Comparison

SWAM Contrabassoon vs PaSSBot

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SWAM Contrabassoon

This virtual instrument offers unparalleled realism and expressive power for contrabassoon sounds. It generates authentic performances dynamically, responding to subtle playing nuances, and includes a room simulator for immersive acoustic spaces. It's designed for musicians seeking a highly responsive and realistic digital double-reed experience.

Highlights
  • Physical modeling for authentic sound generation
  • Dynamic response to playing nuances
  • Room Simulator 'Ambiente' for spatial control
  • Standalone and AUv3 plugin support
  • Intuitive interface for all users
  • MPE and MIDI controller compatibility
Read full description

SWAM Contrabassoon for iOS: Unmatched Realism and Expressive Power in Your Hands! Whether you play with a wind controller like the EWI, a keyboard, or any other MIDI device, SWAM Contrabassoon for iOS gives you unparalleled expressivity. Part of the acclaimed SWAM Solo Woodwinds, SWAM Solo Brass, SWAM Solo Strings, and SWAM String Sections suite, it is a must-have for musicians seeking the most realistic and responsive virtual instruments available. Now featuring the revolutionary Room Simulator "Ambiente", this cutting-edge Physical Modeling technology delivers the depth and nuance of a real woodwind performance—in real time. Unlike sampled libraries, SWAM Contrabassoon doesn’t rely on pre-recorded sounds but generates authentic performances dynamically, responding to every subtlety of your playing, just like a real contrabassoonist. New Features and Key Benefits Room Simulator "Ambiente": Take advantage of advanced spatial control with the built-in Room Simulator "Ambiente", allowing you to position the instrument in a realistic acoustic space, interact dynamically with other SWAM instruments in the same virtual room, and create truly immersive performances. Additionally, the EQ and Compressor effects are available for fine-tuning your sound. Standalone and AUv3 Plugin: Perform in real time or integrate SWAM Contrabassoon seamlessly into your mobile production workflow. Intuitive, Inclusive Interface: Designed for everyone, including blind and visually impaired users. Expressive Control: Play with unmatched expressivity using MPE controllers, keyboards, breath controllers, or other MIDI devices. Top Features at a Glance Access a library of presets, create your own, or import presets from the desktop version. Customize every detail of your sound, including timbre, vibrato, and dynamics. Micro-tune the instrument with the Pitch Manager, supporting devices like MAQAM for advanced tuning systems. Add built-in effects like EQ and Compressor. Play with different instrument models to explore a variety of tonal colors and expressive possibilities. Use AUv3 to integrate with your mobile DAW (Logic, Cubasis, AUM) or apps like Camelot PRO for live performances. Who is SWAM Contrabassoon for iOS Designed For? Wind Controller Players: Looking for a mobile setup to perform live without needing a computer while still achieving an incredible sound. Keyboard Players: Frustrated by the limited expressive capabilities of normal sample-based plugins? SWAM Contrabassoon unlocks the full range of expression. Music Producers: Need a mobile setup to produce music from anywhere without carrying around expensive gear? SWAM Contrabassoon is the solution. Musicians Seeking Expressivity: Looking for a virtual instrument that allows you to express the full range of your musicality easily on your iPhone or iPad. IMPORTANT To fully harness the expressive power of SWAM Contrabassoon, a controller capable of continuous expression (such as a breath controller, expression pedal, MPE device, or wind controller) is required. Just like a real contrabassoonist shapes their sound with breath and embouchure, SWAM Contrabassoon needs expressive input for maximum realism. With SWAM Contrabassoon for iOS, you have the freedom to create lifelike woodwind performances on your iPhone or iPad. Redefine your music with unparalleled realism and expressive depth—anytime, anywhere.

About

PaSSBot

This app is a stochastic filter bank audio processor for iPad, offering advanced sound manipulation with various filter types and powerful stochastic generators. It allows for precise control over filter parameters and harmonic distribution, ideal for creating complex audio textures.

