Typical workflow
Open the database, search for an entry, select it, load the frequencies into tone rows, press Start, then adjust levels, timer and display settings.
Search • Generate • Analyse • Build
Fields, frequencies & light.
What is actually being delivered?
RF carrier modulation, pulsed electromagnetic fields, Tumor Treating Fields and red / near-infrared photobiomodulation can all be described using “frequency” — but they are physically different technologies. This page separates the waveform from the carrier, the electric field from the magnetic field, and electromagnetic radiation from near-field induction.
RF / carrier modulation
Signal riding on RF
A high-frequency carrier can be amplitude-modulated by a lower-frequency waveform.
PEMF
Changing magnetic field
Current pulses in a coil generate magnetic flux and induce electric fields in conductive tissue.
TTFields
Alternating electric field
Electrode arrays apply low-intensity, intermediate-frequency electric fields to a tumour region.
Red / near-IR
Photons into tissue
LEDs or lasers deliver red and near-infrared optical energy rather than an applied electrical field.
Visual overview
RF carrier modulation vs PEMF — at a glance
Start with the diagram, then use the detailed sections below for the underlying physics, measurement points and the differences between RF, PEMF, Tumor Treating Fields and red / near-infrared light.
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I want to understand carrier modulationCarrier, modulation, AM sidebands, RF amplifier and applicator.
I want to understand coils / PEMFMagnetic flux, induced electric fields, pulse shape and field strength.
I want to understand TTFieldsAlternating electric fields, transducer arrays and how this differs from Rife/PEMF.
I want to understand red / NIRWavelength, irradiance, fluence, optical penetration and photobiomodulation.
01 / RF carrier modulation
RF carrier + lower-frequency modulation
In an RF “Rife-style” signal chain, the important distinction is between the carrier frequency and the modulating frequency. The carrier is the rapid RF oscillation; the slower waveform changes its amplitude, phase or frequency.
01
Amplitude modulation example
One waveform controls another
AM: s(t) = Ac[1 + m·x(t)] cos(2πfct)
For a single sinusoidal modulating tone, conventional AM creates energy at the carrier and at sidebands approximately fc ± fm. On a spectrum analyser you therefore look for the carrier plus symmetric sidebands, not for a mysterious “new” frequency.
Signal chain
Typical RF architecture
1. Frequency / waveform source
Audio-frequency DDS or digital generator creates sine, square, triangle, pulse or arbitrary waveform.
2. RF carrier oscillator
A second DDS / oscillator generates the carrier in the kHz–MHz region or above, depending on the system.
3. Modulator / mixer
Amplitude, phase or frequency of the carrier is altered by the lower-frequency signal.
4. RF power stage + matching
An amplifier and matching network raise power and present a suitable load.
5. Applicator
Antenna, plasma tube, electrode arrangement or other load converts the electrical signal into an electromagnetic field / current distribution.
Key point: “Rife frequency” is not a distinct physical category of electromagnetic field. Technically, the hardware is a frequency generator / RF delivery system. Claims that particular frequencies selectively destroy pathogens or cancers are separate claims that require clinical evidence.
Primary variableCarrier + modulation
Measured withScope / spectrum analyser
Field typeRF E + H fields
02 / PEMF
Pulsed electromagnetic field systems
PEMF equipment drives current through a coil. The coil produces a changing magnetic field; because the magnetic flux changes with time, it can induce electric fields and currents in conductive material nearby.
02
Near-field magnetic coupling
Current → magnetic flux → induced electric field
Faraday: ∮E·dl = − dΦB/dt | Coil field ≈ proportional to N·I
A faster change in coil current generally produces a larger induced electric field. That is why pulse rise time, dB/dt, peak field strength, coil geometry, distance and duty cycle can matter as much as the nominal pulse repetition frequency.
What to measure
PEMF is more than “X Hz”
Two devices both labelled “10 Hz” can produce very different exposure because the waveform may contain different pulse widths, amplitudes and harmonic content.
