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GuitarFlex vs Heavyocity guitars
Heavyocity's guitars and GuitarFlex do different jobs. Scoring Guitars 2 and Damage Guitars 2 are Heavyocity's guitar libraries for Kontakt Player: phrases, riffs, pads and textures for scoring, from $99 and $299. GuitarFlex is modeled, not sampled: a guitar you play note by note from MIDI, with presets for steel-string and nylon-string acoustic and electric clean, crunch and heavy guitars, a download of 18.2 MB, and $79.
What they have in common
- Windows 10 and 11 (for Damage Guitars 2), as a standalone program and as a plugin.
- Guitar parts from MIDI. Heavyocity's libraries and GuitarFlex both sit in your host and play when MIDI reaches them.
Where Heavyocity's guitars stand out
- Phrases and textures built in. Scoring Guitars 2 has pulses, phrases, pads, ambient beds and drones, and rhythmic pedals, with 300+ presets. GuitarFlex has no phrases of its own.
- Riffs with matching bass lines, leads and motifs in Damage Guitars 2, in three styles and three keys, with more than 600 melodic elements.
- A Designer Engine that layers hybrid and granular sources.
- Recorded guitars processed and layered by sound designers, plus a multi-sampled semi-hollow guitar in Scoring Guitars 2.
- Mac as well as Windows, with AU and AAX plugins as well as standalone and VST.
Where GuitarFlex stands out
- A guitar you play note by note. Heavyocity's pages describe phrase and texture tools for scoring. GuitarFlex plays a chord, a lead line or a part from a MIDI file, on any guitar preset.
- No other program. Heavyocity's libraries need Kontakt Player. GuitarFlex runs on its own.
- A stated size. GuitarFlex is an 18.2 MB download that installs at 43.9 MB. Scoring Guitars 2 is 4.1 GB compressed, and Damage Guitars 2 takes 7.95 GB on disk.
- $79, against a list price of $99 for Scoring Guitars 2 and $299 for Damage Guitars 2.
- No account and no online activation. A license key and your email address, entered once for each Windows user on each computer, and one license for one person, to use on all of their own computers. It never connects to the internet.
- Your own settings. Over 70 sliders for the pluck, string, pickup, body, amp, cabinet, reverb and EQ, in four slots (A to D) with Compare, Vary and Randomize.
- Your song to a file. It renders a MIDI file to FLAC, or to WAV with the included command-line renderer.
- Built to play ComposerFlex's band, our songwriting program, on the same PC with no setup. Strums and articulations arrive from ComposerFlex, not from special keys.
Which to pick
- On a Mac: Heavyocity.
- For ready-made riffs, pulses, pads and drones for a score: Heavyocity.
- For a guitar that plays whatever MIDI you give it, at $79: GuitarFlex.
- If you'd rather have no second program, no account and no online activation: GuitarFlex.
Owning both
They don't overlap much, so they can share one PC: Heavyocity for scoring phrases and textures, GuitarFlex for a guitar that plays your MIDI. GuitarFlex's demo is here; for Heavyocity, go by its own pages. This page doesn't compare how they sound. That's for your ears.
The facts side by side
Every fact about Heavyocity guitars is from Heavyocity's own pages, checked on 7 November 2026. Prices are list prices in US dollars; sales come and go.
| GuitarFlex | Heavyocity guitars | |
|---|---|---|
| How it makes its sound | Modeled. It computes every note as you play, from the physics of plucked strings: the acoustic presets sound through the guitar's body, and the electric presets through a pickup, an amp and a cabinet. It plays no recordings. | Sampled: recorded guitars that the maker's sound designers processed and layered (the maker's words). Phrase and texture tools for scoring rather than guitars played note by note. |
| Price | $79, one-time | Scoring Guitars 2 $99 and Damage Guitars 2 $299; on 7 November 2026 the maker showed a sale price shown on 7 November 2026 that will not last: $39 and $149 |
| Download and disk space | 18.2 MB download, 43.9 MB installed | Scoring Guitars 2: 4.1 GB compressed (5.33 GB uncompressed), direct download only; Damage Guitars 2: 7.95 GB on disk |
| Memory the maker asks for | 4 GB, with 4 cores or more and 100 MB of disk (the minimum we state for every Flex program) | Scoring Guitars 2: 4 GB of RAM (from a requirements list that names older systems); not stated for Damage Guitars 2 |
| Runs on | Windows 10 and 11, 64-bit | Scoring Guitars 2 lists macOS 10.11 to 10.13 and Windows 7 to 10 (an old list, so check before you buy); Damage Guitars 2 lists macOS 12 to 15 and Windows 10 or 11 |
| Forms | Standalone and VST3 | Through Kontakt Player: standalone, VST, AU, AAX |
| Needs another program | Nothing else | The free Kontakt Player: 5.7.1 or later for Scoring Guitars 2, 7.10.5 or later for Damage Guitars 2 |
| Copy protection | A license key and your email address, entered once for each Windows user on each computer. No account and no online activation. | Watermarked for each customer (the maker's page has a Watermarking section) |
| Computers per license | One license for one person, to use on all of their own computers | Scoring Guitars 2: authorized on no more than 2 systems at once (its license text); not stated for Damage Guitars 2 |
| Demo | A demo to download and try before you buy | Not published |
| Guitars included | Presets in groups: steel-string and nylon-string acoustic, electric clean, crunch and heavy, and a two-guitar band preset; four slots to layer sounds | Scoring Guitars 2: pulses, phrases, pads, ambient beds and drones, rhythmic pedals and a multi-sampled semi-hollow guitar, 300+ presets. Damage Guitars 2: riffs with matching bass lines, leads and motifs in three styles and three keys, a Designer Engine that layers organic, hybrid and granular sources, and over 600 melodic elements |
More: virtual guitars compared: modeled and sampled, a table of 25 products, and all about GuitarFlex.
If something here is out of date, write to [email protected] and we'll correct it.