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Re: [linrad] Linrd installation...a few comments
Why can't we speak in a language that everybody on the list can
understand?
On Sun, 1 Jun 2003, Rein A. Smit wrote:
>
> 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