Comments (6)
JvanKatwijk
commented on June 27, 2024
There are two possible causes for interrupted sound, one being the latency
setting, the other one being too weak a signal. Latency can be set in the
ini
file, a file created in the home directory. Right now I am on holidays and
have no access to my development environment, but I think the line in the
ini file (something like .qt-dab.ini) is latency=xxx
…On Sun, Mar 10, 2019, 9:58 PM phil-audio ***@***.***> wrote:
hello,
sorry to ask you that, but I'm newbee in RPI and linux commands.
I managed to install on your RPI3 your application, I managed to scan my
channels (Belgium Hainaut) but I have cuts of sound, you speak of latency =
2 but I do not know where it should find it in which file?
Can you give some information.
thank you so much
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phil-audio
commented on June 27, 2024
hello,
Thank you for your reply,
I would wait for you to come back from vacation, enjoy well.
Then or can watch or I can find this famous file, because I found nothing.
Thank's Phil
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phil-audio
commented on June 27, 2024
hi ,
i found ( hiden) .dabradio.ini , i read a files
General :
6A=1
6B=-1
[rtlsdrSettings]
agcMode=false
ifgain=60
I did not see anything else as parameters.
I added "latency = 2" to see if it improved the sound, but it did not change anything.
thank's Phil
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JvanKatwijk
commented on June 27, 2024
As said earlier, there are two possible causes for audio dropout, one being
the latency in "slow" computers as eq. RPI2, the other
errors in decoding the audio data.
In order to make the latter cause more visible (in qt-dab it is visible), I
added a progressbar to the main widget in dabradio
showing the successrate of audio decoding.
Since the figure is combined figure (i.e. it depends on frame errors, on
unrecoverable errors in the reed-solomon decoding and errors
in the aacdecoding) it might not be completely accurate, but it should give
a reasonable indication on whether the audio dropouts
are caused by unrecoverable errors in the decoding (i.e. a weal signal) or
by the audio system of the computing device
Op do 14 mrt. 2019 om 17:37 schreef phil-audio <[email protected]>:
… hi ,
i found ( hiden) .dabradio.ini , i read a files
General :
6A=1
6B=-1
[rtlsdrSettings]
agcMode=false
ifgain=60
I did not see anything else as parameters.
I added "latency = 2" to see if it improved the sound, but it did not
change anything.
thank's Phil
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phil-audio
commented on June 27, 2024
Hello ,
thank you for your patience.
my Raspberry is a model 3.
so he must be powerful enough in calculation.
As stated in the previous message, where is the latency setting? because I did not find it anywhere.
the QT-dab2.0 software is a ready-made image that must be run under Rasbian, sorry but I'm not really a linux user.
Thanks, Phil
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JvanKatwijk
commented on June 27, 2024
The qt-dab software runs on an rpi3. The latency setting is - as said - in
the ".qt-dab.ini" file,
// situations wrt the output buffering. For windows and the RPI
// this need to be a pretty large value (e.g. 5 to 10)
latency =
dabSettings -> value ("latency", 5). toInt ();
It just reads "latency=xx", the default value is 5.
If you are running qt-dab (I was under the impression that you were running
dabradio) then in the
widget "Technical data" it shows - in progressbars - the "quality of the
various decoding steps"
If you are running the rpi3 headless, then be aware that lost of data are
transmitted over the network
Hope this helps
Op wo 20 mrt. 2019 om 19:10 schreef phil-audio <[email protected]>:
… Hello ,
thank you for your patience.
my Raspberry is a model 3.
so he must be powerful enough in calculation.
As stated in the previous message, where is the latency setting? because I
did not find it anywhere.
the QT-dab2.0 software is a ready-made image that must be run under
Rasbian, sorry but I'm not really a linux user.
Thanks, Phil
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