, K9AN; and Bill, G4WJS.

On 30/04/2019 14:43, Black Michael via wsjt-devel wrote:
Are you guys looking at the dB level in the audio management panel?  
Or the % level?

WSJT-X does not touch the audio so it has to be Windows doing it.

Recording audio should be at 0dB.

de Mike W9MDB




On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via wsjt-devel 
 wrote:



It also does it in Win7, audio sound recording to max on restart.
Mike/kf8my



-Original Message-
From: Joe, LB1HI 
To: wsjt-devel 
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input level

Hi,
Another observed  drawback is that after each WSJT-X restart, previously
pre-set audio (Win 10 64 bit) signal input level of the sound card
changes. It changes spontaneously. It changes to a maximum  - 100% of
the  level setting range.

73`s Joe



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Re: [wsjt-devel] Another observed drawback - audio input level

[Hasan al-Basri]

Thanks Bill, and yes it does get set to +23 dB with any change in config.
Think I'll leave the sound setting window open  :-)
73, N0AN

Hasan


On Tue, Apr 30, 2019 at 5:01 PM Bill Somerville 
wrote:

> On 30/04/2019 22:42, Hasan al-Basri wrote:
> > BTW, I assume we are talking about transmit level setting, not rx?
>
> Hi Hasan,
>
> no, this issue only affects audio input devices.
>
> 73
> Bill
> G4WJS.
>
>
>
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Re: [wsjt-devel] Another observed drawback - audio input level

[Bill Somerville]

On 30/04/2019 22:42, Hasan al-Basri wrote:

BTW, I assume we are talking about transmit level setting, not rx?


Hi Hasan,

no, this issue only affects audio input devices.

73
Bill
G4WJS.



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Re: [wsjt-devel] Another observed drawback - audio input level

[Hasan al-Basri]

I am also using an external usb sound dongle (the $5 variety from Amazon).
I am not seeing any of the noted audio issues with the 64 bit version.

I have set the audio once, gone back and forth, started, stopped the
program, changed configs. I don't see it. I assumed it was because it was
not the motherboard sound card. Now I gather from Bill that it is because
it has no level setting.

BTW, I assume we are talking about transmit level setting, not rx?

73, N0AN
Hasan


On Tue, Apr 30, 2019 at 3:35 PM Bill Somerville 
wrote:

> 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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Re: [wsjt-devel] Another observed drawback - audio input level

[Bill Somerville]

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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Re: [wsjt-devel] Another observed drawback - audio input level

[Neil Zampella]

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

On 4/30/2019 2:53 PM, Enrique Scheuer wrote:

Same problem here with the same operational conditions.

de Enrique
PY2CP

Em ter, 30 de abr de 2019 às 15:31, Paul Kube mailto:paul.k...@gmail.com>> escreveu:

Looking at this ("Microphone Properties" for the USB Audio Codec
that the IC-7300 provides and that WSJT-X uses as input):

miclevel.png

It gets set to 100% whenever WSJT-X 2.1.0-rc5 starts, and I have
to set it to 40% "by hand". WSJT-X  2.0.1 did not have this issue.

Windows 10 Pro x64 here.

73, Paul K6PO


On Tue, Apr 30, 2019 at 5:48 AM Black Michael via wsjt-devel
mailto:wsjt-devel@lists.sourceforge.net>> wrote:

Are you guys looking at the dB level in the audio management
panel?  Or the % level?
WSJT-X does not touch the audio so it has to be Windows doing it.

Recording audio should be at 0dB.

de Mike W9MDB




On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via
wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>> wrote:


It also does it in Win7, audio sound recording to max on restart.
Mike/kf8my



-Original Message-
From: Joe, LB1HI mailto:jo...@lb1hi.no>>
To: wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>>
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input
level

Hi,
Another observed  drawback is that after each WSJT-X restart,
previously
pre-set audio (Win 10 64 bit) signal input level of the sound
card
changes. It changes spontaneously. It changes to a maximum  -
100% of
the  level setting range.

73`s Joe



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Re: [wsjt-devel] Another observed drawback - audio input level

[F6BHK]

Please be considerate of others. We don't speak or understand english 
very well but are venting our ideas on this list in good faith.


Else simply delist all foreigners

73

Serge F6BHK


On 30/04/2019 21:10, Joe Taylor wrote:
Please read messages to the list before sending your own on the same 
topic!


