FreeDV-JATE [Just Another TNC Experiment]

001_HIGHSNR_STDIO_AUDIO TEST SUITE

INSTALL TEST SUITE

Install prerequierements

sudo apt update
sudo apt upgrade
sudo apt install git cmake build-essential python3-pip portaudio19-dev python3-pyaudio
pip3 install crcengine
pip3 install threading

Change into a directory of your choice Run the following commands --> They will download and compile the latest codec2 ( dr-packet ) files and LPCNet as well into the directory of your choice

wget https://raw.githubusercontent.com/DJ2LS/FreeDV-JATE/001_HIGHSNR_STDIO_AUDIO/install_test_suite.sh
chmod +x install_test_suite.sh
./install_test_suite.sh

PARAMETERS

parameter	description	side
- -mode 12	set the mode for FreeDV ( 10,11,12 )	TX & RX
- -delay 1	set the delay between burst	TX
- -frames 1	set the number of frames per burst	TX & RX
- -bursts 1	set the number of bursts	TX & RX
- -input "audio"	if set, program switches to audio instead of stdin	RX
- -audioinput 2	set the audio device	RX
- -output "audio"	if set, program switches to audio instead of stdout	TX
- -audiooutput 1	set the audio device	TX
- -debug	if used, print additional debugging output	RX

STDIO TESTS FOR TERMINAL USAGE ONLY

python3 test_tx.py --mode 12 --delay 500 --frames 2 --bursts 1 | python3 test_rx.py --mode 12 --frames 2 --bursts 1

AUDIO TESTS VIA VIRTUAL AUDIO DEVICE

Create audio sinkhole and subdevices

Note: This command needs to be run again after every reboot

sudo modprobe snd-aloop index=1,2 enable=1,1 pcm_substreams=1,1 id=CHAT1,CHAT2

check if devices have been created

aplay -l

Output should be like this:

Karte 0: Intel [HDA Intel], Gerät 0: Generic Analog [Generic Analog]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 1: CHAT1 [Loopback], Gerät 0: Loopback PCM [Loopback PCM]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 1: CHAT1 [Loopback], Gerät 1: Loopback PCM [Loopback PCM]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 2: CHAT2 [Loopback], Gerät 0: Loopback PCM [Loopback PCM]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0
Karte 2: CHAT2 [Loopback], Gerät 1: Loopback PCM [Loopback PCM]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0

Run tests:

Its important, to run TEST_RX at first to reduce the chance that we get some system side audio errors. Tests are showing, that its important to start with audio device "2" at first and then go to the lower virtual devices "1". Audio device "0" is the default sound card.

RX side

python3 test_rx.py --mode 12 --frames 2 --bursts 1 --input "audio" --audioinput 2 --debug

TX side

python3 test_tx.py --mode 12 --delay 500 --frames 2 --bursts 1 --output "audio" --audiooutput 1

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