Pulse repetitionHow often pulses repeat
Peak B fieldµT / mT / T
Rise / fall timeControls dB/dt
Pulse widthEnergy + spectrum
Coil geometryField distribution
DistanceCoupling falls with geometry
Established device category
Prescription non-invasive bone-growth stimulators are a real regulated medical-device category. FDA records include pulsed electromagnetic bone-growth stimulators used as an adjunct in specific fracture or fusion situations. That regulatory status does not automatically validate unrelated wellness or disease-treatment claims made for other PEMF products.
Magnetic near fieldInduced E-fieldCoil-dependentPulse spectrum
03 / Tumor Treating Fields
TTFields: deliberately applied alternating electric fields
Tumor Treating Fields (TTFields) are not simply “PEMF for cancer” and they are not RF carrier modulation. They use arrays placed on the skin to produce low-intensity alternating electric fields at tumour-specific intermediate frequencies, generally in the hundreds-of-kilohertz range.
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Field delivery
Electric field between transducer arrays
Field orientation is periodically switched between array pairs so dividing cells experience fields from more than one direction. Commercial systems use treatment planning to choose array placement.
FieldAlternating electric
Frequency regionHundreds of kHz
DeliverySkin arrays
Biophysical concept
Why dividing cells are a target
Published TTFields research describes disruption of processes involved in mitosis. Alternating fields can exert forces and torques on polar or charged cellular structures; non-uniform fields can also create dielectrophoretic effects during cell division. The exact cellular response is more complex than a single “resonant frequency” explanation.
Clinical distinction
TTFields have undergone randomized clinical testing and have FDA-cleared / approved indications through specific prescription systems. Current U.S. records include glioblastoma, malignant pleural mesothelioma, and metastatic non-small-cell lung cancer in defined treatment settings.
Critical difference from “Rife” claims: TTFields are defined by a controlled field strength, frequency, array geometry, treatment duration and a specific clinical indication. They are not evidence that arbitrary frequency lists have equivalent anticancer effects.
Prescription systemArray planningIntermediate frequencyClinical trials
04 / Red + near-infrared
Photobiomodulation: optical energy, not an applied RF field
Red and near-infrared (NIR) therapy uses photons from LEDs or lasers. The useful engineering variables are wavelength, irradiance, fluence, beam geometry, duty cycle, distance and tissue optical properties.
04
Optical delivery
LED / laser → photons → absorption + scattering
Fluence (J/cm²) = Irradiance (W/cm²) × Exposure time (s)
Red light is often used for more superficial targets; longer near-infrared wavelengths generally penetrate farther before being attenuated, although “penetration depth” is not a single fixed number and depends strongly on tissue and wavelength.
Photobiology
What photobiomodulation research proposes
Photobiomodulation studies commonly use red / NIR light in roughly the 600–1100 nm region. A widely studied mechanism involves photon absorption by mitochondrial chromophores, including cytochrome-c oxidase, followed by changes in cellular signalling, redox state and energy metabolism. Mechanisms remain an active research area.
Dose is not “more is always better”
PBM often shows biphasic dose behaviour: insufficient exposure may do little, while excessively high irradiance or fluence can reduce the desired photobiological response or simply become thermal exposure. Wavelength and delivered dose should therefore be stated together.
Wavelengthnm
IrradiancemW/cm²
FluenceJ/cm²
Exposureseconds / minutes
PhotonsLED / laserOptical absorptionNon-ionising
Side-by-side
Same word — “frequency” — different physics
The most useful first question is not “what frequency?” but what physical quantity is oscillating, and how is it coupled into the body or load?
