A ring modulator is a signal processing effect that multiplies two input signals (carrier and modulator) together, producing output frequencies at the sum and difference of the input frequencies (f1+f2 and |f1-f2|). The original input frequencies are suppressed in the output. Parameters include carrier frequency, modulator depth, and input gain. The mechanism of persistence: hardware ring modulators use diode ring mixers (four diodes arranged in a ring configuration); digital implementations use sample-rate multiplication. Ring modulation produces inharmonic, bell-like, or metallic timbres and is used for voice effects (e.g., Darth Vader), bass synthesis, and experimental music. [formal: modulatio per anulum | substrate: mind | horizon: a moment | explicit: yes | epoch: 0.01]
Accepted ontology entry
ring-modulator
A ring modulator is a signal processing effect that multiplies two input signals (carrier and modulator) together, producing output frequencies at the sum and difference of the input frequencies (f1+f2 and |f1-f2|). The original input freq…
Definition
Why it is in scope
a signal processing device or algorithm that multiplies two input signals together to produce sum and difference frequencies, used as a timbral effect in music and audio synthesis
Names and aliases
- ring-modulatoren · CANONICAL
Relations from this entry
- amplitude-modulationINSTANCE_OF →
A ring modulator is a specific kind of amplitude modulation: specifically, double-sideband suppressed-carrier AM. Both multiply two signals to produce sum and difference frequencies. The ring modulator's distinguishing feature is carrier suppression, making it a narrower sense of amplitude modulation.
- amplitude-modulationDERIVED_FROM →
Ring modulation is a form of amplitude modulation where the carrier signal is suppressed and the input is multiplied by a carrier waveform. It is historically and structurally derived from amplitude modulation — specifically double-sideband suppressed-carrier (DSB-SC) modulation. The carrier frequency comes from an oscillator, and the modulation mathematically is AM without the carrier term.
- audio-effectINSTANCE_OF →
Ring modulator is a specific kind of audio effect: it intentionally alters a sound signal to produce sum/difference frequencies, which is the carve in audio-effect definition. Nearest kind per Law 11e: audio-effect sits between ring-modulator and signal-processing.
- oscillatorDEPENDS_ON →
Ring modulator multiplies a signal with a carrier. Remove the carrier oscillator and the multiplication has no carrier to operate on, so the ring modulator stops producing modulated output. Operational dependency, not historical.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Sep 6, 2026, 10:46 AM UTC
- Content hash
- 1412d9316f9c9212adc8994cdaea7ac6289cc341a3fb9e8400594fb8500be80f