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  E-MU Systems

 

RFX-32

 

RFX Flanger

 

Sweep Rate parameter sets a maximum sweep rate that 
will be further modulated by the controller.

 

• System Tempo - LFO 1 synced to Seq/Arp/MIDI clock

 

When set to System Tempo, the LFO frequency is 
controlled by the EOS system’s internal tempo, and runs 
at the tempo division indicated by the Sweep Rate 
parameter. In this mode, the LFO1 sweep oscillator will 
be restarted at the beginning of its sweep whenever the 
EOS arpeggiator or sequencer are resynchronized. In 
addition, any non-zero value applied to the LFO Resync 
modulation parameter will also restart the sweep when 
LFO or System Tempo are selected as sources.

 

• MIDI - MIDI CC value controls the flange delay.

 

When the Sweep Source is set to MIDI, LFO sweeping 
and synchronization is disabled and the flange delay is 
controlled directly by the Flange Delay modulation 
parameter. The MIDI controller (contoured by the 
Sweep Shape parameter) will modulate the flanger 
between the minimum and maximum delay times set 
by the Flange Range parameter. This is the only time 
that the Flange Delay modulation parameter is active.

 

The Sweep Rate 

parameter 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 parameter sets the multiple or 
submultiple of the system’s internal rate to which the 
sweep LFO is synchronized, from a submultiple of 1/120 
(one cycle per minute at a tempo of 120BPM) to a 
multiple of 137 (275Hz at 120BPM).

 

Sweep Shape

 

This parameter controls the shape of the modulation 
waveform that controls the flanger delay time. The 
possible sweep shapes are Triangle (linear sweep), 
Curved (a warped Triangle), Sine, Log (an approximately 
logarithmic shape which “flattens out” towards shorter 
delay times), or Square.

Each Sweep Shape also has a “Dual” selection. When 
Dual sweep shapes are selected, a 180 degree (inverted) 
copy of the normal LFO waveform is applied to 
alternate stages of the flanger. Thus in Mono/Stereo and 
Stereo I/O modes, the right output channel flanging is 
out of phase with respect to the left channel, which 
creates dramatic stereo spatial effects. In Mono I/O 
mode, this inverted LFO phase is only applied to 

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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