- ... You might have to wait until the 2.05 release for a resolution to your intermittent sound card problem. Your sound card might require a sampling rate ofMessage 1 of 43 , Dec 2, 2007View SourceRick wrote:
> It took quite a while, but Ubuntu 7.10 was the first Linux variant thatYou might have to wait until the 2.05 release for a resolution to your
> made it possible to drive my 22" widescreen Samsung with native
> resolution. So I can now dual boot between XP and Ubuntu on the
> emachines and have Vista on the HP computer with a KVM to switch between
> them. I mostly use the Vista machine for general computer use and the
> emachines for ham digital due to only wanting to set up the interfacing
> for one computer. I have two sound cards in the emachines, the built-in
> (but not very accurate Realtek) and a Sound Blaster Live MP3+ which
> works extremely well under XP with DXLab Commander/Multipsk or Ham Radio
> Deluxe/Digital Master 780.
> While I can download fldigi 1.33 via the repository, and I can boot the
> program, I still have the past problem of an interrupting of the audio
> tones, instead of a pure tone when sending.
intermittent sound card problem. Your sound card might require a
sampling rate of 44100 or 48000. It is probably performing internal
translation of the 8000 sample rate and mangling the audio.
> It shows the waterfall andYou can put the binary file in /usr/local/bin. Lets say that you
> phase lock on the scope but does not actually print anything on the screen.
> I removed the program, including the .fldigi hidden file, and downloaded
> the 2.04 binary. I extract the file with the CLI and also with File
> Roller and it shows a 1.6 MB executable with logo, but it does not
> actually do anything.
extracted the file to:
Open the CLI and then enter
sudo cp fldigi /usr/local/bin
You can put the icon anywhere that you want, but I keep local icons in
/home/myhome/icons. For you that might be
/home/n9vv/icons. You probably have to create the folder /home/n9vv/icons.
To create an icon on the desktop that you can link to for execution do
Right click on the desktop and select "Create Launcher". The name is
fldigi. Browser to /usr/local/bin and click on the file fldigi for the
Click on the icon button in the dialog that is still open. Select the
icon file, fldigi.png that you previously placed in the /home/n9vv/icons
You should not be able to launch fldigi from the desktop.
- Hi Tim, ... Portaudio is a cross platform API. It sits between your application and the underlying sound system, in most cases folks are using ALSA. In yourMessage 43 of 43 , Dec 7, 2007View SourceHi Tim,
Tim Gimmel wrote:
> Rick,Portaudio is a cross platform API. It sits between your application and
> The new portaudio stuff in Fldigi 2.05 fixed my problem with the
> "ticking" sound. Can you tell me how it (portaudio) works, or give me
> some hints that I can give to the alsa folks? WSJT 6 uses portaudio
> also and would love to be able to make it work correctly. I have to
> admit I have been working with Linux for over 10 years and I still just
> don't understand the audio system. If you know of a site that has a
> good explanation of Linux audio from oss to alsa to portaudio I would
> love to read it!
the underlying sound system, in most cases folks are using ALSA.
In your case, you were able to use Portaudio and the FLdigi code to
force a supported sample rate that your Intel HD sound card could handle
natively. This is 44,100, 48,000. The card won't support lower sample
rates, but digital apps want to use them, like 8000, 11,025, etc. There
are a variety of standard sample rates for sound cards, yours does not
support all of these (at least in Linux and ALSA.) And that's why the
ticking. ALSA had to up convert, and the Intel HD driver for ALSA is not
up to the task right now.
Portaudio and a forced (in FLDIGI) supported sample rate fixed the
ticking because no conversion was then needed on the sound stream.
If WSJT can select a sample rate, you should be able to take care of the
problem easily. You might want to ask Joe to put that in the code.
Rick Kunath, k9ao