Comparison

Colossus Piano vs SP6 Sound Editor

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

Head to head
About

Colossus Piano

Experience incredibly realistic piano sounds with a vast library of acoustic and electric piano models. This app offers advanced features like multi-velocity layers, pedal support, and MIDI integration for a professional playing experience.

Highlights
  • 13 high-quality piano models
  • 24 velocity layers per key
  • Sustain, Sostenuto, and Soft pedal support
  • MIDI integration (In/Out)
  • Audio Unit v3 and Inter-App Audio support
  • Low latency disk streaming
  • Adjustable tuning options
Features
Read full description

Colossus Piano sets a new standard in terms of realism, detail and overall quality of piano sounds on your iPad, iPhone and iPod touch. There are 8 acoustic piano models available as 8 individual in-app purchases, plus 5 E-Piano legends bundled as 1 sound set with this app, together those 13 piano models make up 30 Gigabyte of sound material. All keys of all piano models were recorded in full length with a recording quality of 24 bit and 96 kHz stereo. Note: this app requires in-app purchases to provide its functionalities! Minimum Requirement: at least iPad 3 / iPad Air 1 / iPad mini 2 / iPhone 5 / iPod touch 6th gen. Recommended: iPad Air 2 / iPad mini 4 / iPad Pro / iPhone SE / iPhone 6s or higher. The dark brown „Colossus Concert Grand” model:³ • 24 velocity layers per key. • Dedicated sustain samples. • Release hammer sound. • Optional pad sound. • 14 GB in size (SSD space). The white „Baby Grand” model: • 12 velocity layers per key. • Dedicated sustain samples. • Release hammer sound. • Optional pad sound. • 6 GB in size (SSD space). The „Upright Piano” model: • 8 velocity layers per key. • Dedicated sustain samples. • Release hammer sound. • Optional pad sound. • 3.4 GB in size (SSD space). The „E-Piano” sound set: • 5 legendary E-Piano models (plus different model generations or configurations). • 17 E-Piano sounds in total. • Optional pad sound. • Optional tremolo effect. • 1.6 GB in size (SSD space). For information about the other piano models, please visit our product website! This app supports Audio Unit v3, Inter-App Audio and Bluetooth LE MIDI ! Software features: • Modulation wheel support for controlling the most relevant sound parameter of the currently selected sound. • Warm pad sound of a well known analogue synthesizer (not available for all models) can be turned on/off as support for the piano sound; volume can be controlled by mod. wheel and expr. controller. • Sustain pedal support for holding notes. • Sostenuto pedal support for holding individual notes. • Soft pedal support for a more gentle sound. • Expression pedal support for controlling optional pad layer's volume. • Hammer sound when releasing keys, uses round robin, can be turned on/off and volume controlled (some acoustic pianos only). • Polyphony of up to several hundred stereo voices.² • Low latency disk streaming. • Configurable audio latency down to 1 ms. • Integrated effects (18 presets). • App States: Save app's entire state as user presets. • MIDI velocity response curve editor. • App can keep running in the background. • Master Tune, Scale Tuning & Hermode Tuning. • Provides Audio Unit v3 plugin version of this app, which allows it to be used as virtual instrument directly within 3rd party multi-track DAW apps. • Supports Apple's "Inter-App Audio" system. • Virtual on-screen piano keyboard with velocity support, scalable & scrollable. MIDI Player / Recorder: • Record, save and load your songs in standard MIDI file format. • Share your songs easily as audio file. • Unlimited amount of tracks. • Unlimited recording and playback length. • Open MIDI (.mid) files directly from other apps (i.e. from Safari, Mail). • Download or upload MIDI files with iTunes. • Metronome. • Use the "Tempo Zoom" dial knob to i.e. slow down playback at any time, learn your favorite songs more easily. ¹ For more information about supported adapters and MIDI keyboards, please visit our product website. ² Some sounds might use several voices per note. Polyphony depends on the exact device model being used. You find a polyphony table on our product website. ³ Important: the dark brown „Colossus Grand” piano model requires a large amount of main memory, so we only recommend this piano model for device models mentioned as „recommended” above.

