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Hello Wolf,
if I turn down the gain of the output amp,nothing
will change,so tu for the advice,it is an old laptop,
henny cpm
best 73's
----- Original Message -----
Sent: Friday, July 08, 2011 7:29 PM
Subject: Re: LF: Speclab
Hello Henny,
If you turn down the gain of the 'output
amplifier' in the circuit window, does the sound from the soundcard disappear
(it should) ?
If not, I guess it's the old 'mixer' problem again - many
soundcards are configured to route the input (from the "line in" jack)
directly to the output ("line out"). SL doesn't touch any of the soundcard
settings, so you need to find the right control (slider, or mute option) in
the soundcard's audio volume control panel (sndvol32, or whatever program came
along with the soundcard).
The effect of the hum filter should be
easily audible, because that's what it was designed for. Btw for 'natural
radio' listening, the FFT-based automatic multi-notch filter is preferred over
the old hum filter (=comb filter).
All the best,
Wolf
DL4YHF .
P.S: If you post your question on the SL User's group, and
mention the model of your soundcard, other users may be able to help.
The
group's site is http://tech.groups.yahoo.com/group/SpectrumLabUsers/
.
Am 08.07.2011 14:28, schrieb henny van elst:
Hello Wolf,
maby you can help me out with a problem I
have with Speclab.I am using speclab to listen to sferics and whistlers.In
the components window I can enable the humfilter ,the effect is very clearly
visible on the spectrogram,but I can,t hear the difference on the speaker.Am
I forgetting something or is it just not possible on some old soundcards.It
works well on my desktop...Many thank in advance,
73
Henny
CPM..........
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