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  E-MU Systems

 

RFX-32

 

RFX Flanger

 

Note that the various “alternate” cancellation modes set 
by the Flange Mode parameter will generally not be 
perceptible until the Flange Mult parameter is greater 
than 1 and more flanging stages are employed. Varia-
tions of the Flange Mult and Flange Mode parameters 
can create a wide variety of different flanging sounds. 
The exact effect of the Flange Mult parameter depends 
greatly on the I/O mode selected.

 

• In Mono I/O mode

 

, the Flange Mult parameter controls 

the number of flange stages used in series between the 
input and output. To hear the effect of Dual sweep 
shapes, the Flange Mult value must be greater than 1 
when in Mono mode.

 

• In Mono/Stereo & Stereo I/O modes

 

, the Flange Mult 

parameter controls the number of stages as well as the 
notch patterns produced by the flanger. Again, higher 
multiplier values produce more “extreme” effects. Dual 
sweep shapes are always applied in these Stereo output 
modes, regardless of the Flange Mult value.

 

Flange Mode

 

This parameter controls the type of cancellation 
produced at the various stages of the flanger. In 
conjunction with the Flange Mult parameter, it can 
produce widely varying flanging effects. When set to 
Positive, all flanging stages use positive cancellation, 
producing a “rounded” flanging sound; when set 
Negative, using all negative cancellation produces a 
more “hollow” effect.

When set to parameter values from “Alt 1” through “Alt 
6”, various patterns of alternating polarities are applied 
to different stages of the flanger. Note that these 
different patterns may or may not be perceptible until 
higher values of the Flange Mult parameters are used 
and additional flanging stages are employed.

O

O

O

O

 

In “Delay Only” mode 

the Wet/Dry Mix control can be 
used to manually control the 
amount of flanging. 

 

Flange cancellation is eliminated entirely when the 
Flange Mode is set to Delay Only. In this mode the 
input signals are processed straight through the flanger 
delay lines without encountering the spectral effects of 
cancellation with undelayed signals. 

 

(Note that the pitch 

shift produced by the sweeping delays and the shifting 
resonances produced by high feedback values will still be 
heard.)

 

 When used in Stereo output modes, this Flange 

Mode setting is useful for producing subtle spatial 
effects at low delay ranges and “double tracking” effects 
at higher delay ranges. Because the flange stages are 
connected in series, the effects of the Delay Only setting 
may be difficult to hear in Mono mode.

Содержание RFX

Страница 1: ...oppy disk into your E4 Ultra 4 Press Load from the main E4 screen and select the floppy drive 5 Locate the first Plug in on the floppy and Merge it with the current bank Repeat for any other Plug ins on the floppy 6 Press Master FX RPlugin 7 Select one of the new Plug ins using the data entry control PIXXX 8 Press the Copy function key 9 Select an empty Flash location for the Plug in pi100 pi199 1...

Страница 2: ... channels together while leaving their signal paths independent The block diagram of the Mixer Section is shown below There are actually two Locked modes which differ in the behavior of the single stereo Pan parameter Locked Pan mode Locked Pan mode When turned leftward the Pan control pans the right input signal over towards the left output channel and when turned rightward pans the left input si...

Страница 3: ...h of the para EQ band from 1 24th octave to 2 octaves adjustable in semitones Dialing in the Para EQ An easy way to dial in a parametric EQ is to increase the gain and narrow the bandwidth so you can really hear the effect of the EQ Next adjust the Center frequency control until you find the area you want to affect Now reduce the Gain and widen the Width to give a more natural curve EQ Gain Adjust...

Страница 4: ...its rate can be sync d to the system tempo tied to a MIDI controllable LFO or driven directly by MIDI synth modulation The simplified block diagram of the RFX Flanger is shown below L Out R L R Flange Offset Flange Range Modulation Smoothing MIDI Mod MIDI Mod MIDI Mod Multiple Delay Stereo Flanger 1 80 mS S H Modulation Rate Waveshape LFO 1 Sample Hold Source MIDI Mod rate MIDI Mod Resync MIDI Mod...

Страница 5: ...e Offset This is the offset or initial delay time to which the modulated delay sweep is added One way to view this is as the minimum sweep delay an interpretation that is shown in the display of the Flange Range parameter its delay range value is dynamically redisplayed as the Flange Offset changes The Flange Offset can be adjusted from a minimum of 0 actually 1 sample to 40 milliseconds Flange Ra...

Страница 6: ...rameter is inactive when the Sweep Source is set to MIDI Sweep Rate This parameter is a rate multiplier or divisor for the flange sweep When the Sweep Source is LFO1 this parameter manually sets the frequency of the internal sweep LFO1 to a tempo calibrated in beats per minute BPM from 25 to 1000 One complete cycle of the LFO will occur for each beat When the Sweep Source is System Tempo this para...

Страница 7: ...aximum feedback level which is further modulated by the Feedback Modulation parameter _ _ _ _ Use extra caution with your sound system and hearing when operating the RFX Flanger at high feedback levels While the flanger is stable up to 100 feedback it is still possible to produce clipping within the flanging stages and high output levels when the feedback level approaches 100 The amount of through...

Страница 8: ...produce widely varying flanging effects When set to Positive all flanging stages use positive cancellation producing a rounded flanging sound when set Negative using all negative cancellation produces a more hollow effect When set to parameter values from Alt 1 through Alt 6 various patterns of alternating polarities are applied to different stages of the flanger Note that these different patterns...

Страница 9: ... and before it is applied to control the delay lines O O O O Sweep Smoothing values greater than 0 may not be particularly useful until using the Log or Square sweep shapes which have sharp transitions that can benefit from some smoothing The main utility of the Sweep Smoothing is for smoothing the transitions between flange offsets produced by the flanger s internal Sample Hold Sweep Smoothing is...

Страница 10: ... Phaser is shown below Most parameters are unitless which implies that to achieve a particular effect the plug in must be tuned by ear to a particular input signal rather than analytically Experimentation especially with the Mod Range Env Attack Env Release and Env Shape parameters is necessary in order to explore the wide range of sonic effects The Envelope Phaser itself is composed of two separa...

Страница 11: ...ximum offset amount which is further modulated by the Mod Offset MIDI modulation input Mod Range This is similar to the Mod Range control on the RFX Phaser controlling the overall extent of phase shift that is affected by the signal envelope The difference is that it now incorporates a negative range varying from 100 to 100 By using a large Mod Offset value and a negative Mod Range the relationshi...

Страница 12: ...g the way in which audio signals with different dynamic ranges and crest factors affect the degree of phase shift A logarithmic response can often be used to smooth out the envelope of signals with erratic amplitude response without slowing the attack time Conversely a linear shape makes the envelope follower more sensitive to small amplitude changes and can be used to elicit more active phase shi...

Страница 13: ...the left channel audio input to drive the phase shifter allowing cross modulation between the enve lope of one signal and the audio of another Mono Inv L Env R This is similar to the Mono L Env R side chain mode except that the left input signal is applied to both left and right sides of the phase shifter The phase shifter then operates in the same way as for Stereo Inverted mode with the left and...

Страница 14: ... Scotts Valley CA USA 95067 0015 Telephone 831 438 1921 FAX 831 438 8612 EUROPE AFRICA MIDDLE EAST E MU ENSONIQ Suite 6 Adam Ferguson House Eskmills Industrial park Musselburgh East Lothian Scotland EH21 7PQ Telephone 44 0 131 653 6556 ...

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