Sospiro Strings - Slow, Emotive Strings (Bass, Cello, Viola,
Kontakt Hub
Sospiro Strings
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Ben Osterhouse


Sospiro Strings

Version: Kontakt 5.8.1 / NCW / V1.1

Slow, Emotive Strings (Bass, Cello, Viola, Violin)


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Product Overview

Sospiro Strings is a Kontakt library for creating slow, emotive strings. It features 4 different length swells and 3 sustained articulations, recorded on bass, cello, viola, and violin.

Please note: The FULL version of Kontakt 5.8.1 or above is required. Not for Kontakt Player

Changelog V1.1

  • fixed the B0 keyswitch playing a note in the Bass and Strings nki's.
  • fixed swell playing again when you release
  • added a small amount of velocity → volume control (there actually wasn't any before)
  • added labels to the Sustain and Swell panels so that it's possible to see right away which articulation is currently selected.
  • added key names to the keyswitches so that when hovering over them in Kontakt's keyboard, the names of the articulations are shown in the info bar.
  • added individual keyswitches for the 3 types of Sustains
  • If it's on the Swell keyswitch, and then you select a different type of sustain, it will automatically switch over to a Sustain keyswitch.
  • the modwheel was set to control the Length in Beats slider. I removed this to eliminate any issues this might have been causing.
  • Moved the volume control from the Sustains section to the Options section. It now controls both the Sustains and the Swells. This way you can now use CC 11 to control volume of both the Sustains and the Swells.
  • changed the IR to something that I think sounds better.
  • updated the features list on the product page
Kontakt Player


There are separate nki's for each individual instrument, and there is an nki with all instruments mixed together, to work as a simpler sketching tool, and also to save memory.
There are 2 varieties of Swells:
  • The vibrato swells are provide a warm, individual sound. The vibrato samples sound better or worse depending on how much they are being timed-stretched, which is why it is especially nice to have non-vibrato as an option. All of the swells were originally recorded at 110 BPM
  • The non-vibrato swells have a clear tone which especially brings attention to the change in tone as each instrument louder and softer.

Each version, Vibrato and non-vibrato has a single velocity layer. 

Using the Length in Beats slider, you can choose the appropriate length, and the corresponding swell will be chosen and time-stretched if needed.

The Length Multiplier is useful if you have a project with a fast bpm and you want it to sound slow, or vice versa.

The Smart Release feature makes it so that however far into the crescendo-ing part of the sample you have held the note, it will jump that far from the end of the swell. This means that the longer you hold a note, the longer its release will be.

All of the swells can be either vibrato or non-vibrato. The vibrato adds warmth and individuality to the sound, but may be a bit over dramatic in some cases. The non-vibrato has a lot of clarity, and especially brings attention to change in tone as each instrument gets louder and softer. The vibrato samples sound better or worse depending on how much they are being timed-stretched, which is why it is especially nice to have non-vibrato as an option.

The Sync feature is one of the most essential features: with Sync enabled, any notes you add or change in a chord will sync with the first note that was played.

There are 3 varieties of Sustains:

  • The cold sustains are played with a slow bow and no vibrato --a fragile sound at the edge of breaking.
  • The warm sustains are played over the fingerboard with a fast, freely changing bow and generous vibrato.
  • The full sustains are played closer to the bridge with a slow, heavy bow. Vibrato is used with discretion.

There is an option to double the sound, which layers two instances together and pans them slightly apart. This sounds better if you are only using one instrument by itself and only playing a few notes at a time. If you are playing big chords and layering all 4 instruments together, the doubled feature tends to sound more generic and uninteresting.

If you already own Pattern Strings you can get an extra 20% off Sospiro Strings with this code: SOSPATT20 - Code will expire on the 10th Jan 2020



5 Stars (14)
★ ★ ★ ★ ★ Verified Review

Oh Gosh....

