Hi Gerhard, Virtual Audio Cable ... on Linux.
Oh the Windoze world ..... VAC is a Windoze term. It is the "loopback" device, part of the ALSA system since Day 1. Though, never setup on "out of the box" systems. Add a file to /etc/modprobe.d/ "snd-aloop.conf" with contents "snd-aloop" and reboot (the easiest way). When booted up again check for it loading, do: cat /proc/asound/cards It will give you 32 channels of "loopback". You are right though, the Linux sound system is hard to get one's head around. With the kernel level drivers (ALSA). Then the "user level" PulseAudio which by default, "claims" all the devices. The your application can either get a list of devices available from either of Pulse or ALSA. In short, tricky. And, just to annoy me, the "snd-aloop" kernel driver is not available in Armbian. Alan VK2ZIW On Sun, 26 May 2019 15:09:17 +0200, gerhard wrote > Hi Alan, > Great to hear that mode2020 is running on a Banana Pi! > I was able to install on Ubuntu 18.04 on a I5-8350. Hardware was just for > 350,- direct from China. > Made some tests in mode 2020 with WebSDRs and on QO-100 satellite. > I am still having problems with correct tuning. Also VAC is not working on > LINUX, so I had to make analog connections - quite noisy. > Do you have any information what to use for VAC unter LINUX? I have been > trying a virtual sink on pulsaudio, but it didn't work correctly as I didn't > see the audio device in FreeDV. > Any other methode to use virtual audio cable on Ubuntu? > regards > Gerhard OE3GBB > > > Am 26.05.2019 13:59, schrieb Al Beard: > Well, > > After a bit of "hacking" removing the "impossible instructions" trying > to determine is this system (not Intel or AMD) has AVX/AVX2 in the > FreeDV GUI Ver 1.4, it actually runs and doesn't crash in 2020 mode. > > At this point, I have what looks like a working FreeDV 2020 app. > > No success on Fedora 29 on an i3 8100 or Ubuntu 18.04 on a current Pentium > bought last week. H110 motherboard, bought for this job!! > > Both crash often and always when [Stop] is pressed. > > CPU load on the Berry, running a remote X session (ssh -Y user@host ) > in 2020 mode, no audio from a real radio yet. > With Waterfall: 60% of one CPU core > With Spectrum: 30% or one CPU core > > In short, light load. > > Alan VK2ZIW > > On Thu, 23 May 2019 15:28:00 +1000, Al Beard wroteHi all, > > Can somebody compile this up and test please? > > You will need "rtaudio" package installed > > http://www.music.mcgill.ca/~gary/rtaudio/ > > And of course, the Codec2 2020 library with LPCnet. > > Then just a Linux PC with a stereo audio interface and speaker. > > Do a Tx in 700D mode and note the audio. > Then try 2020 mode. > > All I get is blurt, silence, blurt, silence etc.. > > I want this app working for a portable setup ie. no PC or laptop. > A Pi. > > Alan VK2ZIW > > On Thu, 23 May 2019 12:48:01 +1000, Al Beard wroteHi all, > > Not so fast... > > On this Asus H110M-A system with a Pentium G4560 @ 3.50GHz > we only have USB3 ports: > > 3 [S3 ]: USB-Audio - Sound Blaster Play! 3 > > The audio from "fdvcore" is "bitsy", not the nice smooth > audio when the same USB dongle is on the Armbian system (Banana Pi > M2 Berry) > > FreeDV 2020 GUI on Armbian > ========================== > > Though the "cmake" system searches for AVX/AVX2 or Neon, > when doing "make" impossible instructions (for the x86_64 CPU) > can't be assembled in fdmdv2_main.cpp as I recall. > Git: git rev-list --count HEAD > 1922 > > Somebody has got to give it a go.... > > Alan VK2ZIW > > --------------------------------------------------- > Alan Beard > > OpenWebMail 2.53 > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > --------------------------------------------------- > Alan Beard > > OpenWebMail 2.53 > > --------------------------------------------------- > Alan Beard > > OpenWebMail 2.53 > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 --------------------------------------------------- Alan Beard OpenWebMail 2.53
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