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FM AID | 2020 VERSION | USER GUIDE
FM AID
Through-zero linear FM
FM AID is a module designed
to perform Through-Zero Linear
Frequency Modulation (FM)
in the analog modular world.
Use any signal as a
Carrier or Modulator.
Width: 4HP
Depth: 30mm (3cm, or 1.5 inches)
Power Consumption: +45 /-45 mA at +/-12 Vdc
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Table of Contents
Summary of Contents for Happy Nerding FM AID
- Page 1 FM AID | 2020 VERSION | USER GUIDE FM AID Through-zero linear FM FM AID is a module designed to perform Through-Zero Linear Frequency Modulation (FM) in the analog modular world. Use any signal as a Carrier or Modulator. Width: 4HP Depth: 30mm (3cm, or 1.5 inches)
- Page 2 SPECIFICATIONS Inputs & Outputs Carrier Input Level: -5V … +5V Note: FM AID also accepts inputs from -1V … +1V to -12V … +12V using an onboard trimmer. Modulator Input Level: Preferably -5V … + 5V CV Input Level: Preferably -5V … + 5V Outputs Level: -5V …...
- Page 3 FM oscillators are mainly based on a ramp waveform, which is then shaped to other waveforms. This is also represented in the FM AID module: a sawtooth signal is expected on the Carrier input to give the indicated sine, triangle, sawtooth and square waveforms on the respective outputs.
- Page 4 FM AID | 2020 VERSION | USER GUIDE CONTROLS FM Knob Sets Frequency Modulation depth, or as it usually called in FM synthesis: modulation index. By increasing the “FM” amount, additional harmonics are shifted proportionally further from the main tone. This increases the sonically perceived brightness and complexity of the sound.
- Page 5 FM AID | 2020 VERSION | USER GUIDE OUPUTS SQUARE Very bright output. Using a saw wave as the Carrier input will result in a square wave. SAWTOOTH Very bright output. Using a saw wave as the Carrier input will result in the same saw wave.
- Page 6 Of course there is no such restriction for analog Pitch CV can be used to vary the FM depth (index) implementation of FM AID module. But there is still amount for different pitches: limited reset time of standard analog waveforms, so it •...
- Page 7 By default FM AID is tuned to be fed with -5V … + 5V (10 V pk-pk) signals for Carrier. But as all oscillators are not perfectly made to give exactly -5V … + 5V waveforms, you may have to adjust the trimmer to the setting which gives the least amount of artifacts.
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