All Blog Posts Tagged 'QRQcw' (144)

brief demo of having the AD5DZ CW Keyboard send a text file at 71wpm and then adjusting the KB's many settings to fine tune how the CW sounds for best COPY BY EAR during a QRQ CW training session

https://odysee.com/@QRQcw:e/QRQcwWITHad5dzCWkeyboard:9?r=HnknoaHhbXtaiVWpkvmmaPWrfFby4Cs4

Gstreamer is for all OS'es MAC, LINUX, WINDOWS 10, Raspberry Pi

https://gstreamer.freedesktop.org/download/

Recri Keyer SDR Modules & CW Keyer, CW Keyboard…

experimental setup to QSO QRQ CW at 18Khz VLF RF over ip - using a PEER to PEER Gstreamer PIPELINE TCP/ip setup and a Raspberry PI as a REMOTE VLF RX/ RE-TRANSMITTER

a PI2B is setup to RECEIVE another OP's VLF RF over IP transmission(CW at 18Khz) using a Gstreamer rtp TCP/ip PIPELINE - using the WAVPACK CODEC...the PI2b…

test to see how stable the CW TIMING is at QRQ CW speed * 80 wpm * when using ASEQNET server/CLIENT setup midi over tcp/ip

http://ccrma.stanford.edu/planetccrma/man/man1/aseqnet.1.html

a MIDI CW KEYBOARD is used as the CW MIDI…

wireless transmission from the CW KEYER - keying a 555 at 40 Khz - to a wireless LF RF BAND software receiver - demod'N the 40 Khz CW Keyer LF BAND transmitter's CW

the TX and RX antenna are using a high Q , series/parallel resonated FERRITE BOBBIN CORE INDUCTOR COIL - @2mH each - series and parallel resonating capacitors…

22 individual CW software KEYBOARDs are sending a CW text file from 500 hertz up to 11Khz

separated individually by 500 hertz from one signal to another

to pick a CW SPEED/signal that you would like to copy by ear - use your SDR

- here is a quick example of doing that here with a…

60 wpm test - classic R-C exponential envelope VS Raised Cosine - for copying by ear - which do you prefer ?

NOTE: to get the RAISED COSINE edges from YPlog, its RISE/FALL time was set to zero and sent through this simple Gstreamer CW AUDIO BANDPASS filter…

demo of taking the harsh square wave output of any kind of keyed CPO or CW Keyer's audio output - and RE-KEYING it exactly but transforming it to a pure sine wave CW NOTE with Raised Cosine edges (only takes 6 milliseconds from start to finish) uses ZAMGATE in SIDECHAIN MODE which has a pure sine wave TONE GENERATOR connected to Zamgate port…

demo of using the Gstreamer NellyMoser encoder/decoder

for sending Morse Code Audio over ip with Gstreamer scripts

TX

GST_DEBUG=3 gst-launch-1.0 -v jackaudiosrc ! "audio/x-raw,channels=1" ! audioconvert ! avenc_nellymoser ! udpsink host=(ip address of rx)…

brief demo of using a chucK .ck file, "morse.ck" for making a QRQ CW Morse Code Keyboard APP - for sending CW to the Mumble INput on iCW

https://chuck.cs.princeton.edu/release/…

Morse Code Practice when listening to a YouTube CW video (LINUX version) on Linux, using JACK AUDIO CONNECTION KIT, with the Pulse-jack modules, using QUISK SDR to select which CW SPEED from the the multiple CW signals that are playing on the video, which one you would like listen to...etc.. hitting the YOUTUBE SHORTCUTS for REVIEW to repeat…

the Vorbis Codec with RTP PAYLOADING is used in this demo, to send 60 wpm Morse Code audio over the internet using a VPN server that is located several states away....it returns back and goes to a Raspberry PI 4 Receiver which re-directs what it hears back to the recording PC so you can hear what the PI hears...

TRANSMIT…

ehoCW is the CW keyer, since it can use JackRouter as its ASIO DRIVER and work in low latency on windows 10 using the windows version of JACK AUDIO CONNECTION KIT...UltraGrid 1.6, is the AUDIO OVER ip APP, and it has NATIVE JACK AUDIO support so you can hook ehoCW's audio output directly to the input of ULtraGrid and send it out over the…

Brief demo of 4 QRQ CW OPs in conference, full duplex, 2-way, OPUS CODEC, Gstreamer pipelines, using ZEROtier's SDN network ip tables...each OP connecting to the same RASPBERRY PI SERVER and receiving everyone's CW AUDIO a Raspberry PI 4 is setup as a selective forwarding unit(SFU)... so each incoming morse code audio stream goes right back…

testing GOOGLE DUO's ability to send CW over the internet, and finding the best settings to keep GOOGLE DUO from degrading the CW AUDIO TONES from its internal noise filtering, AGC and echo cancellation engines... (to stop Google Duo from doing that, a very tiny volume of low freq sine wave was applied(7.83 hz) and then the CW was also sent…

end a text file from CWop1 over to CWop2, both using Jitsi Meet App for connecting online for a Morse Code audio QSO...turning off WEBCAM to save CPU usage and also using a specialized Jitsi Meet script that preserves the ORIGINAL CW AUDIO :…

zitaNJbridge provides the near zero latency audio over ip link between the RIG/pi4 interface and the remote OP's desktop https://kokkinizita.linuxaudio.org/linuxaudio/

recri keyer's CW Keyer APPs used from :…

this is a follow video to this one in this series:

https://youtu.be/YCJpS0kCbQ0the PC's native MOBO sound card was set to 192Khz to enable direct 88Khz CW TRANSMIT from the AD5DZ CW KEYBOARD sending a text file

the LF RF 88Khz output of the PC's sound card goes to the input of the LOXJIE A10…

brief experiment to see if by using the maximum sample rate of a sound card, 192Khz, would allow sending QRQ CW at 96 Khz(the highest frequency possible at 192Khz sample rate) at 96 wpm

Gstreamer scripts are used by the TRANSMITTER and RECEIVER

- TCP CW LF RF over IP -

TRANSMITTER:

****************

gst-launch-1.0 -v…

1. send AFCW MODE

2. use this GSTREAMER BANDPASS FILTER between your CW KEYER's audio output and the RIG's LINE INPUT

**********************************************************************

gst-launch-1.0 jackaudiosrc ! queue ! audioconvert ! audiowsincband mode=band-pass lower-frequency=600 upper-frequency=800 length=700…