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Hear It

Ever heard the robotic voice in Microtonic that reminds you to purchase? That is an example of what Bitspeek can sound like. But there is more to it. Check out the player below for some tracks where Bitspeek has been put to work.

You need Flash player to listen to the Bitspeek demo tracks

About Bitspeek

Bitspeek is a real-time pitch-excited linear prediction codec effect. Right now you are probably thinking, "oh, another one of those"? Or perhaps not. Chances are that you have never heard about "linear prediction", although most of us use it daily when we talk on our cell phones. Linear prediction coding is a voice compression technology that appeared in commercial products in the seventies and was implemented in some well-known speaking toys of the early eighties.

We have applied this technology to create a VST / AU effect plug-in that analyzes audio, extracts a number of parameters (including pitch, volume and formant data) and then resynthesizes the audio using a simple oscillator, noise and filter architecture.

We have added a number of playback parameters that adjusts the pitch and tonal quality of the sound as well as support for MIDI and a beat-synchronized "formant freezing effect". Despite having only a few simple controls, this box can produce a broad range of sounds from cheap speaking toys to high-end vocoder and talkbox effects.



  • Microsoft Windows XP or later
  • A host application that supports VST 2.4 plug-ins


  • Intel-based Mac
  • Mac OS X 10.5 (Leopard) or later
  • A host application that supports VST 2.4 or Audio Unit 2 plug-ins
VST 2.4 / Audio Unit plug-in Windows Vista Mac OS X Universal Binary

Try It

For evaluation purposes you are able to download and run Bitspeek without a registration. In evaluation mode a short audio drop out will occur from time to time until you register.

Download Bitspeek from our download section.

Bitspeek is a plug-in that require a host application that supports VST 2.4 or Audio Unit 2 plug-ins. If you do not have a host application you can still try out Bitspeek by downloading a free host such as VSTHost for Windows or VSTLord for Mac.

Recent comments

When you purchase our products you can choose to leave a comment. This is what our most recent customers had to say. Read all comments

  • love you    (Raza, United States)
  • Your products are great! There's nothing out there that can do what Bitspeek can do! You are a mad scientist (in a good way)!    (Steven, United States)
  • Awesome    (Rafael, Germany)
  • Always need a drumsound    (Frank, Netherlands)
  • hope it works the way I want it to. *crosses fingers*    (Luke, United States)
  • Fantastic!!    (Michiel, Netherlands)
  • awesome !!!!!    (Roberto Schilling Pollo, United States)
  • this one is amazing!    (Bruno, Germany)

Buy It

Purchasing Bitspeek allows you to use it fully and gives you free support and service upgrades.


$29 (+ VAT)


Registration keys are personal and are delivered by e-mail to the buyer after the order has been placed. You can also buy Bitspeek as a gift