Rein, Igain is a control on kmix. See attached screen picture where I have kmix and the krecord level detector. Also one with gamix. 73 Arie ----- Original Message ----- From: Rein A. Smit <rein0zn@xxxxxxxxxxxxx> To: <linrad@xxxxxxxxxxxxxxxxxxxxxx> Sent: Tuesday, May 20, 2003 6:23 PM Subject: Re: [linrad] Linrd installation...a few comments > > > > Hello Arie, > > I have put things away for my trip. Have the computer, > transceiver, etc in the living room when I do this kind of > work. Can't find enough room in the shack. So I have to wait > to give you the results. > Yes, I can mute the input but I am quite sure if I do so > the I do not save any longer. > What is the so called IGAIN ( MIC gain? ) or is that in Krecord? > Anyway I am quite sure that If I turned off the MIC gain in the > mixer, I did not see any spectrum/waterfall display in Linrad. > > 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 un-mute the mic channel and set the audio level. > > "You can or must set the mic level with the slider but monitoring with > the un-mute, fine" then you mute the mike, I suppose the volume > control stays operational, is that right? > What does it effect, the audio signal amplitude going where? > > > > 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. > > Is it possible that linrad is muted perhaps? And if the MIC is off, > nothing is coming through? But as said, MIC off, no > spectrum/waterfall. > > It might have been a bias that I acquired against onboard sound > cards that got me on this "sound card problem route" That would > be real interesting! > > I made a soort of sketch of the Krecord workings and > looking at it, > 1 There is a straight permanent connection from the input > terminal on the computer to let's say the capture switch, > from the other side of the capture switch to the SA section Did > not look at the level indicator. > > 2 I wrote down a path from the input through the mike through the > master to the output. I guess if it is true as you say why is this > thing called MIC and not bypass? > > 3 Another path from the input after the capture I believe, via the > manual "record select" function to the recording function if turned > on, > and from the playback function through the PCM "Switch" to te audio > I did not check whether this was through the master or not. > Should not matter, I think. > > Bottom line is that this senario would provide the working as you > describe it. > > It just shifts the problem to something else I think though not > any longer the sound card/mixer. I can't explain the waterfall going > to the MIC in Linda. I would think that the waterfall display should > go only via the "capture", I am not sure without looking at it. > But then why don't I get processed audio from Linda If Linda > supplies data through the PCM channel, what is a direct path to > the output. > > Answer perhaps Linda is blocked for some reason could that be > the case? > > You say you have the MIC turned off, Do you see the wide spectrum > display working? I thought one could hen select a central frog > putting cursor somewhere in the spectrum domain, This is working by > the way, I get a response from this on the passband display I > would call it. What do I do next to get audio out from Linrad > provided the PCM in connected to LINRAD ? > Are there parameters to be selected at this point to get filtered > audio. I have not really looked at it as I assumed as per > instructions I should have had audio some form of audio from > Lirad. > > 73 Rein > > > > > > 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 > > > > > > > > >
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