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BIAS - Guitar and Bass Amp Designer and Modeler

By Positive Grid Inc

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APRIL ONLY! JAMUP PRO AND BIAS 50% OFF ($19.99->$9.99).

BIAS is an Amp Designer, Modeler and Processor. It's warm, accurate and more versatile than any other modeler, processor in hardware or software ever created.

Tap once to open your BIAS amp in JamUp app and add awesome multi-effects. Also check out BIAS Desktop (AAX/RTAS/VST/AU):

BIAS starts with stunning replications of 36 of the most sought-after vintage and modern amps in rock ‘n’ roll history and then lets you customize them to respond perfectly to your unique touch and feel. Swap out the tubes, preamp, transformer, tone stacks, cab and mic—even change the tube’s bias—to create your dream amp and distinctive signature sound.

Close your eyes, and you’ll swear you’re hearing the real thing. With BIAS, you own a complete virtual collection of the most coveted and unique guitar amps of all time—some dating as far back as the 1940s. Every amp model is meticulously engineered to respond to your playing with immediacy, sensitivity and realism that make you not only sound better but also play better. And BIAS sounds great on bass guitar, too.

But BIAS doesn’t stop there. Create totally new sounds by designing your custom dream amp. It’s as easy as tap and drag. Using BIAS’ highly intuitive and lightning-fast interface, it’s child’s play to instantly swap out colorful tube preamps, lush distortion circuits, classic tone stacks, boutique power stages, custom-built transformers and cabs loaded with specially matched speakers. The result is a depth and range of tones not possible using traditional guitar amps or other modelers. Whether you’re a classic rocker, metalhead, jazz player, bluesman or singer-songwriter—and whether you understand how amplifier electronics work or not—you’ll be dialing in killer, exclusive tones in a heartbeat.

BIAS integrates seamlessly with Positive Grid's free JamUp XT and optional JamUp Pro XT guitar multi-effects apps for iPad, expanding BIAS into a powerful and completely unified professional guitar system for live use, recording and jamming. Simply tap the JamUp icon on BIAS' upper bar to open your current BIAS amp setup directly in either JamUp XT or JamUp Pro XT. JamUp XT adds 1 amp and 6 effects to your BIAS rigs. JamUp Pro XT adds fully 6 amps and 16 stomp-box and premium rack effects - including distortion, compression, tape delay, tremolo and spring reverb. Both JamUp XT and JamUp Pro XT include Jam player, 8-track recorder and phrase sampler, tuner and metronome, effectively turning BIAS into a recording studio and top-of-the-line practice utility.

BIAS works with GarageBand and other audio apps using iOS’s Inter-App Audio and Audiobus. Whether recording, songwriting, or honing your chops—at home or on the road—BIAS places unequaled tone at your fingertips.

• The most complete, accurate, and versatile amp modeling available in the world
• 36 amp models included with the introductory release
• Factory categories organize amps by music genre and sonic impact: clean, blues, twang, crunch, metal, acoustic and bass
• 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 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 to recall each of your 8 favorite settings in turn with just one tap
• Seamless integration with JamUp XT and JamUp Pro XT, open and save your amp models inside JamUp with one tap
• Works with GarageBand and other audio apps via Inter-App Audio and Audiobus.

What's New in Version 1.5.10

What's new in BIAS 1.5.10:

This update adds new appearance support for BIAS Desktop amp models. It fixes tone stack's controls panel mapping issue and "save as" menu issue, and other minor improvements.

We continue to work with session artists world-wide to create professional custom amp models and amp-matched models made from recordings in leading studios. You can download BIAS Desktop demo for free at

BIAS Desktop is a groundbreaking guitar amp modeler with Positive Grid's Amp Match™ technology, it offers an entirely new concept of putting any tube amplifier tone and feel into a plug-in (AAX/RTAS/AU/VST) for Mac and PC. It features the most accurate, thorough and versatile guitar-amp modeler and designer engine, and it can accurately capture and match the tone of any tube amplifier, users can then share or download amp models from BIAS’s built-in ToneCloud® amp-sharing platform.

We've got some big things coming down the pipeline, stay tuned with us on our Facebook or Twitter!

Rock on,
The Positive Grid Team

iPad Screenshots

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Customer Reviews

Click... Crash. Uninstall, reinstall, repeat

I really wanted this app to work because it for the first few minutes you have with it, it sounds amazing. But as soon as you start playing with the amp models and options, something happens. Suddenly the base models are just gone. So you exit the app and restart to find yourself frozen on the opening logo screen.

You can repeat this simply by customizing an amp and then trying to save it as one of the presets. Poof, instant death. But for $20 the graphics look nice.

I do have iOS 8 (most recent updates applied) so it might be a compatibility issue. Hopefully an update will be coming. This would easily be a 5 star review if it just kept working because the sound and design is immaculate. When it works.

Best Amp Modeler

Most of the iOS guitar amp modelers are not that great. Bias on the other hand is easy to dial in. If you know just a bit about how a particular amp is designed and how it sounds you can come close. However, if you are on the edge of distortion, the decay is a bit harsh. Meaning that you can intermittently loose signal. By far though this modeler performers just as good if not better than my Line 6 Pod HD 500.

When used with Jamup pro you get a powerful recording tool. The upside is that if you are using the Desktop Pro version you can dial in amp matching and then share the model back to the iOS version.

Amazing Flexibility and Tone

I own most of the amp modelers for IOS. The best of them to my ear is JamUp Pro. I thought that would be it until I discovered BIOS. This is by far the coolest and most useful guitar tool I own. Now I'm able to get a truly signature sound and the fact that I can custom design and name each amp is an added bonus! After designing an amp I can launch it in Jam Up and save it along side the other amp presets. So now, not only do I get most of the vintage, modern, and boutique amps I want, now I can create my ultimate sound.

BIAS - Guitar and Bass Amp Designer and Modeler
View In iTunes
  • $9.99
  • Category: Music
  • Updated:
  • Version: 1.5.10
  • Size: 154 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPad.

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