Re: waterfall malfunction (?) with fldigi-3.23.22.8

[Giuseppe C. <giu...@un...>]

On Wed, 22 Feb 2017, Ed wrote:

> On Wed, 22 Feb 2017 14:06:19 +0100 (CET)
> Giuseppe Ciaccio <giu...@un...> wrote:
>
>> Hello again,
>>
>> I've installed fldigi-3.23.22.8, selected the CW modem, turned on the
>> receiver, tuned the receiver to a band with some audible cw signals.
>> But the waterfall fails to show the signals, and instead shows a
>> exponentially-decaying band of palette colors.  See attached
>> screenshot.  With the older release of fldigi (3.20.21), however,
>> things works as usual.  Help will be appreciated...
>>
>> Thank you,
>>
>> iz1qze Giuseppe
>
> You either have the wrong sound card selected, or your CW Sweetspot
> needs to be set to 2500.
>
> Did you follow this :
>
> https://fedorahosted.org/fldigi/wiki/Documentation/HOWTO/BuildOnDebian

Sound card is selected correctly.  I have two ones, and when I switch to the other (or when I switch off the receiver) the waterfall becomes blank so the program is "hearing" something indeed.

Setting CW sweet spot to 2500 did not help (and was unneeded with fldigi 3.20).

I'm using Slackware 14.1.  The installation procedure for fldigi was as usual:  ./configure && make && make install

(fltk 1.3 was previously installed as a prebuilt Slackware package).

>
> Ed W3NR
>
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