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Re: [linrad] Linrd installation...a few comments
- Subject: Re: [linrad] Linrd installation...a few comments
- From: "Arie Dogterom" <pa0ez@xxxxxxxxxxxxx
- Date: Mon, 2 Jun 2003 11:30:56 +0200
Hallo Rein,
Ik blijf er bij dat kmix niet een goede referentie is. Alsamixergui of gamix
zijn de goede keuze.
Als linrad in staat is met de U functie de geluidskaart te zien en in te
stellen dan moet je in het spectrumbeeld het ingangssignaal kunnen zien.
Als je met de muis op de draagolf in dat spectrumbeeld klikt zal er na korte
tijd via PCM signaal naar je luidspreker moeten gaan. Je ziet ook het niveau
van het uitgangssignaal als een blokje op en neer gaan in het
uitgangsfilterbeeld.
Als dat blokje laat zien dat er signaal is dan zou je het moeten kunnen
horen als het niveau van de master en pcm regelaars goed zijn.
Met krecord kun je tevoren zien of het ingangssignaal inderdaad voor de
opname doorkomt, maar niet direct naar de luidspreker gaat.
Ik denk dat wanneer krecord werkt, linrad het ook moet doen omdat beide
gebruik maken van dezelfde /dev/dsp. Daarom kunnen ze ook niet tegelijk
aktief zijn.
Er is niets van triggering aanwezig. Zodra linrad het filter op de goede
frequentie heeft staan, moet er signaal uit komen. De toonhoogte te regelen
door die verticale bakjes in het beeld te schuiven.
73
Arie
----- Original Message -----
From: Rein A. Smit <rein0zn@xxxxxxxxxxxxx>
To: <linrad@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Monday, June 02, 2003 1:25 AM
Subject: Re: [linrad] Linrd installation...a few comments
>
> Hi Arie,
>
> Waarom denk je dat als Krecord werkt, Linrad ook zou werken.
> Ik heb een andere soundkaart nu en Krecord werkt met de MIC uit!!!
> Kan nu vanuit krecord de opgenomen audio terug spelen zonder
> iets in de mixer te doen. Dat was onmogelijk met de AC97!!
>
> Ondanks dat Krecord werkt, totaal geen geluid van Linrad zoals eerder
> met die ander kaart.
> Heb je enig idee hoe de autput van linrad wordt geschakelt? Is het
> als een sqelch?
> Wat triggert de audio output?
> Is het mogelijk de parameters zodanig te zetten dat je geen audio
> krijgt?
> Als je clickt met de muis op ruis schakelt de output dan aan? Of moet
> er een signaal zijn?
> Denk je dat mogelijk is dat er iets met de processing verkeerd gaat
> en de output geblokkerd blijft?
>
> 73 Rein
>
> Arie Dogterom wrote:
> >
> > Rein,
> > I played with kmix and even with that programme I can mute the input
in my
> > case mic) and by controlling "IGain" I can set the recording level. Mic
is
> > set for recording and if you want to hear what you are recording you of
> > course can unmute the mic channel and set the audio level.
> > But for linrad you have to mute the mic channel and use the Igain for
the
> > input recording level. Then linrad runs without the signal bypassing
linrad.
> >
> > note : It is a pity that on my laptop the only input is mic, which is
mono.
> > Line in is not accessible from the outside. I probably have to find it
> > somewhere on the motherboard.
> > 73
> > Arie
> >
> > ----- Original Message -----
> > From: Rein A. Smit <rein0zn@xxxxxxxxxxxxx>
> > To: <linrad@xxxxxxxxxxxxxxxxxxxxxx>
> > Sent: Tuesday, May 20, 2003 1:22 PM
> > Subject: Re: [linrad] Linrd installation...a few comments
> >
> > >
> > >
> > > Hello Arie,
> > >
> > >
> > > Glad to hear from you and thanks.
> > >
> > > Let me go back, I have the MIC un-muted, connected and hear the
signal,
> > > see the spectrum on the spectrum analyser display from my source.
> > > This is running via "capture"
> > > Then I select "record" see the .wax file building.
> > > That is all fine, actually I got that with Linrad the first time
> > > I installed it. ( source audio in freq/waterfall )
> > > Gain, base line adjustment are working, average FFT, parameter is
> > > all responding again with just the standard Mandrake installation
> > >
> > > Then I decide to play back:
> > >
> > > The stored audio is being played back and I see it on de spectrum
> > > display via "capture" if I remember well fine. previously recorded
audio
> > > but if I do not mute the miKe or turn the receiver output down, I also
> > > get the the receiver real time audio in the audio output
> > >
> > > I assumed that if I would play back that the input channel would be
> > > muted by Krecord. Isn't that the logic thing to do?
> > >
> > > Anyway it does not do that i y case at least! Then I also assume
> > > that linrad switches in the software between sampling from the input
> > > ( mic or what ever ) and output from the processed software.
> > > Of course real audio should never end up in the audio output channel.
> > > As a matter of fact the sound card should be set up for this routing
> > > when you start Linrad and remain like that ( IE NO switching during
> > > acquisition / display )
> > >
> > > Repeat for Krecord:
> > >
> > > input sample -> DAC, ETC ( MIC ON/Off ) LINRAD Processing
> > > ( PCM ON/OFF )-> DAC, ERT - > output sample -> Volume out.
> > >
> > > I assumed that Krecord would provided for MIC OFF/ON and PCM ON/OFF
> > > as part of the "manual" record/display selection,
> > >
> > > Is that true, ie should the be mic channel be manually turned of
> > > or not. I would think not!
