In this article, I will share one of the ways to create a BEAT-BASS line on basic modules like oscillators, envelope generators, a filter, and an amplifier.
The genre was chosen by my favorite Techno, but you can apply this approach in any style. It all depends on your imagination.
So we need:
- Sequencer with at least two trigger lines. I used the rack-mount 8-speed Doepfer A-155.
- Two oscillators. In my case, this is the Pittsburgh Modular Waveforms.
- Two mixers. I have this Mutable Instruments Shades and MXDS from OIIIAUDIO.
- Filter! Of the several types of filters, OIIIAUDIO’s Diode Ladder showed the best. This is a classic diode filter with a distinctive sound.
- Amplifier. Simple dual VCA from OIIIAUDIO.
- THREE ADSR Envelope Generator (EG). In some cases, you can use AD EG. I have this Doepfer ADSR and two Pittsburgh Modular ADSR. (Further OSC EG, VCF EG and VCA EG respectively)
The modules were assembled as in the diagram:
The main line of the Gate sequencer I used to trigger the envelope, which controls the oscillators (OSC EG), I used an additional trigger line to create a rhythmic pattern, controlling the filter using a standard envelope generator (VCF EG).
When I typed the sequence of control voltages I needed on the sequencer, I mixed it with the OSC EG envelope signal and multiplied this mixture and used it to control the frequency of both oscillators. The initial frequencies of oscillators are set in the musical interval for harmonious sound.
Then, in a certain proportion, I mixed the square waves of both oscillators and sent the resulting mixture to a diode filter (VCF), which is controlled by the envelope through the rhythmic pattern of a separate trigger line of the sequencer.
The amplifier (VCA) is also controlled by its own envelope generator (ADSR EG).
The output was quite rich fat sound track with a good rhythm.
What can I add?
In general, in standard schemes, “percussionists” also use white noise, mixing into the sound in front of the filter and / or slightly controlling the filter. To be honest, this option did not come to me, but I can assume that it can be very useful in a specific other case.
Sometimes FM modulation of one oscillator by experiment with another, usually soft triangular waves, is used experimentally, but here it’s everyone’s business, for there are a lot of options …
Also very interesting and unusual sounds the scheme described above passed through a phaser (Phaser).
Well, do not forget about the lamp overload, which will add the characteristic warm rattle to the bits.
I wish you more productive experiments you and unique sound!
Thank you for attention!..