All Blog Posts Tagged 'code practice oscillator' (13)

using a modified PYTHON SCRIPT from: https://brettviren.github.io/pygst-tutorial-org/pygst-tutorial.htm

GSTREAMER python code used in this PYTHON SCRIPT example:

# Set up the gstreamer pipeline self.player =…

Near Zero Latency passthrough... using this Gstreamer Script to create a custom CW AUDIO bandpass filter: (CW PITCH of CPO = @700 hertz)

gst-launch-1.0 -v jackaudiosrc ! audiowsincband mode=band-pass lower-frequency=580 upper-frequency=820 length=384 window=3 low-latency=true ! jackaudiosink sync=false…

built this TWIN -T - long time ago with the idea to be able to adjust the RISE and Fall TIME individual(via steering diodes) using the 3 variable resistor POTs for pitch, symmetry & rise/fall time circuit also uses a 5V regulator to stabilize the pitch and a 10K output resistor before going to audio input of…

brief demo of using a parallel resonant LC circuit resonant at the CW PITCH for the HD-1416 output and then a series resonant LC circuit that is connected to the SPEAKER

both FERRITE BOBBIN CORE INDUCTOR COILS are 1.8mH

INGEN uses JACK MIDI for its MIDI input(&output) which provides precise timing for the CW elements(NOTE: alsa midi does not provide precise timing as such) This demo uses INGEN which can use all your installed LV2 plugins to create a patch bay array of all kinds of plugins, where, once you are happy with your design, you can save it ALL…

brief demo of selecting various raised cosine windows for copying qrq cw using the AD5DZ CPO, being keyed by the AD5DZ CW Keyboard....NOTE: ...might not hear much difference unless using a good set of headphones...the changes are subtle between all the raised cosine windows options....…

short demo of using the free open source modular synthesizer program - VCV RACK - to build your own software "keyable" Morse Code Practice Oscillator

the plugins shown used, are some of the basic default plugins that install with the VCV RACK program....the Morse Code CPO setup uses a typical basic framework to make a midi keyed…

This is a QRQ CW COPY TEST - to see how close I could match the great sound of FLdigi's QRQ CW with a custom cw sine wave oscillator - built up by using AMsynth and the GLAME BANDPASS FILTER...NOTE: since you can not externally KEY FLdigi... i had to search for another way to be able to key CW manually/externally - from PADDLES, KEYBOARD or…

SETUP: an UltraPico Keyer, keys a 555 TIMER CHIP..from the audio output of the 555, an audio cable is attached and goes to the input of a laptop's mic jack input...the 555 time chip sidetone is very rough sounding with lots of high pitched harmonics and key clicks...INSTEAD of trying to filter the 555's raspy tone, this video demo's using TRIGGER…

The Raspberry Pi is first setup as a code practice oscillator using LINUX NATIVE REAPER and its own plugins. Then using a circuit similar to this: http://i.imgur.com/C2qYIPm.png , a 555 timer chip is keyed by a FET optoisolator that connects to a CW KEYER's key-RIG OUTPUT jack. In this video a…

Reaper, already installs with all the plugins you will need to create a customized and high quality sounding morse code practice oscillator.  Here is a short video showing the plugins in action.

(REAPER is available for all operating systems)  Here is a short video with an overview of this:

Reaper, has everything you need to make your…

Every computer MICROPHONE INPUT jack,  has its own voltage and current that is already built inside it, in order to power Electret Mics.  By modifying a very simple and low voltage square wave generator circuit to make use of this MIC VOLTAGE, a very simple and NO BATTERY NEEDED -  EVER -   code practice oscillator can be made using this circuit, the MIC JACK,  and  an AUDIO to MIDI technique to regenerate the original input…

This is an experiment in using free VST PLUGINS to create a MIDI KEYED morse code sine wave oscillator(software). It is "keyed" by MIDI INPUT. You can also use this midi setup to regenerate morse code audio tones from another source. FLdigi is used in the video for this purpose. Using MIDI to key a software CPO, shows great promise, since the accuracy of midi input keying is far superior to using a SERIAL PORT for this kind of a setup, in regards to accurate timing. Even at extreme QRQ CW…