| Property | RF carrier modulation / “Rife-style” | PEMF | TTFields | Red / near-IR PBM |
|---|---|---|---|---|
| What oscillates? | Voltage/current at an RF carrier; envelope / phase / frequency may be modulated | Coil current and magnetic flux | Electric-field polarity and magnitude | Electromagnetic optical field; delivered as photons |
| Typical coupling | Antenna, plasma tube, electrodes or other RF load | Inductive / magnetic near-field coupling | Capacitive / conductive coupling via skin-mounted arrays | Optical absorption and scattering in tissue |
| Main engineering units | Hz, V, W, modulation depth, spectrum, impedance, SWR | Hz, T / mT / µT, dB/dt, pulse width, duty cycle | kHz, V/cm, array geometry, duty / treatment time | nm, mW/cm², J/cm², beam area, pulse duty |
| Carrier required? | Often yes in RF-modulated designs | No separate RF carrier required | No “carrier + audio tone” architecture required | No RF carrier |
| Field local or radiated? | Can include radiated RF and near fields depending on applicator | Usually near-field / local coil region | Local electric field through target region | Light propagates into tissue and attenuates with depth |
| Clinically established uses? | Specific “Rife cure” claims are not clinically established | Yes, for certain regulated device indications such as specified bone-growth stimulation | Yes, specific prescription TTFields indications | Evidence and cleared indications vary strongly by condition/device |
| Can one be inferred from another? | No. A clinical result for TTFields, PEMF or PBM does not validate an unrelated frequency generator, and a shared numerical frequency does not make two exposures equivalent. | |||
Measurement
How you would verify each system
RF
Oscilloscope + spectrum
Check carrier frequency, modulation depth, waveform, harmonics, sidebands, amplifier compression and load matching. RF probes, dummy loads, directional couplers and field probes may be needed.
PEMF
Pickup coil + calibrated probe
Measure pulse waveform, peak field, spatial distribution and dB/dt. A scope trace alone does not determine field strength unless the sensor transfer function is known.
TTFields / PBM
Field / optical dosimetry
TTFields require electric-field modelling and controlled array placement. PBM requires optical power / irradiance measurement and known wavelength, area and exposure time.
Evidence map
Keep physics, device approval and treatment claims separate
Established physics
RF modulation
Mixing, modulation, carriers and sidebands are standard RF engineering.
Established physics
PEMF induction
Changing magnetic flux induces electric fields according to Maxwell–Faraday electromagnetism.
Clinical device evidence
TTFields
Specific systems have clinical-trial evidence and regulated oncology indications.
Condition-dependent evidence
Photobiomodulation
Evidence varies by wavelength, dose, device and clinical endpoint; it cannot be generalised to every condition.
KM Frequency Lab manual
Use the site from search → signal → analysis
The Help & Setup page is merged here so this single file works as both the field-technology explainer and the practical KM Frequency Lab user manual.
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1. SearchDatabase or imported list
2. LoadPut frequencies into tone rows
3. GenerateStart tones / sweep / timer
4. AnalyseScope, FFT and waterfall
5. Export / BuildSave lists or use DIY tools
Showing all guide cards
Start
Getting started
Use the site as a clean workflow: search a frequency entry, load or type tones, run the generator, then use the analyser views to see what is being produced.
Browser audio
Most browsers only allow sound after a click or tap. Press Start from the page itself and keep the tab active if mobile power saving stops audio.
Navigation
The top menu links to the database, generator, signal lab, tools, DIY hardware guide, help and downloads. On small screens press Menu first.
Database
Frequency Database
The database is the library area for searching built-in and custom frequency sets.
Searching
Type a condition name, keyword or number into the search box. The list updates to show matching entries from the built-in library and any custom entries saved in the browser.
Loading entries
Select an entry to see its frequencies, then load it into the generator. Multi-frequency entries can fill several tone rows at once.
CSV imports
Use CSV import for your own lists. Keep rows simple: name plus one or more frequency values. After import, check the row names and frequency numbers before running them.
Custom library
Saved entries are stored in the browser. Export a backup before clearing browser data or moving to another device.
Generator
Live Generator
The generator creates browser audio tones and lets you combine up to eight frequency rows.
Tone rows
Each tone row has a frequency box and level control. Add rows for multiple simultaneous frequencies, or remove rows to simplify the output.
Level control
Use lower levels when running several tones together. Multiple full-level tones can clip or sound distorted.
