In the late '90s, SPL revolutionized the recording and live sound industries with their introduction of the Transient Designer. Birthing a sea change in dynamics processing, the analog Transient Designer and its plugin counterpart both use SPL's Differential Envelope Technology to produce level-independent dynamics processing. Unlike compressors, Transient Designer can transparently shape the attack and sustain characteristics of sounds no matter their level—jet engine-loud or whisper-quiet, constant or fluctuating—and without the need to fiddle with threshold, attack and release controls.

In fact, Transient Designer uses only two primary controls—Attack and Sustain—to process dynamics. In mere seconds, you can increase or decrease the attack portion of a sound up to 15 dB and simultaneously amplify or attenuate its sustain up to 24 dB. Make trap drums slam harder. Tame a ringing snare drum. Reduce excessive cymbal bleed into tom mics. Increase sustain on soaring guitar solos. Enhance crunchy pick strikes on electric guitar vamps. Make legato rhythm tracks pulse. Reshape reverb envelopes for non-linear response. All with the twist of just two knobs.

Now, with the release of the next-generation Transient Designer Plus, this venerated industry staple has become even more powerful. The new plugin has all the straightforward ease-of-use and speed of the original but adds potent new features that expand its uses exponentially.

More Powerful and Versatile
In Transient Designer Plus, the Output Gain control is placed before a new soft-clip limiter in the audio path. Say goodbye to lowering the fader for your track every time you boost the Attack or Sustain knob—the built-in limiter prevents digital clipping with all but the most extreme settings. But the limiter is also your ticket to pumping out bigger, more colorful and aggressive-sounding tracks. Crank the Attack and Output Gain controls on kick and snare drums with the limiter switched in, and your drums will sound louder, punchier and fuller with subtle distortion on peaks. A 10-segment LED-style ladder meter shows at a glance how much gain reduction the limiter is applying to the signal.

Parallel processing has also never been easier or faster with Transient Designer Plus, because the routing is all set up for you behind the scenes and controlled by one knob, the new Parallel Mix control. Get ready for full-bodied, in-your-face guitar tracks! Dial in over-the-top Sustain, then lower the Parallel Mix control to blend the supersize sound with the guitar's dry sound. It's the best of both worlds: bigger-than-life tone, but with detail, dynamic range and phase coherency flawlessly preserved.

Transient Designer Plus also adds powerful sidechain facilities that allow surgical, pinpoint processing that the original plugin and analog hardware could only dream of. On a submix for drums, switch in the internal sidechain's narrow bandpass filter and raise its center frequency to trigger enhanced attack on snare drum hits while leaving the kick drum virtually untouched. Setup is incredibly easy: A Sidechain Solo function lets you hear the filtered sidechain signal as you sweep the center frequency, homing in on your desired trigger in seconds.

Another extremely powerful feature in Transient Designer Plus is the new external sidechain input, which you can use to create ultra-tight grooves. Make kick drum hits trigger decreased sustain on a bass guitar track to firm up a loose rhythm section and make it pulse. Or make a staccato guitar track attack harder whenever Latin percussion instruments enter the mix. Your rhythm tracks will sound better than ever before.

New Undo and Redo functions—up to 32 steps for each—let you recover control setups you accidentally altered. Automate separate A, B, C and D plugin setups for verse, chorus, bridge and outro of your song to make every second of your mix sound perfect. Along with the new soft-clip limiter, Parallel Mix control and internal and external sidechain functions, these professional features make the Transient Designer Plus the most versatile, musical, potent and easy-to-use Transient Designer yet.

SPL hardware products can be found in the world’s most renowned facilities, and have become a staple for audio professionals ranging from home studio owners to top mastering engineers. With the growth of computer based audio systems, the need for the SPL sound in plugin form has also grown. With Analog Code plugins, that coveted SPL sound is now available right inside your DAW.

Download the fully functional 14-day demo today to hear for yourself! (No dongle required!)

VENUE AAX format is no longer available for this product. As of May 24th, 2018, the VENUE AAX format will not be part of the license. Current VENUE users don’t need to worry, everything that currently works will continue to do so. Only further development and support will end.


