BIAS Desktop

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  • 36 authentic amp models to get started.
  • Complete BIAS amp design modules for customization.
  • Download thousands of amp models from ToneCloud.
  • Sync with BIAS iPad and iPhone.

    BIAS Professional

    sign up page (BIAS pro) icon

  • Everything from BIAS Desktop, plus:
  • Amp Match Technology to capture your tube amps.
  • Featured artists Amp Match presets download.
  • Glassy, Crunch & Insane Amp Expansion Packs.

    With over 500,000 lines of new code and 2 years development.

    BIAS Desktop is the world’s most accurate, thorough and versatile guitar-amp modeler and designer. Its advanced amp-modeling engine captures the warmth and feel of real tube amps in every aspect, component by component. To start, the plug-in includes 36 authentic models of the most sought-after vintage and modern amps in rock ‘n’ roll history.

    Easily modify amp models by swapping out the tubes, preamp, transformer, tone stacks, cab and mic with simple mouse clicks to create your own custom amps and unique signature sound.

    BIAS Overview by Ola Englund

    Tone Walkthrough by Steve Booke

    Accurately capture the sound of all your favorite tube amps.

    Amp Match Technology utilizes a collection of underlying technologies to analyze and compare your currently selected BIAS amp model and the sound of a target tube amplifier, its accompanying cabinet and the microphone used to capture its sound. It then executes the tonal compensation and enhancements needed to make your amp model’s sound accurately match that of the target tube amplifier.

    Sampling the world of tube amps.

    Fluff shows how he uses Amp Match Technology to capture his favorite tube amps.

    For the first time in history, guitar players can easily design, modify and capture the most unique, expressive and soulful tones, store them in the digital domain and recall them at any time for any recording application.

    Download amp models from the cloud.

    Share and download artist- and user-designed and matched amps right inside Positive Grid’s ToneCloud®.

    The tone-creation possibilities are now virtually infinite with BIAS. Download artists’ signature amps, or try out the latest and most popular matched amp models created by your fellow guitarists.

    Positive Grid is currently working with session artists and engineers world-wide to create professional custom amp models and amp-matched models made from recordings in leading studios. Stay tuned, as more is coming.

    “BIAS Desktop represents an entirely new concept in guitar sound. Its engine has the most authentic tube sound. The stunning interface makes it possible for users to edit more deeply to create the tones that before they could only have imagined. Amp Match Technology allows users to capture their golden tube amplifier, then share that amp and download other amp models on ToneCloud. BIAS Desktop is like Spotify for amps!”

    the Positive Grid team



    • The most accurate, thorough and versatile amp modeling software available in the world
    • 36 HD amp models included with the introductory release
    • Amp Match Technology captures any miked amp or recorded track and creates a matched model
    • Share and download thousands of matched amp models created by signature artists and your fellow guitarists on ToneCloud
    • Fully customizable preamps, tone stacks, power amps, transformers, cabinets and mic selection and placement—mix and match!
    • Customize the look and feel of your own amp panel; change the name, tolex, panel and knobs.
    • Works the way guitarists think: tweak gain and overdrive, swap out tubes and transformers, change the cabinet and mic position, and shape the tone with different tone stacks and two 8-band equalizers
    • Included noise gate and room simulator
    • Create a virtually unlimited number of custom amps
    • Quick preset facility recalls each of your 8 favorite settings in turn with just one mouse click


    • OS X 10.7 or later
    • Audio Units, VST, RTAS, AAX Native
    • Internet connection is required to activate license and access Tone Cloud. BIAS can also run under offline mode after activation and disable Tone Cloud.


    • Windows 7 (SP1) or Windows 8
    • VST, RTAS, AAX Native
    • Internet connection is required to activate license and access Tone Cloud. BIAS can also run under offline mode after activation and disable Tone Cloud.

    Support Host

    Host Requirements
    Ableton Live 8.0 or above
    Avid Pro Tools 10 or above
    Ardour 3.0 or above
    Apple Logic Pro 9.0 or above
    Apple GarageBand 6.0.5, 10.0 or above
    Cakewalk Sonar X2 or above
    Cockos Reaper 3.4 or above
    Harrison Mixbus 2.0 or above
    Steinberg Cubase 5.0 or above
    Steinberg Nuendo 4.3 or above
    MuTools MuLab 6.0 or above
    PreSonus Studio One Producer/Professional 2 or above