I have always wanted an intimate strings section. But could not afford Spitfire Audios offerings (even British Drama Toolkit). This is answering my aspirations.
Now I can add the tone I was looking for with those sparse arrangements.
Really good value for money. And sounds better than it cost.
I have noticed when looping a section of music though, the swells reset themselves to the shortest setting. Which has caught me out. But now just check before exporting audio.
A good place to start if you want the intimacy of individual strings or together as a trio/quartet.

Tracing Arcs

★ ★ ★ ★ ★ Verified Review

Excellent and evocative

I recently used this in a BBC series I've been asked to write a few tracks for and Ben's libraries (I bought most of them) have been peppered throughout all the cues I wrote. Great sounds and they complement the bigger libraries I work with normally (Spitfire, Project SAM etc) really well. Very happy.

Cato Hoeben

★ ★ ★ ★ ★ Verified Review

Sospiro Strings

Great sound. Makes a great addition to Spitfire's OA Chamber Evolutions!

Ron Jacob Brookler

★ ★ ★ ★ ★ Verified Review

Sospiro Strings


Cari-Baczo Tibor

★ ★ ★ ★ ★ Verified Review

Excellent consistent quality solo strings

I was able to instantly user this collection of solo strings in a soundtrack I'm working on. I was impressed with the subtlety of the playing and this quality of the library made it easy to incorporate into the music. Highly recommended.

Brad Hoyt

★ ★ ★ ★ ★ Verified Review

Excellent range of sounds

The great thing about this library is that there are separate patches for violin, viola, cello and double bass, which means you can combine them in a variety of ways. For example; you can use the cold violin with a 2 bar swell with a warm cello with a 1 bar swell, giving lots of scope for experimentation. The quality of the sound is excellent, and also the fact there are a variety of sounds for each patch (the warm, cold, full etc). A very good product at a reasonable price.

Adrian Lane

★ ★ ★ ★ ★ Verified Review

Sospiro Strings The must have of 2020

What an amazing sound, sensational.

John Martin

★ ★ ★ ★ ★ Verified Review

great strings

love the sound of these strings...they fit great with my other samples and will be used a lot for sure...saw a lot of other composers using this over the last month and just had to have my eyes on more of Bens work...great and bargain price also

tracy culley

★ ★ ★ ★ ★ Verified Review



Matthew Head

★ ★ ★ ★ ★ Verified Review

It\'s worth more than $50...

Simply astonishing sound....Get it without any hesitation.

Rahul Dhakad

★ ★ ★ ★ ★ Verified Review

Gorgeous Organic String Recordings

Beautiful, intimate strings in this library. It rivals Kontakt instruments that cost five times as much. I wish I had known about Ben Osterhouse sooner. If you're looking for an organic and intimate sound, I cannot recommend this library enough.

Matthew Chilelli

★ ★ ★ ★ ★ Verified Review

Emotive and motivating

This library has a certain sound that can be described as reality. Very useful and inspiring. And as usual sleek and clean GUI with ease of use.

Turker Kurtonur

★ ★ ★ ★ ★ Verified Review

The dark horse of sample libraries

I started to see a handful of reviews pop on youtube for this library and my interested was piqued. I pulled the trigger and purchased it - the moment I loaded it up in kontakt and played the first few chords I was blown away. Ben you have out done yourself once again! Spitfire Audio and Orchestral Tools take notice of this talent. At a fraction of the cost of the aforementioned developers libraries Sospiro strings straddles the line between classical and avant-garde rather nicely. You won't find 100s of presets and snapshots - this baby is lean and mean music making machine. I tend to like the lack pretentiousness that comes with Ben's offerings - especially in his video walkthroughs. Straight to the point, no way to hide any deficiencies, but to my ears there is none as the gorgeousness of the samples and the scripting is on display here. Keep up the astounding work Ben! You have a loyal customer in me indeed! P.S. - Oh and the warm sustains - my god are they beautiful. Definitely my favourite part of the library!

sam spade

★ ★ ★ ★ ★ Verified Review

Incredible versatility!!

This boutique string library really adds a dimension to pieces you didn't know you wanted until you hit that first chord.....then bam...... string city!!, population, you and your happy clients!

Jonathan McCann

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