u-BACCH How-To Guide


Welcome to Universal BACCH. u-BACCH is a series of stereo speaker filters that create a 3D soundstage from any stereo content played through symmetrically placed, matched speakers. This is achieved through our patented, best in class, cross-talk cancellation filters. Our filters are industry leading with no coloration, tonal distortion, or dynamic range loss. So you can hear exceptional 3D audio over stereo speakers any time, with no penalty.

For more info, visit our FAQ: https://www.bacch.com/faq

For additional plugin guides, check out u-BACCH Support


Simply download and install following the prompted instructions on your device. Default installation locations for plugins can be found here:

  • Mac Global: [Macintosh HD]/Library/Audio/Plug-Ins

  • Windows: C:\Program Files\Common Files\VST3

On Mac, you’ll have to place the VST3 in the VST3 folder, and the component in the component folder. Here’s a quick guide on that.

If running Rosetta or any Intel application on an ARM (M1/2) Mac, you’ll need the intel version of the plugin as well. Here’s a quick guide.

On windows, our installer will place the plug-in automatically in the folder above.

Upon first opening the plugin in a DAW of your choosing, you’ll be prompted to start a trial or activate. If you’ve purchased the plugin, you’ll have received a license code in your email along with the download link. Simply click “activate” and paste in your license key. If there are any issues here, please contact info@bacch.com.

If you’re testing the software, start a trial! You’ll have 14 days of full use. 


uBACCH is a series of cross-talk cancellation filters based on the half-span angle of the speakers at the listening position, ranging from 1 to 90º.

You can imagine the two speakers and listener as forming a triangle: In an equilateral setup where the distance between left and right speaker is the same as the distance from either speaker and the listener, then the angle of the speakers would be 60º. To get your half-span angle, you’d simply divide that in half to get 30º.


  • A lot of studio monitoring situations will have stereo speakers with half-span angles anywhere from 20-35º (or higher).

  • A computer with symmetrical speakers to each side of the keyboard would be somewhere from 12-18º, a tablet held horizontally would be a similar range, and a soundbar several feet away could range from under 10-14º.

  • Please note these are ballpark numbers, just to give you an idea of where to start looking for your own devices.

Image from our android app showing a 30° half-span angle.

So how do you pick a filter angle?

While you could measure your stereo triangle and compute the angle, it’s actually much faster (and more accurate) to tune by ear. Simply enter tuning mode, click the Left or Right buttons to play noise, and move the slider until the sound is cleanly off to one side around 90º. Think of trying to get the ball of noise to sit within arms reach directly to either side. The actual perceived location varies by device based off of acoustic performance and geometry, but the target stays the same.

You only need to tune one side, whichever is more obvious to you. Once you’ve settled on a number, do some listening! You can always go back and re-tune.

NOTE - some DAWs require you to start playback to hear any sound generated from a plugin. Other daws, such as Premiere, may not let audio effects play noise themselves. We recommend tuning in another environment to find a suitable uBACCH angle first. 


Start simple with obvious stereo hard panning or even a binaural recording. Tracks like Money by Pink Floyd, Lovesong by Adele, or Afro Freestyle by Erykah Badu are great starting points.

When turning uBACCH on and off, there should be an obvious image change: those instruments and sounds located directly at the speaker in bypass should pop out to either side, or even approach either ear. This may be less obvious on very wide stereo setups, but you will still notice an increase in depth and immersion, especially with ambience and reverb.

Always feel free to retune while playing music, and give yourself some listening time — sometimes the most obvious change is actually going back to stereo and losing BACCH’s sense of realism and ambience.

Here’s a link to our Spotify Playlist.

A quick note on latency

Currently, our plugin doesn’t report latency to DAWs for delay compensation. However, there is indeed a very short latency added when listening through the (latest versions of the) plug-in, under 10ms. 

A quick note on buffer size

Our plugin currently requires minimum buffer sizes of 256 at 44.1/48kHz and 512 at 96kHz. If there are any clicks and pops, please increase buffer size a bit more

Where should u-BACCH be in my signal chain?

u-BACCH ideally should be the last processing on your master bus / stereo out. If you use room correction software, more often than not you still want uBACCH after the room correction, as many softwares such as Sonarworks alter delays and levels between left and right to create a more matched signal at the listening position. If this is before u-BACCH, it would ideally create a more symmetrical listening environment for uBACCH to perform in. On the other hand, if room correction is after uBACCH, it could alter the timing and phase within the BACCH filter and decrease performance. However, this is likely to vary depending on setup and software, so do feel free to experiment both ways! 


That’s all folks. There’s a video below that jumps more into u-BACCH. Happy listening!