EF101D-DUAL OSCILLATOR
The EF101 is a digital circuit in which one oscillator feeds into another in series. The interplay between the 2 can create some amazing sounds.
- OPERATING INSTRUCTIONS –
Connect your amplifier to the OUTPUT jack. Please note that whenever a plug is inserted into the OUTPUT jack, the EF101 is draining current from the battery. The STATUS LED will light up when the EF101 is on. It will blink in unison with the oscillator pulse. Use the FOOT SWITCH to toggle between on and off.
The RATE control adjusts the speed of the oscillator. With the RATE knob turned fully counter clockwise, you should hear a pulsing tone which is metronome-like. Turning the RATE knob clockwise, the pulsing speed will increase, until it becomes a steady tone. Notice that the STATUS LED will blink in unison with the pulse rate. At lower rates, you will see it blink. At higher rates, it will appear as always on. This is because it’s blinking at a rate faster than your eye can perceive.
The FREQUENCY control changes the pitch of the oscillator tone. The frequency range basically covers what is perceptible to the human ear – 20 Hz to 20 kHz. In the fully counter clockwise position you will hear the lower end of the spectrum. As you turn it clockwise, the pitch will rise until only neighborhood dogs can sense the tone.
As you adjust the RATE & FREQUENCY controls for the desired tone, you will notice some unique sounds occur ring when the oscillators are oscillating at the same speed. This can only be described as a flangey, wah-like effect.
It may take a while to find the right knob positions, but trust me, it’s worth it. Enjoy!
The VOLUME knob controls overall circuit volume. Shocker.
The INPUT jack allows you to plug another instrument into the EF101 and toggle between the two. It is TRUE
BYYPASS. This may come in handy for guitar players that want to just add the EF101 to their effects chain without having to use an A/B switch. Just remember, the EF101 is an instrument, NOT an effect. It WILL NOT alter the tone of the inputted device!
The CV jack allows you to plug an external Control Voltage source into the EF101 (another EF101 for example).
Results may vary depending on what you use. We have found that certain inputs will affect the overall rate of the oscillation, while others will alter the frequency. Remember, the point is to increase the overall sonic chaos.
- POWER –
The EF101 can be powered by a 9V battery or a regulated 9V power supply (center negative). The circuit uses a very efficient low power chip, so 1 battery should last you a long time. To replace the battery, you must unscrew the
4 screws on the bottom of the enclosure and remove the base.
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