Highlights
  • Stochastic filter bank audio processor
  • Multiple filter types (Biquad, Ladder, SEM, Resonators)
  • Up to 64 filters in stereo
  • Powerful stochastic generators
  • Individual filter parameter control
  • Harmonic distribution options
  • Precision DSP rendering (<1ms control rate)
Read full description

PaSSBot is a unique stochastic filter bank audio processor. The desktop VST/AU version of PaSSbot has already arrived in February 2020 and this iOS version is equivalent to the latest version 2.1. PaSSBot filter types are Biquad, StateVariableFilter, Ladder, SEM and Resonators. With behaviors of bandpass, Lo + Hipass, Notch and up to 64 of them in true stereo ! The user can set values of center frequency, gain and resonance of the each filter, which will be then eloborated with powerful stochastic generators ( 4 independent GENs for each filter ) with continuous or discrete probabilistic distributions but also with standard waveforms. One can set each filter parameters individually, but also distribute them in harmonic order, again the harmonic spread ratio can be set by the user or even can be modulated by a GEN. Precision DSP rendering, less than 1milisec. control rate precision. The filters can run continuously or be triggered manually. In that case, each filter will be applied an independent AR envelope with configurable random duration. Important notes : - A recent iPAD model is being recommended and also setting the host buffer size to 128 or higher greatly helps to the CPU needs which also heavily depends on the number of parallel filters being used. - The resonators can be sensitive to input signal level. - The PaSSBot manual can be found at this link. https://www.sonic-lab.com/PaSSBot_files/PassBot_manual.pdf sonicLAB PaSSBot youtube playlist : https://www.youtube.com/playlist?list=PLP0cOkraQHDYUoMG6BETTN1eGm-Kq5z0T

Screenshots

SWAM Contrabassoon4 screens

Verdict

The call

The clearest difference is price: SWAM Contrabassoon at $29.99 against PaSSBot's $34.99. SWAM Contrabassoon also leads on update cadence (every 2 months vs every 4 months) and device support (3 vs 1). PaSSBot's advantage is ratings volume (8 vs 1) and iOS requirement (11.0 vs 15.0). On rating, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

SWAM Contrabassoon costs $29.99 and PaSSBot $34.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for SWAM Contrabassoon against 5.0 for PaSSBot. That said, the two scores are not equally well evidenced: PaSSBot has 8 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

SWAM Contrabassoon ships an update every 2 months, PaSSBot every 4 months. The most recent releases landed on October 17, 2026 and October 23, 2026 respectively.

Scorecard5 real differences · 5 level
SWAM Contrabassoon versus PaSSBot: the parameters behind the verdict, then further details
ParameterSWAM ContrabassoonPaSSBot
Price$29.99 — better$34.99
Rating5.0 (1 ratings)5.0 (8 ratings)
Positive reviews—100.0% of reviews
Number of ratings18 — better
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS15.011.0 — better
Further details — not scored
Size130 MB11 MB
Age rating4+4+
DeveloperAudio ModelingSonicPlanet Audio Video Teknolojileri Anonim Sti.

Customer experience

SWAM Contrabassoon

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

PaSSBot

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SWAM Contrabassoon

No in-app purchases

None

PaSSBot

No in-app purchases

Questions

Is SWAM Contrabassoon free?
SWAM Contrabassoon costs $29.99, with no in-app purchases.
Is PaSSBot free?
PaSSBot costs $34.99, with no in-app purchases.
Which has better reviews, SWAM Contrabassoon or PaSSBot?
SWAM Contrabassoon and PaSSBot are both rated 5.0 out of 5 on the App Store, from 1 and 8 ratings respectively.
Do SWAM Contrabassoon or PaSSBot have ads?
Neither SWAM Contrabassoon nor PaSSBot shows ads.
Which is updated more often, SWAM Contrabassoon or PaSSBot?
SWAM Contrabassoon ships an update every 2 months, and PaSSBot every 4 months. Most recently, SWAM Contrabassoon was updated on October 17, 2026 and PaSSBot on October 23, 2026.

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