Please read the announcement abou -rc5:

"Windows users will discover that WSJT-X v2.1.0 has been made 
available as a 64-bit MS Windows build for 64-bit versions of Windows 
since Vista. This version has one known defect. The audio input device 
level will be reset to 100% when WSJT-X is started, when the input 
audio device is changed, and when switching to a new configuration. 
This is a Qt framework defect that we have reported and is being fixed 
in a future release; until then users should take care to set the 
device audio level back to 0dB or lower depending on requirements. 
Note that many sound cards and chips have real gain ahead of the ADC, 
as much as 14dB, which will be turned to the maximum due to this 
defect and is usually undesirable when using WSJT-X.


"Despite this annoying defect, we recommend the 64-bit version of 
WSJT-X on MS Windows as it has significant advantages in decoding speed."


-- 73, Joe, K1JT


On 4/30/2019 14:53, Enrique Scheuer wrote:

Same problem here with the same operational conditions.

de Enrique
PY2CP

Em ter, 30 de abr de 2019 às 15:31, Paul Kube > escreveu:


Looking at this ("Microphone Properties" for the USB Audio Codec
that the IC-7300 provides and that WSJT-X uses as input):

miclevel.png

It gets set to 100% whenever WSJT-X 2.1.0-rc5 starts, and I have to
set it to 40% "by hand". WSJT-X  2.0.1 did not have this issue.

Windows 10 Pro x64 here.

73, Paul K6PO


On Tue, Apr 30, 2019 at 5:48 AM Black Michael via wsjt-devel
mailto:wsjt-devel@lists.sourceforge.net>> wrote:

Are you guys looking at the dB level in the audio management
panel?  Or the % level?
WSJT-X does not touch the audio so it has to be Windows doing 
it.


Recording audio should be at 0dB.

de Mike W9MDB




On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via
wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>> wrote:


It also does it in Win7, audio sound recording to max on 
restart.

Mike/kf8my



-Original Message-
From: Joe, LB1HI mailto:jo...@lb1hi.no>>
To: wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>>
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input 
level


Hi,
Another observed  drawback is that after each WSJT-X restart,
previously
pre-set audio (Win 10 64 bit) signal input level of the sound 
card

changes. It changes spontaneously. It changes to a maximum  -
100% of
the  level setting range.

73`s Joe



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--

73, de Serge
F6BHK, ex-VR2LL, G5BHT, FM5GC
PUY SAINT MARTIN, 26 DROME, FRANCE
JN24LP



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Re: [wsjt-devel] Another observed drawback - audio input level

[Joe Taylor]

Please read messages to the list before sending your own on the same topic!

Please read the announcement abou -rc5:

"Windows users will discover that WSJT-X v2.1.0 has been made available 
as a 64-bit MS Windows build for 64-bit versions of Windows since Vista. 
This version has one known defect. The audio input device level will be 
reset to 100% when WSJT-X is started, when the input audio device is 
changed, and when switching to a new configuration. This is a Qt 
framework defect that we have reported and is being fixed in a future 
release; until then users should take care to set the device audio level 
back to 0dB or lower depending on requirements. Note that many sound 
cards and chips have real gain ahead of the ADC, as much as 14dB, which 
will be turned to the maximum due to this defect and is usually 
undesirable when using WSJT-X.


"Despite this annoying defect, we recommend the 64-bit version of WSJT-X 
on MS Windows as it has significant advantages in decoding speed."


-- 73, Joe, K1JT


On 4/30/2019 14:53, Enrique Scheuer wrote:

Same problem here with the same operational conditions.

de Enrique
PY2CP

Em ter, 30 de abr de 2019 às 15:31, Paul Kube > escreveu:


Looking at this ("Microphone Properties" for the USB Audio Codec
that the IC-7300 provides and that WSJT-X uses as input):

miclevel.png

It gets set to 100% whenever WSJT-X 2.1.0-rc5 starts, and I have to
set it to 40% "by hand". WSJT-X  2.0.1 did not have this issue.

Windows 10 Pro x64 here.

73, Paul K6PO


On Tue, Apr 30, 2019 at 5:48 AM Black Michael via wsjt-devel
mailto:wsjt-devel@lists.sourceforge.net>> wrote:

Are you guys looking at the dB level in the audio management
panel?  Or the % level?
WSJT-X does not touch the audio so it has to be Windows doing it.

