ModIV Mod/Demod modules

In telecommunications, modulation and demodulation is used for the transmission of signals. Modulation in radio communications means varying one signal in relation to another, using a high-frequency sinus wave as a carrier wave to convey the actual signals which have to be sent. After the process of modulating, another device has to de-modulate the signal again. Without this technique, radio stations would have to use huge antennas for the (comparatively) low frequency signals to be sent; besides that, without encoding, just one radio transmitter could be heard at a time.
Amplitude  modulation (AM) and frequency modulation (FM) are well-known methods for modulating/demodulating signals.

dspLoad 9.20/5.80/5.90
mp3 with var. settings for A and R.

dspLoad 29.50/26.30/26.20
freq control range for Carrier, Filter, and Center freq is 0-20kHz.
mp3: various Carrier, Filter + Center freq tweaks

dspLoad 14.10/10.90/10.90
wave A+B: sin, tri, sawUp, sawDn, squ
range frqA and B: 0-20kHz
extM and extD: ext sound processing modules can be connected here (out->ext module, ext module->in; press resp. button to hear the effect)
mp3: DrLp, generous tweaking of all parameters

AM Mod/Demod module (Att=1) with sine input; various zoom levels. above:dry, below: fx