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17

    The VCO signal is then routed to the mix effect VCA. The Mix control 

sets the ratio of the direct to effect signals, and the output level control 

sets the overall output level when the effect is active. 

The Front Panel

B

ypass Switch:

 The Bypass switch is a rugged yet smooth acting switch 

that can be used as a stomp switch or manually activated switch for 

toggling between bypass mode and effect active mode. When the effect 

is bypassed, the Bypass LED will be red. Note that the bypass circuit of 

the FreqBox is a high-quality buffered bypass with unity gain. It will not 

"suck tone" as do some vintage effects. Also note that the effect circuits 

are disconnected from the input buffer in bypass, so the Level LED 

does not indicate the presence of an input signal in bypass mode. This 

means that the effect’s circuits do not load the output of the buffer at all, 

eliminating any effect that they may have on the bypassed tone. When 

the effect is active, the Bypass LED should be green, and an input signal 

is indicated by the Level LED.

Drive:

 The Drive control is only active when the effect is on (The Bypass 

LED will be GREEN). It sets the input sensitivity of the MF-107, so 

that it will work with instrument to line-level inputs. The Drive control 

can also be turned up for overdriving the input signal.  The Level LED 

is for showing the strength of the output of the drive circuit and can be 

used as a reference for setting the Drive control. When the Level LED is 

OFF, then there is no input signal, or it is very low. When the Level LED 

is Green, it indicates a low-level drive signal is present. When the LED 

turns yellow-orange, this indicates that the drive signal is at the optimal 

level. When the LED turns RED, it indicates that the drive signal is 

beginning to clip. 

     The Drive signal is also used as the input to the envelope follower 

and the FM signal for the VCO. This means that the setting of the Drive 

control has an affect on the response of both the envelope amount 

control and the FM Amount control, as both rely on the dynamics of 

your playing. For optimum use of the envelope follower, you’ll want to 

set the Drive control so that your normal signal causes the Level LED 

to light yellow-orange. A little red is OK for the peaks of your playing.  

If overdrive is desired, turn the Drive control up until the Level LED is 

mostly RED. Now the drive signal will no longer be clean. One result 

of increasing the Drive control is that you also increase the level of 

the signal available for FM. Another is that the drive signal becomes 

Содержание moogerfooger MF-107 FreqBox

Страница 1: ...fooger MF 107 FreqBox TABLE OF CONTENTS Introduction 2 Getting Started Right Away 4 Basic Applications 6 FreqBox Theory 10 FreqBoxFunctions 16 Advanced Applications 21 Technical Information 24 Limited...

Страница 2: ...ith the audio input All performance parameters are voltage controllable which means that you can use expression pedals MIDI to CV converter or any other source of control voltages to play your MF 107...

Страница 3: ...t the time Mark Kline Mark had brought him this same idea a week or so earlier and had already begun building a feasibility prototype I compared my sketch to the plans for the prototype Lo and behold...

Страница 4: ...e or most other countries 2 Connections Connect your instrument to the FreqBox AUDIO INPUT Connect the AUDIO OUTPUT of the FreqBox to your amp Connect your Expression Pedal such as the Moog EP 1 or EP...

Страница 5: ...w try turning the FM amount all the way up and turn the Sync OFF You ll get a sizzly sound that is not clearly pitched Turn the Waveform down all the way and the effect gets less sizzly As you turn th...

Страница 6: ...Setup This setup is best used with an expression pedal plugged into the Freq input and clean single note lines The expression pedal can be used to sweep the frequency of the VCO slowly for slow harmon...

Страница 7: ...late the frequency of the VCO using the envelope follower Hard playing causes the frequency to go up and you get more sweep of the VCO from the envelope follower This is a really good setup to use wit...

Страница 8: ...balance between the instrument sound and the VCO sound Foot Theremin This is basically the same as the previous setup with the addition of an expression pedal to control the VCO frequency It s difficu...

Страница 9: ...t play too hard or the gongs may sound flatulent FM sizzler This is a weird one good for otherworldly synth type sweeps An expression pedal controls the VCO frequency Try starting with the expression...

Страница 10: ...really high pitched sizzly sounds in the toe position FREQBOX THEORY Fundamentals of sound Let s start with some definitions Please read this section carefully as it will help you to understand the b...

Страница 11: ...octave above middle C with a mellow muted quality like a flute or a whistle A 100 Hz sine wave also sounds mellow and muted but its pitch is more than an octave below middle C VCOs The heart of the F...

Страница 12: ...each harmonic decreasing by the same ratio it increases i e the 2nd harmonic is 2X the frequency of the fundamental but 1 2 the amplitude of the fundamental The rest of the harmonics continue in this...

Страница 13: ...strongest as long as the Master Oscillator frequency is lower than the oscillator that is reset In fact if the Master Oscillator is much higher in frequency than the synced oscillator the synced oscil...

Страница 14: ...many sidebands are audible In a system like the FreqBox where the amplitude of the Carrier is constant the number of audible sidebands are determined by the amplitude of the Modulator This means the t...

Страница 15: ...your instrument the louder you play the higher the VCO frequency In the FreqBox the VCO output is sent to a VCA that is modulated by the envelope follower This allows the dynamics of your playing to c...

Страница 16: ...itude of the drive output and generates a CV that goes higher as the drive output gets louder The output of the envelope follower is applied to the control input of the VCA controlling the loudness of...

Страница 17: ...7 so that it will work with instrument to line level inputs The Drive control can also be turned up for overdriving the input signal The Level LED is for showing the strength of the output of the driv...

Страница 18: ...ctaves higher Wave The Wave control is used to set the waveform of the VCO The legend around the control indicates approximately the locations of the waveforms The basic waveforms are triangle sawtoot...

Страница 19: ...ockwise the amount of FM increases Note that because the depth of FM is also related to the strength of the drive signal that the Drive control and the dynamics of the input signal affect the depth of...

Страница 20: ...zero to 5V CV signal The range of effect from a zero to 5V CV is 100 of the range of the front panel control FM Amount CV In accepts a zero to 5V CV signal The range of effect from a zero to 5V CV is...

Страница 21: ...FreqBox to be too dynamically sensitive for your style of playing or too dynamically sensitive to your instrument try putting a distortion device or compressor before the FreqBox This will have the e...

Страница 22: ...sparkly sounds You can easily substitute other time varying CVs such as the LFO triangle wave for further exploration of this idea PWM Figure 17 PWM Figure 16 Sample and Hold Sync This setup uses the...

Страница 23: ...x VCO frequency in relation to the Voyager s Oscillator 1 Figure 18 Using the FreqBox with a Voyager VX 351 There are some technical considerations for using the FreqBox for this and similar applicati...

Страница 24: ...use with the MF 107 should contain a 50KOhm or 100KOhm linear taper potentiometer which is connected from the sleeve to the ring terminals The potentiometer wiper is connected to the tip terminal The...

Страница 25: ...ou must obtain prior approval and an RMA number from Moog Music before returning any product to us Wrap your MF 105 carefully and pack it with the power adaptor in its original carton The warranty wil...

Страница 26: ...amount of input signal to frequency modulate the VCO LEVEL a three color LED that shows the level of the input signal BYPASS a two color indicator LED that tells whether the effect is active or bypass...

Страница 27: ...2 lb SHIPPING WEIGHT 4 lb including power adaptor and instruction manual POWER REQUIREMENTS 120 volt 5W 220 volt power adaptor available on special order MOOG MUSIC Inc 2004E RIVERSIDE DRIVE ASHEVILL...

Страница 28: ...28 Notes...

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