FM 2 Op Drum V1.2.audulus (35.7 KB)
FM 2 Op Drum
This module was made as a one-off for a song I was working on, but has stuck around and proven to be very handy. The time is right to give it a few tweaks and post it for general consumption.
I have added feedback and removed ring modulation for the simple reason that ring mod made the sound quieter and feedback brings the noise!
FM 2 Op Drum IDM Demo.audulus (563.7 KB)
I/O
| Input | Signal Range | Notes |
|---|---|---|
| 1/oct | -5 to 5 |
This allows for pitched drum sequences or you can use this as a gritty bassline synth |
| trig | 0-1 |
Trig input does not respond to gate length. |
Controls
| Knob | Function | Notes |
|---|---|---|
Modulator Frequency |
Set the frequency of modulating operator. | |
| Modulator envelope decay length | The shorter the pluckier. | |
| Modulator waveform | Saw and square add a little aliasing but it sound percussive. | |
| Modulator envelope decay curve | Log will prolong the modulation effect and exponential will make it more plucky. | |
| FM intensity | How much FM do you want? | |
| Feedback | Final output is fed back into the FM input of both operators as this parameter is increased. | |
| Low Pass Gate Envelope Decay | The output is filtered to remove upper harmonics from long decays. | |
| Low Pass Gate Envelope Curve | The pluckiness of the sound increases as this parameter is raised. | |
| Carrier Frequency | Set the base frequency of the carrier oscillator. | |
| Carrier Pitch Envelope Decay Time | Name says it all. | |
| Carrier Pitch Envelope Intensity and Polarity | The pitch envelope can be inverter for some nice disco tom action. | |
| Carrier Pitch Envelope Curve | This was included for fine tuning the inflection of the pitch envelope. | |