About

SP6 Sound Editor

Read full description

This is Kurzweil SP6 Sound Editor for iPad. Some of SP6 Sound Editor's features now include: •Program Channel Mixer. •Editing of Program Common parameters including Insert and Aux FX selectors. •Basic Program Layer manipulation. Copy and paste of Layers from other SP6 Programs. •MIDI Continuous Controller tools and Virtual Parameter Table display. •Real time editing of all SP6 Multi Mode parameters. •Import of Multi Zones from other SP6 Multi. •Transmitting and receiving of Programs, Multi, FX Chains and other objects data. •On-screen keyboard. •Direct USB/MIDI connection with Apple iPad Camera Adapter. •Wireless connection possible using MIDI network. This SP6 Sound Editor is an app for iPad only. Kurzweil and SP6 are trademarks of Young Chang Co., Ltd. Soundtower is a trademark of Soundtower Inc.

Screenshots

Colossus Piano4 screens

Verdict

The call

The clearest difference is in-app purchases: SP6 Sound Editor at none against Colossus Piano's 9. SP6 Sound Editor also leads on iOS requirement (8.0 vs 12.0). Colossus Piano's advantage is update cadence (every 2 months vs every 5 months) and device support (3 vs 1). On price and ads 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

Both are free to download. Colossus Piano sells 9 one-off in-app purchases. SP6 Sound Editor asks for nothing beyond the download.

UpkeepUpdate frequency

Colossus Piano ships an update every 2 months, SP6 Sound Editor every 5 months. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Colossus Piano versus SP6 Sound Editor: the parameters behind the verdict, then further details
ParameterColossus PianoSP6 Sound Editor
PriceFreeFree
Rating3.3 (65 ratings) — better
Positive reviews54.5% of reviews
Number of ratings65 — better
Update frequencyEvery 2 months — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS12.08.0 — better
Further details — not scored
Size384 MB35 MB
Age rating4+4+
DeveloperChristian Schoenebeck d/b/a CrudebyteSoundTower Inc.

Bugs and requests

Colossus Piano

Reported bugs

27 issues
  • Crashes when exporting to WAV/M4A in GarageBand
  • App crashes when switching piano models
  • Audio Unit extension crashes
  • No sound when exporting to GarageBand
  • Plugin crashes in DAWs during export/freeze
Show 22 more
  • App crashes when loading MIDI files
  • Hammer sound too loud even at lowest settings
  • Low C1 note out of tune
  • Electric Grand F4 note sample start time issue
  • Electric Grand G#4, D5 notes have noise on attack
  • Plugin not loading properly in hosts
  • AUv3 interface scaled back
  • Exporting to WAV results in silence
  • App crashes during export/freeze
  • Japanese Grand has low volume
  • Colossus Concert Grand needs improvement
  • G1 key has loud, annoying noise
  • B flat 3 key sounds too flat
  • Crashing in AU mode
  • Bass notes drop out when holding damper pedal
  • Voice stealing makes piano perform unacceptably
  • Bass is muddy in Concert Grand
  • Note 26 (Bb2) sounds like an upright
  • Subtle nuance playing is nearly impossible
  • App crashes or freezes randomly
  • MIDI player doesn't work with GarageBand
  • Audio Units extension terminates unexpectedly

Requested features

14 requests
  • Add chorus effect
  • Global EQ
  • Release control
  • Tap tempo for modulation speed
  • Save velocity curves
Show 9 more
  • More intuitive UI
  • Zoom function for keys
  • Add release samples
  • MIDI export/import
  • Three-band EQ
  • Layering sounds on multiple MIDI keyboards
  • Ability to save setups
  • Improve AUv3 functionality
  • Add more piano models

SP6 Sound Editor

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Colossus Piano

One-time9
  • Vintage Upright$9.99
  • Historic S Grand$9.99
  • Pianino$12.99
Show 6 more
  • Japanese Grand$12.99
  • Classic B Grand$15.99
  • Upright Piano$19.99
  • Colossus E-Piano Set$19.99
  • Baby Grand Piano$26.99
  • Colossus Concert Grand$49.99
None

SP6 Sound Editor

No in-app purchases

Questions

Is Colossus Piano free?
Colossus Piano is free to download, with in-app purchases available.
Is SP6 Sound Editor free?
SP6 Sound Editor is free to download, with no in-app purchases.
Do Colossus Piano or SP6 Sound Editor have ads?
Neither Colossus Piano nor SP6 Sound Editor shows ads.
Which is updated more often, Colossus Piano or SP6 Sound Editor?
Colossus Piano ships an update every 2 months, and SP6 Sound Editor every 5 months. Most recently, Colossus Piano was updated on September 16, 2026 and SP6 Sound Editor on September 10, 2026.

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