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AIR Music Technology OPx-4 Pro Motion Expansion

Air Music Technology OPx-4 Pro Motion Expansion

$29.00 to $39.00

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ProAudioStar

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Page last updated Jun 22, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated June 22, 2026.

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Price

$29.00

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MPC Store

$39.00

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ProAudioStar

$29.00

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Price History

Based on price data from 1 merchant for "AIR Music Technology OPx-4 Pro Motion Expansion". Prices shown reflect NEW condition. Tracking began May 12, 2026.

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Description

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The AIR Music Technology OPx-4 Pro Motion Expansion is your gateway to a universe of soundscapes that are as dynamic as your creative impulses. This expansion pack is designed to complement the OPx-4 synth, infusing your compositions with a captivating rhythmic vitality and sonic depth.

Dive into a collection of 200 meticulously crafted sounds that are sure to inspire and invigorate. Whether you're crafting the perfect bassline or creating ethereal pads, Pro Motion offers a wide array of sonic textures to suit any musical style. Each sound is designed not just to fill sonic space, but to propel your music forward with an unmistakable sense of momentum.

With categories ranging from bass to bells, chords to guitars, and beyond, this expansion ensures that your music never stands still. Each sound has been developed to deliver precision and richness, giving you the tools to create music that resonates and captivates.

Unlock the full potential of your OPx-4 synth and transform your compositions with the Pro Motion Expansion Pack. Whether you're a seasoned producer or an aspiring musician, this expansion opens up new possibilities, pushing your creative boundaries and enriching your musical journey.

Key Features:

200 meticulously crafted sounds
29 Bass patches
12 Bell sounds
28 Chord variations
22 Guitar tones
8 Key patches
24 Lead sounds
27 Pads for atmospheric depth
30 Pluck sounds for rhythmic clarity
20 Synth textures
Requires an existing OPx-4 license

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about AIR Music Technology OPx-4 Pro Motion Expansion.

Features and functionality

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The OPx-4 is the only MPC synth with comprehensive modulation options, offering a true synth engine experience unlike preset-focused alternatives like Hype.
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Lacks a manual, leaving users to explore and learn through experimentation, which can be overwhelming due to complex screens and menus.
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OPx-4 has been described as having a complex UI with 31 menus, making navigation cumbersome for users who prefer streamlined interfaces.
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Comparisons

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Produces superior 4-operator FM sounds compared to the Yamaha TX81Z, thanks to its sample attack layer, FM matrix, and effects.
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Users note that OPx-4 is complex and a significant step up from simpler FM options like Microfreak oscillators.
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Owners compare OPx-4's FM capabilities to Access Virus, noting its ability to produce "cold" pad and sound textures.
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Value and pricing

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The MSRP is regarded as high, but significant discounts are available, sometimes reducing the price to as low as 20 euros during sales.
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OPx-4 was seen on sale for as low as $29 during past St. Patrick's Day promotions, indicating potential for significant price drops.
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Software and compatibility

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The interface and usability improve significantly in the PC/MAC plugin or standalone version despite some persistent issues.
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Activation requires an internet connection; MPC One users need Ethernet, while others might use Wi-Fi. No internet needed after initial activation.
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OPx-4, along with Flavor Pro, can function as standalone VSTs in a DAW, enhancing their versatility for different setups.
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User experience

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Modulation matrix errors and unconventional routing concepts detract from the user experience, with unipolar and bipolar modes not performing as expected.
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Users report difficulty in adjusting precise values with a mouse on PC/MAC, making fine-tuning FM sounds challenging without a trackball.
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Use cases and applications

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While live tweaking is less common with FM synths, the OPx-4 allows for engaging experimentation, particularly with frequency ratios and FM depth.
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Despite complexity, users enjoy spending hours tweaking patches, indicating potential for deep sound exploration and customization.
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OPx-4 offers unique FM sound capabilities that some users find unmatched, despite its less frequent use compared to other plugins.
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