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6

Input & Output

 

Input:

 Audio input of the filter. 

• 

The signal present at the 

Input 

will output from all filter types 

simultaneously.

Limiter Toggle:

 The 

Limiter Toggle

 sets a fixed level tanh[3] circuit. 

Limiting is only applied to the signal present at the 

Input

• 

When the toggle is in the up position, limiting/waveshaping  
is bypassed.

• 

When the toggle is in the down position, limiting/waveshaping  
is enabled. 

Gain:

 The 

Gain

 fader affects the signal present at the 

Input

• 

If the fader is in the up position, the signal present at the 

Input

 will be 

at its full scale amplitude.

• 

If the fader is in the down position, the signal present at the 

Input

 will 

be fully attenuated. 

• 

If limiting is enabled, the centre position of the 

Gain

 fader is 

optimised as a “sweet spot” for versatile general purpose use.

Inverting Input:

 Inverting audio input of the filter. 

• 

The signal present at the

 Inverting Input

 is inverted and will output 

from all filter types simultaneously.

• 

The level of the signal present at the 

Inverting Input

 is inversely 

proportional to the level of the 

Q

 parameter. As resonance 

increases, the signal present at the 

Inverting Input

 decreases.

• 

This functionality can be used for dynamic signal blending.

Low Pass Output:

 Low pass filter output. 

• 

Any harmonics above the cutoff frequency are attenuated.

Содержание I-o47

Страница 1: ...I 47 Multimode Resonator Filter User Manual...

Страница 2: ...Features 4 Installation Specifications 5 Overview 6 Input Output 8 Frequency Modulation 1 1 Resonance 12 Patch Examples East Coast Synth Voice Sine Wave Generator Set Phaser To Stun Kick Drum Kick Dr...

Страница 3: ...uirks A hybrid design of matched transistor pairs and precision op amps was used to create the circuit s semi discrete VCAs making the I 47 a beast of its own variety With on board limiter waveshaper...

Страница 4: ...r cable is connected to 12V 4 Connect the 16 pin side of the IDC power cable to the 2x8 pin header on your Eurorack power supply confirming that the red stripe on the power cable is connected to 12V 5...

Страница 5: ...s of a classic multimode filter resonator Key 1 Input 2 Limiter Toggle 3 Gain 4 Inverting Input 5 Low Pass Output 6 Band Pass Output 7 High Pass Output 8 Notch Output 9 Course 10 Fine 1 1 FM Input 12...

Страница 6: ...full scale amplitude If the fader is in the down position the signal present at the Input will be fully attenuated If limiting is enabled the centre position of the Gain fader is optimised as a sweet...

Страница 7: ...ntre frequency are attenuated High Pass Output High pass filter output Any harmonics below the cutoff frequency are attenuated Notch Output Notch filter output This is also known as a Band Stop Filter...

Страница 8: ...6Hz 16KHz Fine The Fine knob is used for minute control of the cutoff frequency of the low pass and high pass filters and the centre frequency of the band pass and notch filters Fine tuning is relativ...

Страница 9: ...ct Input can be used for consistent pitch tracking of the sine waveform effectively making I 47 a quadrature sine waveform oscillator Control voltage is summed with the level set by the Coarse and Fin...

Страница 10: ...s Output anti clockwise or the High Pass Output clockwise Notch CV Input The Notch CV Input is a bipolar control voltage input for the Notch parameter Signal present at the Notch CV Input will affect...

Страница 11: ...The Feedback Toggle enables and disables internal routing of the Band Pass Output to I 47 input When enabled increasing Q can result in self oscillation If the toggle is in the up position feedback i...

Страница 12: ...pass through More traditional East Coast patches would incorporate separate envelope generators for I 47 and the VCA Audio Path Connect the desired waveform of an oscillator to the Input of I 47 Conn...

Страница 13: ...ws I 47 to track the sequencer or keyboard voltage As higher voltages are generated the cutoff frequency increases Connect the gate output of the sequencer or keyboard to the trigger input of an envel...

Страница 14: ...not needed because a sine waveform only loses amplitude when patched through a filter This is because there are no other harmonics to attenuate only the fundamental Audio Path Connect the Low Pass Ou...

Страница 15: ...put of I 47 Connect the gate output of the sequencer or keyboard to the trigger input of an envelope generator Connect the envelope generator CV output to the CV input of the VCA and set the correspon...

Страница 16: ...e used to reset the cycle of the LFOs LFOs can be free running or in synchronized patterns such as fixed quadrature phase shifted or multiplied divided Audio Path Connect the desired waveform of an os...

Страница 17: ...Fine knobs to desired positions Set the Q knob to a desired position Set the Notch knob to 1 its centre position Set the level of both channels of the mixer to be equal Control Path Connect a bipolar...

Страница 18: ...Band Pass Output Set the fundamental frequency of the kick drum sound using the Coarse and Fine knobs Disable feedback by setting the Feedback Toggle to its down position Set the Q knob to a desired p...

Страница 19: ...set the FM Attenuverter just to the right of its centre position This sets the amount of pitch modulation for the kick drum sound Set the shape knob of c is to a logarithmic exponential response curve...

Страница 20: ...g between the oscillator and silence Audio Path Connect a square waveform of an oscillator to the Inverting Input of I 47 Monitor the Low Pass Output Set the fundamental frequency of the oscillator to...

Страница 21: ...c is to the Strike Input Connect the CV output of c is to a multiple Connect one copy of the c is CV signal to the FM Input and set the FM Attenuverter just to the right of its centre position This se...

Страница 22: ...waveform LFO modulates I 47 while a sub square waveform from C L pings the resonance of I 47 The sequencer sends voltages to the 1V OCT of the I 47 while simultaneously triggering c is The CV output...

Страница 23: ...ntrol Path Connect the 1V Oct output of a sequencer to the 1V Oct input of I 47 Connect the gate output of the sequencer to the gate trig input of c is Connect the CV output of c is to the CV input of...

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