Recording audio should be at 0dB.

de Mike W9MDB




On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via
wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>> wrote:


It also does it in Win7, audio sound recording to max on restart.
Mike/kf8my



-Original Message-
From: Joe, LB1HI mailto:jo...@lb1hi.no>>
To: wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>>
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input level

Hi,
Another observed  drawback is that after each WSJT-X restart,
previously
pre-set audio (Win 10 64 bit) signal input level of the sound card
changes. It changes spontaneously. It changes to a maximum  -
100% of
the  level setting range.

73`s Joe



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Re: [wsjt-devel] Another observed drawback - audio input level

[Joe Taylor]

Paul --

Did you read the -rc5 announcement before downloading the new package ???

"Windows users will discover that WSJT-X v2.1.0 has been made available 
as a 64-bit MS Windows build for 64-bit versions of Windows since Vista. 
This version has one known defect. The audio input device level will be 
reset to 100% when WSJT-X is started, when the input audio device is 
changed, and when switching to a new configuration. This is a Qt 
framework defect that we have reported and is being fixed in a future 
release; until then users should take care to set the device audio level 
back to 0dB or lower depending on requirements. Note that many sound 
cards and chips have real gain ahead of the ADC, as much as 14dB, which 
will be turned to the maximum due to this defect and is usually 
undesirable when using WSJT-X.


"Despite this annoying defect, we recommend the 64-bit version of WSJT-X 
on MS Windows as it has significant advantages in decoding speed."


-- 73, Joe, K1JT


On 4/30/2019 14:28, Paul Kube wrote:
Looking at this ("Microphone Properties" for the USB Audio Codec that 
the IC-7300 provides and that WSJT-X uses as input):


miclevel.png

It gets set to 100% whenever WSJT-X 2.1.0-rc5 starts, and I have to set 
it to 40% "by hand". WSJT-X  2.0.1 did not have this issue.


Windows 10 Pro x64 here.

73, Paul K6PO


On Tue, Apr 30, 2019 at 5:48 AM Black Michael via wsjt-devel 
> wrote:


Are you guys looking at the dB level in the audio management panel? 
Or the % level?

WSJT-X does not touch the audio so it has to be Windows doing it.

Recording audio should be at 0dB.

de Mike W9MDB




On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via wsjt-devel
mailto:wsjt-devel@lists.sourceforge.net>> wrote:


It also does it in Win7, audio sound recording to max on restart.
Mike/kf8my



-Original Message-
From: Joe, LB1HI mailto:jo...@lb1hi.no>>
To: wsjt-devel mailto:wsjt-devel@lists.sourceforge.net>>
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input level

Hi,
Another observed  drawback is that after each WSJT-X restart,
previously
pre-set audio (Win 10 64 bit) signal input level of the sound card
changes. It changes spontaneously. It changes to a maximum  - 100% of
the  level setting range.

73`s Joe



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Re: [wsjt-devel] Another observed drawback - audio input level

[Enrique Scheuer]

Same problem here with the same operational conditions.

de Enrique
PY2CP

Em ter, 30 de abr de 2019 às 15:31, Paul Kube 
escreveu:

> Looking at this ("Microphone Properties" for the USB Audio Codec that the
> IC-7300 provides and that WSJT-X uses as input):
>
> [image: miclevel.png]
>
> It gets set to 100% whenever WSJT-X 2.1.0-rc5 starts, and I have to set it
> to 40% "by hand". WSJT-X  2.0.1 did not have this issue.
>
> Windows 10 Pro x64 here.
>
> 73, Paul K6PO
>
>
> On Tue, Apr 30, 2019 at 5:48 AM Black Michael via wsjt-devel <
> wsjt-devel@lists.sourceforge.net> wrote:
>
>> Are you guys looking at the dB level in the audio management panel?  Or
>> the % level?
>> WSJT-X does not touch the audio so it has to be Windows doing it.
>>
>> Recording audio should be at 0dB.
>>
>> de Mike W9MDB
>>
>>
>>
>>
>> On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via wsjt-devel <
>> wsjt-devel@lists.sourceforge.net> wrote:
>>
>>
>> It also does it in Win7, audio sound recording to max on restart.
>> Mike/kf8my
>>
>>
>>
>> -Original Message-
>> From: Joe, LB1HI 
>> To: wsjt-devel 
>> Sent: Tue, Apr 30, 2019 6:46 am
>> Subject: [wsjt-devel] Another observed drawback - audio input level
>>
>> Hi,
>> Another observed  drawback is that after each WSJT-X restart, previously
>> pre-set audio (Win 10 64 bit) signal input level of the sound card
>> changes. It changes spontaneously. It changes to a maximum  - 100% of
>> the  level setting range.
>>
>> 73`s Joe
>>
>>
>>
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Re: [wsjt-devel] Another observed drawback - audio input level