> > >
> > > In linrad their is no playing of the raw input audio.
> > > However the audio section needs to be permanently connected
> > > to the processed digital audio from LINRAD via PCM and the input needs
> > > to be permanently connected to the digitizing part of the sound card
> > > but NOT to the audio section ( analog signal ) That is what is
failing.
> > > but Krecord seems partially do this switching in my case.
> > >
> > > Have you had time to review the mute/slider functions in your Alsa-
> > > mixer vs what I sent you from my alsamixer.
> > >
> > > Have you any new thoughts about the channel selection issue in
> > > your alsamixer vs the lack off that function all together in my
> > > version/installed version.
> > >
> > > I am going to be in Odense next week for a few days and later in
> > > Oxford for work. I am not sure I can make it to Holland. Could you
> > > email me your phone number direct? I would like to talk to you
> > > live for a little bit at least.
> > >
> > > BTW Last night I could not even get into Matt's domain URL
> > >
> > > 73 Rein
> > >
> > >
> > >
> > >
> > > Arie Dogterom wrote:
> > > >
> > > > Rein,
> > > > You should mute the input channel and activate capture. Then you
will
> > see at
> > > > krecord level indicator that there is a recording signal while you
do
> > not
> > > > hear it. Then running krecord to play it back( goes via the pcm
channel)
> > you
> > > > should hear the recording. Is that ok, stop krecord and run linrad.
Foor
> > > > sure you then only will hear linrad processed sounds
> > > > 73
> > > > Arie
> > > >
> > > > ----- Original Message -----
> > > > From: Rein A. Smit <rein0zn@xxxxxxxxxxxxx>
> > > > To: <linrad@xxxxxxxxxxxxxxxxxxxxxx>
> > > > Sent: Tuesday, May 20, 2003 6:01 AM
> > > > Subject: Re: [linrad] Linrd installation...a few comments
> > > >
> > > > >
> > > > > Hi John
> > > > >
> > > > > What is it, you mean by cheaper onboard sound cards?
> > > > > PCI stuff in particular. There have been issues with sound
> > > > > cards all the way back to FFTDSP by Af9Y and plenty of DSP
> > > > > programs being sensitive to the type of sound cards being
> > > > > Some of them wanted 8 bit cards. I type this on a WIN95
> > > > > machine with a 8 bit card installed. FFTDSP, DSPBlaster
> > > > > run fine under DOS.
> > > > >
> > > > > I suppose you are talking about the price of the mother board
> > > > > to a certain extent.
> > > > > Though it would be hard to detect any correlation in the final
> > > > > price of the mother board and the sound section.
> > > > > I have quite a few questions about this sound thing here.
> > > > > Just for the fun, I will research the expensive boards and
what
> > they
> > > > > use for onboard audio systems. ( ASUS et al )
> > > > > I have questioned myself whether there is actually a problem
with
> > > > > that sound section. However it does everything in WIN98SE and
as
> > > > > a matter of fact in Linux as well .
> > > > > It is also working with this krecord program using .wav files
> > > > > In that mode however the mic/line inputs are not being muted.
> > > > > it is not a matter of cross talk, the mic signal passes
through
> > > > > un-attenuated This krecord is neat, you can listen to signals
> > > > > record them in memory and play them back, in my case I have to
> > > > > turn down the audio from the receiver.
> > > > >
> > > > > PA0SE has the same audio section running on a laptop and
running
> > > > > Linrad. The real strange point is that the alsamixer that he
is
> > > > > using from alsa_utils-0.9.3 has the ability to select channels
and
> > > > > allows for path switching/selection and I have nothing of that
> > > > > in my installation, as if the mixer adjusts itself to who
knows
> > > > > what! The usual volume controls, MIC,LINE, Capture, PCM and
> > > > > MASTER work OK.
> > > > >
> > > > > I have been trying to find useful info and there are hundreds
> > > > > of messages of people asking/reporting about that section but
> > > > > it are always problems about no sound at all, distorted sound,
> > > > > low volume etc. I have nothing of that as long as I do not try
> > > > > to get Linrads output. Also Linrad reports the card properly
> > > > > detected and working when I go to the set-up.
> > > > > Do you have Linrad running? If so perhaps you could run
through
> > > > >
> > > > > http://www.nitehawk.com/linrad_dat/
> > > > >
> > > > > Nothing BEATS information from users with a working setup.
> > > > >
> > > > > 73 Rein, PA0ZN
> > > > >
> > > > >
> > > > >
> > > > > "John Harrison, NI1B" wrote:
> > > > > >
> > > > > > Hi All,
> > > > > >
> > > > > > A couple of comments about getting a useful Linrad setup.
> > > > > >
> > > > > > MANY of the recent on-board and cheaper internal PCI cards
have
> > GROSS
> > > > > > problems.
> > > > > >
> > > > > > In two cases (one on board and one add on card) the card had
NO
> > > > > > anti-aliasing filter (at all). The card would pick up high
frequency
> > > > > > signals and noise and fold it over into the lower freqs with NO
> > > > > > attenuation !!
> > > > > >
> > > > > > In the other PCI case, the card was apparently very slow in
> > taking
> > > > > > samples so virtually NO TIME was left for Linrad :(
> > > > > >
> > > > > > ALL of the ISA cards I have tried have had neither of these
> > problems,
> > > > > > but try to find a recent motherboard with an ISA slot!!
> > > > > >
> > > > > > Anyways just another two technical details to check for when
you
> > are
> > > > > > selecting a sound card.
> > > > > >
> > > > > > warm regards,
> > > > > > john, ni1b
> > > > >
> > >
>
LINRADDARNIL