Erica Synths Black Octasource Manual PDF
The Erica Synths Black Octasource is a versatile and powerful modulation source with eight outputs, morphable waveforms, extensive CV control, and clock sync—making it suitable not just for creating evolving sounds, but also for building structure, movement, and “song” within a modular system.
Many modular users find it easy to patch a cool groove, bassline, or sequence. But making the patch evolve, change, or build into something with an “arrangement” (verse, chorus, breakdown, etc.) is where things get tricky.
With the Octasource, you have a sophisticated modulation brain that can:
Below are methods and patch ideas for using the Octasource as a tool for arrangement and full song performance, in combination with other modules.
The eight phase-shifted outs can be patched to different parameters across your system:
When you sync or slowly morph the LFO rate (or waveform shape), you’ll get coordinated, timed changes across the patch. Move from one “section” to another by manually or CV-modulating the rate, or attenuate outputs to create bigger shifts.
Set the Octasource to Multi mode so all outputs have all waves, but waveform selection is offset. Slowly modulate the waveform select with CV (perhaps from a random source, sample & hold, or manual joystick), and the entire patch will shift its modulation flavor over time.
Use the external clock sync to tie Octasource LFO cycles to your master clock (from a sequencer or clock divider/multiplier). You can now:
Manually freeze to “pause the action,” then unfreeze for movement to resume—perfect for big drops or breakdowns.
In Single mode, the eight outs are the same waveform but phase shifted by 45° each. Send these to multiple melodies, rhythm triggers, or effect parameters—this creates evolving, Steve Reich-style phase relationships, predicting new phrases and automated change.
E.g., - Four outs to four drum triggers/gates—watch patterns phase and spiral over time - Eight outs to eight steps of a sequencer’s pitch CV input—slowly shifting melodies
Assign the Rate or Wave knob to a CV controlled macro source (manual fader, expression pedal, automation from a sequencer, etc). Perform your “song structure” live by sweeping one control: fade into new sections, change character, or freeze for drama.
Patch different outputs through voltage controlled switches or sequential switches to mute/unmute voices, send parts to different FX chains, or fade elements in and out automatically.
Combining these techniques, you can create patches with self-evolving arrangements, macro performance controls, and dynamic change—just like composing a song with intros, verses, choruses, and outros, but produced through voltage and phase relationships rather than a linear DAW timeline.
The Black Octasource is not just an LFO—it’s a powerful tool for automated, performable modular arrangements. When you use its sync, phase, morphing, and freeze features creatively, it can turn a static loop into an expressive, full-length composition.