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SPL Transient DesignerbyUniversal Audio
 SPL Transient Designer by Universal Audio is a Virtual Effect Audio Plugin. It functions as a VST Plugin, an Audio Units Plugin, an RTAS Plugin and an AAX Plugin. UAD Hardware is required.
SPL Transient Designer
Product SPL Transient Designer
Developer Universal Audio
Price (MSRP)
Type / Tags Envelope ShapingDynamics (Compressor / Limiter)
Plug-in, App & Soundware Format(s)
Hardware Powered  
Operating System Availability
Download Released
Downloads Released
Downloads Released
Miscellaneous Information
Copy ProtectionUAD Hardware Specific

Universal Audio partnered with Germany's Sound Performance Lab (SPL) to bring you the Transient Designer, with its unique and compelling Differential Envelope Technology for shaping the dynamic response of a sound. Two simple audio controls allow reshaping of the attack and sustain characteristics.

SPL was the first company to design an analog solution for level-independent shaping of envelopes, allowing transients to be accelerated or slowed down and sustain prolonged or shortened.

The Transient Designer has a multitude of studio applications and can be used to solve many types of audio track problems. You can shorten or lengthen the attack and sustain of percussive signals such as kick drum, snare or toms, easily take the bleed from open mics, or expand the room sound of overheads.

The Transient Designer can be applied to virtually any other signal as well: Amplify or reduce the picking sound of an acoustic guitar, hold the sound of strings longer, reduce the reverb time of a choir. Attack can be amplified or attenuated by up to 15 dB while Sustain can be amplified or attenuated by up to 24 dB. Lastly, Output allows quick gain matching with the unprocessed signal.


  • UA modeled, SPL authorized and endorsed plug-in version of Transient Designer's unique Differential Envelope Technology.
  • Increase or decrease the transients of percussive sources for greater impact, or a softened response.
  • Sustain of sources can be transparently shortened or increased for greater musicality.
  • Reduces or increases room sound or preexisting reverb on virtually any source.
  • Highly useful as a gate substitute, a transparent tool for minimizing mic bleed.

A Note about UAD Powered Plug-ins
UAD-2 and UAD-1 Powered Plug-Ins run exclusively on Universal Audio's UAD DSP Accelerator Cards. All available Powered Plug-Ins are included in the UAD Software Installer/Updater Package; and every Plug-In title has a separately activated 14-day trial -- so users can try before they buy, at their own pace. Once a user decides to purchase a Plug-In, they can click on the Plug-In toolbar "Buy" button, which automatically takes them to the www.uaudio.com website and carts the plug in; or this can be done manually via browsing our webstore. Once the purchase is complete, a downloadable Authorization File is made available. Users simply drag and drop this Auth. File into the UAD meter, and the Plug-In is authorized. UAD-1 users can transfer Plug-In licenses to UAD-2 format for free (one time only). Via Customer Support, Universal Audio also allows registered UAD owners to sell their UAD card(s) with Plug-In licenses, transferring the licenses to the new card owner (subject to Universal Audio approval).

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