If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #76
Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458
Ok, while this is still a project thread about a modulator project ive started a while ago, i need some help and some suggestions.
this is not a fun project anymore and im getting into trouble everytime i think about it. cause i know that some people make a real secret about their musical modulators i dont think that there will be much attention spent to this thread. but its worth a try
the situation is as followed-
i have the job, to build a circuit that provides a musical modulation of a drsstc via a normal cd player and normal music with ht efull bandwith of the audible range. the goal for this circuit is to split and cut of the audible frequencys and modulate an entire frequency range within the audible range. an active band pass filter is used to determine the frequency being modulated. adjustable is resonance and frequency of the aktive band pass control. a pwm modulator is fed with the resulting signal. an envelope detector forms a curve to trigger a square up circuit. the slope detector and the added logic should be able to determine the lenght of a note being played to interrupt the squared up frequency. after that, everything is fed into a normal modulator, forming the on time pulses for the drsstc. the toslink is optional.
so what do you guys think about this rather complicated modulator? For sure, its not possible to modulate the whole range of an audible signal from a cd player, but my attempt is, to modulate a part of the bandwith (maybe 100hz-1khz or a little more) to get melody and maybe vocals into squared up signals for a drsstc. ive already build and tested some of the modules and while the whole circuit isnt finished yet, it is possible only with the slope detector an active bandpass and a square up circuit, to modulate analog stand alone signals to drsstc duty signals. such as keyboard, speech and many other solo signals. it is possible to extract the baseline of a full audible range signal too.
What do you think? Will or can the finished circuit do what i want, without sounding horrible?
the attachement shows a block circuit of the modulator
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
honestly, it seems like you would have a lot more luck either doing the work in some type of DSP, or doing it on a computer and burning tracks that have an output that you can feed strait into the modulator.
It just seems way to complicated to try to make this work.... But if you can pull it off all the more power too ya!
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Hey Reaching,
Finn gave me permission to publish the circuit I used for the Tesla Guitar stuff. I'm real busy with work just now, but I'll be doing it as soon as I get the chance. It works pretty much the same as Dan's Xenosonic thing, but the circuit is simpler. Mostly because I left all the safety features out!
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
Your idea of using a bandpass filter is ok i guess, but musical content varies so much that its always difficult to pick out a vocal melody over a bunch of guitar noise. Its just a really tough problem, and im almost 100% certain no one building tesla coil modulators has figured out a way to do it :P.
I still like my MIDI stuff because its so extremely clean (when it works, haha) and offers more control in my opinion. MIDI didnt seem to be an option for you, so i'll just hold onto my "super secret" code for now :P. Of course, if you read up on the MIDI spec, you will find that im not doing anything special, so my stuff is only "secret" cause i didnt publish my code yet. BTW, if anyone *really* wants to see my code, they should just email me.
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Need help with an universal drsstc audio modulator
