DtBlkFx by Darrell Barrell is a freeware Fast-Fourier-Transform (FFT) based Multi effect VST plug-in for Windows and Mac.
This effect works differently to most others – instead of filtering or distorting audio data directly, it finds the frequency spectrum via a fast-fourier-transform and then does stuff to that.
DtBlkFx v1.1 features
- Precision parametric equalizing with sharp-roll off, adjust individual harmonics of a sound.
- Harmonic based (or comb) filtering, including active harmonic tracking.
- Various types of noise control, change contrast between loud and soft frequencies, clip frequencies or apply sound smearing.
- Frequency shifting, harmonic and non-harmonic shifting, including active harmonic repitch.
- Various methods of mixing left and right channels, standard and harmonic vocoding, convolution like mixing and more.
- Frequency masking, set harmonic or threshold masks for any effect.
- Up to 8 effects in series.
- GUI graphics can be customized.
DtBlkFx is available to download as a free VST effect plug-in for Windows and Mac. The download includes a manual in HTML format. You can also get a pdf version here (thanks George!)
Update: Note that Windows users can also get a 64-bit version at GitHub (thanks Dozius!).
DtBlkFx v1.1 (Windows) Download size: 3.00 MB
DtBlkFx v1.1 (Mac) Download size: 3.79 MB
The Mac version is built as universal binaries and should run on PowerPC & Intel Macs. Note that there is currently no GUI with this Mac version.
You can still download previous versions from the following posts: DtBlkFx v0.9 (Win), and DtBlkFx v1.0 (Win).



This is amazing… the world needs developers like this guy…
hi there, your DtBlkFx v1.1 (Windows) for windows is skipping numbers in hz. can you please fix this?
The plugin is no longer in development, sorry!
Too bad it’s no longer updated. No support in 64-bit applications :(
Such a flexible contortionist!!!
Hearty congratulations to the developer and thanks for the generous gift :D
ANy chance of a x64 compile?
Still one of my fav plugs ever.No alternative ;)
This is so good .. Darrell please update to 64bit make it payware if needs be!!
Love this effect :)
Brilliant documentation :)
Fantastic plugin! Thanks.
Unique and inspiring Plug-In that has become
one of mx favourite FX for all things leftfield.
Thanks for sharing!
I’d really liket to see more Plug Ins from you and wouldn’t mind paying for them either.
wow, simply amazing plugin! no other plugin gives you this amount of control over frequency composition. and it’s free!
if there were a GUI for the mac version, it would definitely be perfect.
Hi I’m having trouble getting this plugin to use PDC in Renoise. It shows up in the mixer as having a delay of 0.. Is that normal?
Amazing, unique sounding and user-friendly.
One of my favorite VST plugs for sure. Great when used with Kore, or Chainer, randomize to new dimensions.
best EFFEX plugin ever. PERIOD!!!
dtblkfx works perfectly with samplitude on win 2k and xp but bugs when installed in Pyramix as vst plug ,any one could explain me why?
Update or I’ll have to make a commercial version!
this thing is simply fertile!
i use it in all of my productions.
i’ve tried a demo of “magenta” and “morph” by prosoniq and i’m convinced that “DtBlkFX” is able to do exactly the same for a much greater cost-benefit ratio!
elden(vita minima recordings)
Thomas, I don’t think Darrell checks this page much. You can reach him at the email address that’s in the manual html (included in the download).
Would you be willing to allow a Mac developer to add a Mac GUI?