The Crossfold is a new concept wavefolder: A high quality, compact, 8-stage, dual voltage-controlled crossfader, analog wavefolder/waveshaper from Antimatter Audio capable of producing subltle to extreme distortion, folding, and experimental synthesis.
Voltage controlled balance of two audio sources before processing through the high fidelity 8 stage wavefolder creates "crossfolds", unexpected and complex interactions of sound that can resemble through-zero FM synthesis, bizarre distortion, and even more mysterious results.
As lovers of wave shapers, we refined the Crossfold to produce timbres and patches that we were always seeking, patches that were either not possible, or required many more modules to accomplish before the Crossfold.
The Crossfold utilizes high quality op amps, multiple high quality VCA chips, and a small army of resistors and diodes to create a unique, hi fidelity wavefolder capable of producing sounds yet unheard of!
The fold and range controls with voltage control provide the main intensity level, with the range control setting the scope of the fold control, traveling from single folds, up to eight, further into clipping, which compresses and offsets the folds both into the positive and negative range. A built in output limiter allows you to explore clipping effects without large volume spikes, while still allowing for a musical dynamic range.
The output stage has 3 modes selectable by a switch on the front panel: a voltage-controlled dry/wet of the input crossfader (great for balancing fundamental tones Vs added harmonics), wet vs. input 1 (great for mixing signals for the wet signal while maintaining a single dry signal), or as a final VCA to complete a voice or provide amplitude modulation of the output.
The Crossfold is capable of combining sources to produce low punchy basses, glassy marimbas, screaming synced leads, morphing alien drones, and much more. It even sounds amazing on bass guitar, thanks to its smooth distortion capabilities!
Antimatter Audio modules are proudly designed and assembled in Portland, OR, USA.
• 8 stage wavefolder
• High quality signal path
• Generates smooth to extreme distortion, folding, and experimental synthesis
• Dual integrated voltage controlled crossfaders
• Triple mode output stage with integrated limiter
• Create a complex oscillator by combining and experimenting with your existing oscillators
• Generate unexpected "CrossFolds" by combining various sources
• Reverse power protection
There are 3 amp stages before the wave folder that can effect the sound. If you are only using one input, make sure that the Fade control is set to that input. Fold can go completely silent when turned off. Both Fold and Range can go silent when receiving negative voltage, such as the negative part of a bipolar LFO. (Using an attenuator can help in this case)
Wavefolders prefer smooth shapes (like sine waves), the Crossfold works best with two smooth sources. An easy way to get a sine wave is to use a filter as an oscillator by turning its resonance all the way up (if the filter self resonates). Of course, you don't have to use sine waves. The Crossfold will even apply shaping to square waves! A good way to smooth out signals is to use a filter before the crossfade. Drums with lower harmonic content, such as 808 kicks are also great. You can mix any sources and the Crossfold will modulate them in various ways, but these are good places to start!
There are tiny trim pots on the back of the Crossfold for each amp stage. Adjust them very carefully as to not damage your Crossfold. This document provides a guide for calibratrion: https://drive.google.com/open?id=1GHSOIDDA6dmv-uab4FFXA7cOgptPfx6P (Please note that the crossfaders may not be completely silent on each side, but can be adjusted to a good level)
The Crossfold was specially engineered to not filter the sound going in, and wavefolders clip and amplify their inputs by nature. Thus, and defect in a waveform may be amplified. For reference, try a clean sine input, then try filtering your content before entering the Crossfold. Additonally, the hard edges of waves such as a sawtooth will pass through a folder at full volume, while the folds created by the slope of the wave may be at a lower amplitude. Filtering the input can change this balance.
We calibrated the dry/wet levels to work well with many signals, but the effect of the wavefolder on amplitude can vary from source to source. The amplitude (and perceived amplitude) of signals can depend upon their harmonic content, the amount of folding, the fader setting, etc... Some times this can alter the bias of the output of each side.
Partially, in order to reduce noise and artifacts, we did put some SDC blocking in the CF. It will happily warp and mix LFOs, envelopes, etc.. , but they will be at a reduced amplitude the slower they are.