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IOU
MANUAL V1.1

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Summary of Contents for APOLLO VIEW IOU

  • Page 1 MANUAL V1.1...
  • Page 2: Table Of Contents

    LIMITED WARRANTY ..........................3 INTRODUCTION ............................4 WHAT IS IT?................................4 SPECIFICATION ..............................4 INSTALLATION IOU ............................. 5 POWER................................. 5 IOU FUNCTIONALITY ..........................6 KEY ..................................6 INPUT ................................... 7 CONTROLS ................................7 SWITCHES ................................7 OUTPUTS ................................7 PATCH IDEAS ............................. 8...
  • Page 3: Limited Warranty

    Limited Warranty Apollo View Modular Ltd warrants this product to be free from defects in materials or construction for a period of one year from the date of purchase (proof of purchase/invoice required). This warranty does not cover any damage caused by misuse of the product, or any unauthorised modification of the product.
  • Page 4: Introduction

    DC Offset control range up to +10V on the 2x setting. At the core of IOU's interface are an attenuverter for signal scaling and inversion, and a unipolar DC Offset Slider with an LED indicator for visual feedback.
  • Page 5: Installation Iou

    IOU for proper polarity. Next, find a 2 HP slot in your Eurorack case for IOU. Connect the other end of the power cable to your Eurorack power supply, again ensuring the red stripe aligns with the -12V rail.
  • Page 6: Iou Functionality

    IOU Functionality 1. Input 5. Offset – Unipolar DC offset Slider 2. 1x / 2x Gain Select Switch 6. Standard Output 3. Pre / Post Switch 7. Inverted Polarity Output 4. Scale – Attenuverter...
  • Page 7: Input

    OUTPUTS IOU is equipped with dual-polarity outputs, providing both non-inverted and inverted versions of the processed signal. The non-inverted Out replicates the signal's post- processing state, while the inverted -Out provides an exact inverse, allowing for creative differential modulation techniques and exploration of phase cancellation effects in your patches.
  • Page 8: Patch Ideas

    Attenuate Connect your LFO, envelope, or audio signal to the IOU's input for attenuation. Ensure the DC Offset Slider is completely down to prevent unintended offsets. For more precise control of your signal's amplitude, position the Gain Switch at 1x. With the DC Offset not in play, the Pre/Post switch's position does not contribute to this patch.
  • Page 9 +10V peak for full modulation range, proceed as follows: Patch the +5V peak modulation source into the IOU's input. Select the 2x position on the Gain Switch to double the modulation voltage. Ensure the DC Offset Slider is at its minimum setting, if no additional offset is needed.
  • Page 10 Via Scale Knob: Connect your signal to the IOU's input. Set the DC Offset Slider to its minimum to avoid adding any offset. Ensure the Gain Switch is at 1x for unity gain. Rotate the Scale knob fully ACW. Use the standard Out jack to output the inverted signal.
  • Page 11 VCAs. Set VCA 1's initial state to fully closed, patching IOU's non- inverted Out to its CV control. Conversely, set VCA 2 to fully open, with IOU's inverted -Out connected to its CV control. As you move the DC Offset Slider, it will smoothly crossfade between the two VCAs.
  • Page 12 Note: Use both Out and -Out together to modulate two filters cutoff frequencies in a stereo patch. With the Slider's range at 1V, the IOU acts as a spread control, moving the filters' cutoffs in opposing directions—one octave up and down—creating a stereo spread effect.
  • Page 13 VCO signal into LFO rates suitable for modules requiring unipolar modulation: Connect your VCO/LFO's bipolar output to IOU's input. Set the Pre / Post switch to 'Post' to add the DC offset after scaling. Adjust the DC Offset Slider to set the base voltage level, effectively shifting the zero point up to the desired starting voltage for unipolarity.
  • Page 14 Preserving Signal Polarity with Negative Offset To maintain your signal's original polarity while applying a negative DC offset, use the Scale to first invert and attenuate your input signal as needed. Then, use the Slider to adjust the positive DC offset to your desired level. Finally, take your signal from the -Out jack, which provides an inverted output.
  • Page 15 Inverting Envelopes for Compression To set up a VCA for compression with IOU, derive an envelope from the audio signal using an envelope follower. Feed this envelope into IOU's input and invert it using the Scale control or the -Out. Patch the inverted envelope into your VCA's CV input, and open the VCA fully.
  • Page 16 Internal Clipping Hard clipping effects can be achieved using IOU. Patch your audio signal into IOU's input and switch to the 2x Gain to amplify the signal. Keep the Scale knob fully CW to ensure the full signal level. Adjust the DC Offset Slider to add bias, pushing the signal's peaks toward the onboard op-amps' clipping limit, which is just below the ±12V power rails.
  • Page 17 MANUAL V1.1 info@apolloviewmodular.com https://apolloviewmodular.com...

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