gnu grc

[adcockfred]

running gnu grc set up, have good signal, but alsa does not hear out put of grc
not real savey on linux sound which everyone says is easier then windows

 

[boatbod]

running gnu grc set up, have good signal, but alsa does not hear out put of grc
not real savey on linux sound which everyone says is easier then windows

You're rather sparse on information such as what platform you're running on, whether it's a native or virtual environment and so forth. Do sounds play from other Linux apps?

 

[adcockfred]

Oh ok running gnu grc on mint no virtual
have a working copy of fm demod but the bad copy is am demod running through upverter
have plenty of decode -15 db
the Cuban station is stronger than my local 1070 here in Houston
I have tried all the google stuff and gnu stuff too
started out on laptop then moved ssd in to the I-5 with faster processor and got more functionality
that new guy helped me get the gqrx and dsd going on mint
so it just might be a launch order to get sound to work
came a long way in my Linux, at least I can read and kinds understand
I backed out of the public service deal for a while and let the youngsters take the money
we are vital but no iron coming in
but we finally got in NCIC when win 7 died

 

[boatbod]

If you have a .wav file handy you can open a terminal screen and use the 'aplay' command to play the wav file.

aplay test.wav

 

[adcockfred]

says no such file or directory
aplay -L works

 

[adcockfred]

aplay -l gives list of playback devices
2 analogue of 4
oem@acer:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: VT2020 Analog [VT2020 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: VT2020 Digital [VT2020 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 2: VT2020 Alt Analog [VT2020 Alt Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0

 

[adcockfred]

em@acer:~$ ls
AM_Dmod.grc Fm_Receiver.grc gr-baz sdrsharp
am_receiver.py FM_RECIEVER.grc Music Templates
Desktop fm_reciever.py new-test.grc top_block.py
digital_speech gqrx_20200328_233319_440599000.wav Pictures Videos
Documents gqrx_20200328_233327_440599000.wav Public winehq.key
Downloads gqrx_20200328_233329_440599000.wav rtl-sdr
oem@acer:~$ aplay gqrx_20200328_233319_440599000.wav
Playing WAVE 'gqrx_20200328_233319_440599000.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
oem@acer:~$
only wav file i can find from gqrx
is it inverted ?

 

[boatbod]

You'd need to have a copy of the file "test.wav" in order to be able to play it
I'd anticipate you can find something (anything .wav) online and download it, then substitute the actual file name in the command line for aplay.

 

[adcockfred]

yeah, I agree but most of my experience is for running live broadcasts and I do not have much recording ability. Especially in Linux.
I did get both a sample of both instances of grc am and fm, but not from the command line. I will work on that tonight.
I will get back in the command I made run and see what I can direct.
The am audio was null, as expected. I can see the noise but it will come out of app.
I also have a incomplete copy of sdr# on this disk. and a good copy of gqrx with excellent audio, but it will not tune under 24 mHz.
I hear ubuntu 20.04 is out

thanks for the mentoring

 

[adcockfred]

Yeah, I have been battering this player stuff around this week.
Do you have a favorite SDR app on Linux?

 

[a417]

I do.
gqrx and grc for visualizing and decoding, and op25 for listening to my local p25 system.

 

[boatbod]

I do.
gqrx and grc for visualizing and decoding, and op25 for listening to my local p25 system.

op25 mostly, and sometimes gqrx for diagnostic purposes.

 

[adcockfred]

Yeah, I started public service monitoring in the early 60' and in earnest in 76' when I got out of the road house and moved into the wrecker.
Any thoughs on this gqrx.git program?

 

[boatbod]

Yeah, I started public service monitoring in the early 60' and in earnest in 76' when I got out of the road house and moved into the wrecker.
Any thoughs on this gqrx.git program?

The easiest way to install gqrx is from a pre-built package. On most debian-based systems (such as Ubuntu, Mint, RPi) you can just do the following:

sudo apt-get install gqrx-sdr