All Blog Posts Tagged 'QRQcw' (144)

Python QRQ CW Radio Station Receiver - modified from this python script: https://github.com/irsbugs/GStreaming/blob/master/radio_gui.py

sending CW text files on continuous repeat using unixCW's CW program…

https://github.com/gordonjcp/lysdr demo of using LYSDR to demod 3 VLF frequencies at the same time using multiple instances of LYSDR and combing their demod'D audio outputs…

demo of setting up a pi4 to act as an RTSP virtual ham radio ionosphere SERVER that many OPs can connect to for QSO'n or just listening... this setup uses an i/q input above and below ZERO POINT by about 80 Khz worth of RF SPECTRUM - to gather together and QSO uses the gSTREAMER wavpack codec, and a gstreamer…

REMOTE AUDIO over ip by PYTHON/gstreamer/ pi2b TCP SERVER and pi4 TCP CLIENT to SEND transmit AFCW TO RIG and receive audio from RIG on the REMOTE

OPs pi4 station pi2b is using ALSA in the PYTHON SCRIPT AFCW KEYING SETUP - uses the RECRI KEYER cw and sdr apps…

CARLA on this raspberry pi 4 is using the ALSA AUDIO ENGINE, with a USB SOUND CARD(Behringer UCA222) 48Khz sample rate, 3 periods of 64 buffer frames - for lowest possible latency for this operation https://kx.studio/Applications:Carla

CARLA is using 1 lv2…

TEST sending CW MiDi over iP using Gstreamer from 20 wpm to over 100 wpm

create a single SINE WAVE or a single CW AUDIO NOTE using Audacity save as a WAVE FILE...

import into Polyphone Soundfont Editer…

http://jack-rack.sourceforge.net/

GLAME BANDPASS FILTER   http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html

iCW/mumble   https://sites.google.com/site/icwoip/

Carla Plugin HOST …

Brief Demo for sending QRQ CW over SONOBUS using KXstudio's Carla in "multiple clients" mode on a Raspberry Pi 4 SonoBus is also monitoring its input to be able to monitor the REGEN'd ZamGate CW sidetone in real time at near zero latency

a TLC555 is being keyed by FLdigi's serial port rts pin, TLC555 sending its audio…

testing using 2 ferrite bobbin core inductor coils inside thick pyrex glass measuring cups to provide high voltage isolation protection between a RIG/cw keyer and a PC soundcard's input

used for sending CW AUDIO over SonoBus by keying a TWIN-T oscillator

the output of the TWIN-T goes to a class D amp…

- a Pi4 has a usb sound card with LINE INPUT/line output/headphone output

- fldigi is keying a 555 square wave oscillator(by connecting pin 4 of the 555 to its POS RAIL through an H11F1 OPTOisolator chip) using FLdigi's KEY BY SERIAL PORT RTS PIN feature and sends its audio output to the pi's usb sound card's line…

Mixxx is a VARIABLE SPEED audio player that works great to slow down or speed up a QRQ CW audio file. Mixxx also has a REVIEW/rewind function that allows you to repeat the last word sent as many times as you want(by hitting the keyboard letter 'A' ...you can also repeat while slowing it down... MIXXX will change the cw frequency however....…

https://streammyaudio.com/live

ARCHIVED whole stream is located here: CRSnet.mp3 (Jul 12, 2022 11:44:49 UTC)

https://streammyaudio.com/archive

a CW…

SETUP: a TWIN-T oscillator is being keyed by FLdigi's RTS SERIAL PORT feature...

the TWIN-T has noise and harmonics

use SONOBUS's native input FX DSP apps, NOISE GATE & PARAMETRIC EQ to STOP THE NOISE and CLEAN UP THE twin-t's SIDETONE before transmitting it to the other OPs listening on your…

https://kx.studio/News/?action=view&url=cardinal-2206-released

https://github.com/DISTRHO/Cardinal…

https://sonobus.net/

the PI2B, still has enough 'power' to function as a REMOTE RIG OPERATIONs interface FLrig(from the pi2b's installed apps) is used to control many functions of the K3S

using ssh -X the PI2b's FLrig GUI appears on the remote laptop's…

zamgate is a used as a 'GATE', to help balance and equalize the RISE/FALL time of the original CW NOTE passing through it

https://www.zamaudio.com/

a BANDPASS FILTER, finishes the job by cleaning up and reducing the unwanted/unpleasant Morse Code audio…

brief demo of keying a TWIN-T sine wave oscillator and sending the CW AUDIO TONE output from the TWIN-T to the MIC INPUT of an iPHONE LIGHTNING to HEADSET (Mic & Headphone) adapter…

Build your own 'MIDI' "keyable" Morse Code Practice Oscillator

using the free CARDINAL MODULAR SYNTHESIZER

https://kx.studio/News/?action=view&url=cardinal-2202-is-now-released…

GATE plugin used in this demo if from CALF STUDIO PLUGINS

https://calf-studio-gear.org/