[Paul Kube]

Looking at this ("Microphone Properties" for the USB Audio Codec that the
IC-7300 provides and that WSJT-X uses as input):

[image: miclevel.png]

It gets set to 100% whenever WSJT-X 2.1.0-rc5 starts, and I have to set it
to 40% "by hand". WSJT-X  2.0.1 did not have this issue.

Windows 10 Pro x64 here.

73, Paul K6PO


On Tue, Apr 30, 2019 at 5:48 AM Black Michael via wsjt-devel <
wsjt-devel@lists.sourceforge.net> wrote:

> Are you guys looking at the dB level in the audio management panel?  Or
> the % level?
> WSJT-X does not touch the audio so it has to be Windows doing it.
>
> Recording audio should be at 0dB.
>
> de Mike W9MDB
>
>
>
>
> On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via wsjt-devel <
> wsjt-devel@lists.sourceforge.net> wrote:
>
>
> It also does it in Win7, audio sound recording to max on restart.
> Mike/kf8my
>
>
>
> -Original Message-
> From: Joe, LB1HI 
> To: wsjt-devel 
> Sent: Tue, Apr 30, 2019 6:46 am
> Subject: [wsjt-devel] Another observed drawback - audio input level
>
> Hi,
> Another observed  drawback is that after each WSJT-X restart, previously
> pre-set audio (Win 10 64 bit) signal input level of the sound card
> changes. It changes spontaneously. It changes to a maximum  - 100% of
> the  level setting range.
>
> 73`s Joe
>
>
>
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Re: [wsjt-devel] Another observed drawback - audio input level

[Black Michael via wsjt-devel]

Are you guys looking at the dB level in the audio management panel?  Or the % 
level?WSJT-X does not touch the audio so it has to be Windows doing it.
Recording audio should be at 0dB.
de Mike W9MDB

 

On Tuesday, April 30, 2019, 6:55:30 AM CDT, kf8my--- via wsjt-devel 
 wrote:  
 
 It also does it in Win7, audio sound recording to max on restart.Mike/kf8my
 
 
 
-Original Message-
From: Joe, LB1HI 
To: wsjt-devel 
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input level

Hi,
Another observed  drawback is that after each WSJT-X restart, previously 
pre-set audio (Win 10 64 bit) signal input level of the sound card 
changes. It changes spontaneously. It changes to a maximum  - 100% of 
the  level setting range.

73`s Joe



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Re: [wsjt-devel] Another observed drawback - audio input level

[kf8my--- via wsjt-devel]

It also does it in Win7, audio sound recording to max on restart.Mike/kf8my
 
 
 
-Original Message-
From: Joe, LB1HI 
To: wsjt-devel 
Sent: Tue, Apr 30, 2019 6:46 am
Subject: [wsjt-devel] Another observed drawback - audio input level

Hi,
Another observed  drawback is that after each WSJT-X restart, previously 
pre-set audio (Win 10 64 bit) signal input level of the sound card 
changes. It changes spontaneously. It changes to a maximum  - 100% of 
the  level setting range.

73`s Joe



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Re: [wsjt-devel] Another observed drawback - audio input level

[Bill Somerville]

On 30/04/2019 11:42, Joe, LB1HI wrote:

Hi,
Another observed  drawback is that after each WSJT-X restart, 
previously pre-set audio (Win 10 64 bit) signal input level of the 
sound card changes. It changes spontaneously. It changes to a maximum  
- 100% of the  level setting range.


73`s Joe


Hi Joe,

this unfortunate defect in the Qt framework is noted in the release 
announcement. It only impacts the new MS Windows 64-bit build of WSJT-X. 
We have reported the issue to the Qt developers and they have fixed it 
for an upcoming release scheduled for May. Until then you must reset the 
input device audio level after a restart or revert to using the 32-bit 
build of WSJT-X for MS Windows.


73
Bill
G4WJS.



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