  • Separate controls allow for ±15 dB adjustment to Attack and ±24 dB adjustment to Sustain
  • Soft-clip limiter helps prevent digital clipping when generously boosting Attack and/or Sustain 
  • Internal sidechain filter sculpts the frequency response of the trigger signal to enable selective processing of audio elements embedded in subgroups, stems and mixes
  • External sidechain input enables processing of transients and sustain envelopes in audio path to be triggered by other sources or tracks
  • Sidechain Solo function monitors the sidechain signal, aiding adjustment of the internal sidechain's bandpass filter
  • Parallel Mix control adjusts the balance of wet and dry signals for fast and hassle-free parallel processing 
  • Link switch links left and right channels in stereo configurations
  • 32 steps of Undo and Redo
  • Four global setups can be stored, recalled and automated for instant changes to parameter settings across the entire plugin
  • 10-segment LED-style ladder meter shows the amount of gain reduction applied by the limiter
  • Signal-present and overload indicators aid troubleshooting to get your session quickly back on track
  • An essential mix tool endorsed by the world’s finest professional engineers
  • Four Settings buttons allow you to quickly store and compare four different settings
  • Mouse Wheel control of parameters

Audio Examples

Industry Reviews

  • Jody Wisternoff
    Jody Wisternoff

    SPL Transient Designer does exactly what I hoped it would do and lives up to its hardware equivalents famous status . Super useful on the drum buss for increasing bite/impact  ,… Read More

  • Thomas Gold
    Thomas Gold

    Sound is awesome, the original plugin version goes into a lot of my productions. PLUS version: I love the new parallel mix feature. I can crank up attack or sustain and just blend in the amount I… Read More

  • Rogerio Jardim
    Rogerio Jardim

    By far one of the easiest and most efficient tools out there. I am using not only on my drums, but on a lot of different instruments. I recommend the Transient Designer Plus to every… Read More

  • Stonebridge

    One of my go to plugs to get that smack in a snare or clap. Also great on loops to get what counts heard in the mix. Have used it on most mixes for over ten years. The… Read More

  • Toby Pitman
    Toby Pitman

    The TD+ is just fantastic! The SC function adds an extra level of power and control to your sound shaping. Love it!

Customer Reviews

  • ★★★★★
    Transient Designer Plus
    by audioangel
    Simply the best. That's why is has a plus in the name. Love it!
  • ★★★★★
    SPL Transient Designer
    by magnus_pe
    Best Transient tool ever
  • ★★★★★
    by Natemasterflex
    The SPL TDP is one of the best transient adjusters I’ve ever used, and it’s certainly my favorite! The ease of use makes it a reached for tool in every project and the quality of sound assures… Read More
  • ★★★★★
    The best transient designer
    by midmodman
    There are so many tools for shaping transients now, but this is still the best and the fastest one in my book.
  • ★★★★★
    So simple, so good.
    by Thermal
    For a long time I held off on upgrading from the original TD to TD+ as I didn't really see the added value. However, when I tried it I was amazed at how useful it is to target a specific frequency… Read More


  • SPL Transient Design Plus Nominated for 2017 TEC Award
    SPL Transient Design Plus Nominated for 2017 TEC Award

    Champagne corks were popping at SPL headquarters in Niederkruechten, Germany, as well as here at Plugin Alliance, when we recently learned that the SPL Transient Designer Plus plugin was nominated for the 2017 TEC Award in the category of Sound Processing Software (DYNAMICS/EQ/UTILITIES).

    The original Transient Designer was one of the most popular plugins in the Plugin Alliance, and the Plus version, released early this year, is not only a major advance in realism, but provides an array of new features like a wet/dry mix control and side chain.

    Congratulations to Alliance member SPL for this great and well deserved honor. If you haven't checked out the new Transient Designer Plus, find out for yourself why the TEC committee was so impressed by downloading a free, full function 14-day demo today, and stay tuned for more info on how you can cast your vote for the TD Plus!

  • Gearslutz 5 Star Review Award
    Gearslutz 5 Star Review Award

    "I have some other transient shaping tools, but Transient Designer Plus takes the cake. It’s easy to use, sounds great, and solves problems quickly. These SPL folks really know what they’re doing when it comes to transients." - Funkybot


Supported Plugin Formats
AAX DSP, AAX Native, AU, SoundGrid, VST2, VST3

Supported Operating Systems
Mac OS X 10.9 through 10.13
Windows 7 through 10
Pro Tools 10.3.10 or higher or most VST/VST3/AU-compatible hosts running on a supported operating system

Intel CPU only (minimum 2 GHz recommended)

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


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