The Orchestral Collection Plug-Ins by Prosonus

Prosonus The Orchestral Collection is a legacy orchestral virtual instrument/sound library developed by Big Fish Audio / Prosonus that offers a comprehensive set of orchestral samples spanning the full symphonic palette from strings and brass to woodwinds, percussion, and harp.
The collection includes solo and section samples, basic articulations (sustains, pizzicato, marcato) and orchestral FX, making it useful for composers, arrangers, producers, and sound designers who need a broad orchestral toolkit.
This library has been released historically in multiple formats including a plugin version built on the UVI engine and is known for a warm, rich orchestral sound that, while somewhat dated compared to modern high‑end libraries, still finds use in various creative contexts.
User impressions note that the library can have some lo‑fi sample quality compared with modern orchestral collections, but that its breadth and breadth of instruments make it a fun and affordable option for general orchestral textures and hybrid compositions.

Specs:

Orchestral Content
Strings: sustained, marcato, pizzicato, FX
Solo & section violins, violas, cellos, double basses
Brass: trumpet, piccolo trumpet, flugelhorn, French horn, trombone, bass trombone, tuba, plus ensemble/orchestra patches
Woodwinds: flute, alto flute, piccolo, clarinet, oboe, English horn, bassoon, contrabassoon
Harp: single notes and glissandi
Percussion: timpani, tubular bells, triangle, cymbals, gong, snare/snares rolls, and more orchestral percussion FX
Sound Character
Warm, classic orchestral timbres typical of older sample libraries
Some unique/quirky ensemble effects and expressive articulations
Interface focuses on preset browsing and straightforward sound selection rather than deep performance scripting or advanced articulations
Performance Features
Simple interface with preset and category browsing
Basic volume, pan, reverb, and filter controls (plugin versions)
Sounds can be used as complete orchestral patches or layered in arrangements
Limitations Noted by Users
Some sample sets may sound dated or lo‑fi versus modern orchestral libraries
Less flexibility for real‑time articulation switching (e.g., keyswitching or CC) than newer virtual instrument libraries
Not designed as a full scoring engine more of a sample palette than an advanced orchestral instrument

Formats:

Stand‑alone VST / AU / RTAS / MAS plugin formats (for Windows and macOS) built on the UVI engine
Provides simple preset selection and playback without requiring an external sampler host
AKAI, SF2/soundfont, EXS24, GigaSampler, HALion, SampleTank and other classic sampler formats in some releases
These are primarily multisampled instrument banks mapped for use in hardware/software samplers
Legacy Distribution
Originally distributed on CD‑ROM and as downloadable sample packs
Some versions include separate audio assets and presets for different host environments