Mute and Solo
Mute disables one row without deleting it. Solo lets you hear one row while leaving the other rows ready to restore.
Timer and sweep
The timer stops a session automatically. Sweep mode moves through a frequency range instead of holding one fixed tone.
Signal Lab
Waveform, FFT and waterfall
The signal views show the browser audio output visually.
Coloured traces
Each active tone can be drawn as its own coloured trace so you can see separate frequency components.
Combined waveform
The white trace shows the final mixed waveform that results from all active tones added together.
FFT spectrum
The FFT view shows frequency peaks. Stronger tones appear as taller peaks at their approximate frequency positions.
Waterfall
The waterfall shows changes over time. It is useful for sweeps because you can see the signal moving through the spectrum.
Zoom and smoothing
Scope zoom changes the vertical waveform scale. Smoothing calms the FFT display so peaks are easier to read.
Tools
Extra tools
The Tools section links to the converter and audio studio.
Spooky2 Converter
Use this when you have a screenshot, photo or pasted text list and want to turn it into editable frequency rows for export.
Open converter help →Therapeutic Audio Studio
Use this when you want to build relaxation or focus audio using music, tones, chords, scales and layered sound settings.
Open audio studio help →DIY
DIY Hardware
The DIY section explains how the website can feed safe audio or control signals into external projects.
Start with blocks
Think in stages: signal source, level control, isolation, driver, amplifier, output load and safety enclosure.
Use isolation
Do not connect high-voltage or RF circuits directly to a laptop, phone or USB device. Use proper isolation and test at low power first.
Full guide
The separate DIY page explains ESP32, AD9833, PWM, Bluetooth, amplifiers, plasma tubes, coils, RF and antennas in more detail.
Open DIY Hardware Guide →Downloads
Downloads
The downloads page is for packaged app builds, browser files, CSV lists and microcontroller resources.
Web upload
For hosting, upload the files so index.html is directly in public_html or htdocs. Do not leave the site inside a nested folder unless you intend that folder URL.
Desktop builds
Download the correct ZIP, extract it, then run the app file. Unsigned builds may need approval from Windows or macOS on first launch.
CSV and sketches
CSV files provide frequency library data. ESP32 sketches are for hardware projects and need checking against your exact board pins.
FAQ
Troubleshooting
Common problems and fixes.
No sound
Click Start again, check the device volume, unmute the browser tab and make sure the output device is correct.
Waveform not moving
Start audio first. Some browsers pause animation or audio when the tab is hidden or the device enters power saving mode.
CSV import fails
Check for strange characters, missing commas, empty frequency cells or text mixed into frequency columns.
403 on hosting
Make sure index.html is in the hosting root and file permissions allow public reading.
Large Library Search
10k–40k+ program support.
The database search is designed to stay fast even when very large Rife-style lists are added.
Indexed search
When the library loads, the site builds a compact search index from each entry name, frequency list, source, category and tags. Searches use that index instead of repeatedly scanning the page.
Limited rendering
The browser does not draw every matching result at once. It shows the first results and asks the user to refine the search, which keeps the page responsive with large datasets.
Source-ready records
Frequency entries can include source, category and tags. This makes it possible to merge CAFL-style, ETDFL-style, Spooky-style or custom lists while still filtering them cleanly.
Best practice
For very large imports, keep names short, keep frequency values numeric and use source tags so duplicate or conflicting programs can still be identified.
How large libraries work
The site builds a fast search index from program names, source labels, categories, tags and frequency values. Results are capped on screen so the browser stays responsive.
Supported program fields
Each entry can use name , channels , source , category and tags . Older entries with freq or ch1/ch2 fields are also normalised.
Source filtering
Use the source filter beside the search box to search one database at a time, such as CAFL, AFCAFL, ETDFL, HC, VEGA or a custom imported set.
Adding more files
Extra database files can be merged into frequencies.js or added as window.frequencyDatabases JavaScript files loaded before app.js .
No guide cards match that search. Try a shorter word such as “CSV”, “audio”, “FFT”, “DIY” or “database”.