Comparison

Virtual Technician vs AUM

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

Head to head
About

Virtual Technician

This app allows musicians to digitally adjust the sound, touch, and tuning of their Kawai digital piano. Shape the piano's character in real-time with an intuitive interface, learning about acoustic piano adjustments.

Highlights
  • Adjust sound, touch, and tuning
  • Simulates professional piano technician refinements
  • Shape piano character to personal preferences
  • Regulate hammer and key release noises
  • Fine-tune string, lid, and damper resonances
  • Intuitive iPad app interface
  • Learn acoustic piano characteristics
Read full description

Adjust various sound, touch, and tuning characteristics of your Kawai digital piano, as if you were a professional concert tuner. The knowledge and skill of an experienced piano technician is essential to realise the full potential of a fine acoustic piano. In addition to meticulously tuning each note, the technician also performs numerous regulation and voicing adjustments that allow the instrument to truly sing. The Virtual Technician feature of Kawai digital pianos simulates these refinements digitally, allowing musicians to shape various aspects of the piano’s character to suit their personal preferences. Perform touch weight and voicing adjustments, regulate subtle hammer and key release noises, and fine-tune string, lid, and damper resonances – all in real-time, from the comfort of an intuitive iPad app. ・Attractive interface created by Kawai’s award-winning design group, following the same traditional philosophies expressed in our acoustic and digital pianos. ・Learn to adjust various acoustic piano characteristics through the app’s elegant graphical interface and detailed explanations. ・Use the app’s Preview function to hear a sample passage that demonstrates the current setting with the instrument’s piano sound. Compatible models: Kawai CN39/CN29/CN37/CN27/CN17/CN35/CN25/KDP110, CS11/CS8, ES110/ES8, CA58/CA48/CA28/CA97/CA67/CA17/CA33, CP1/CP2/CP3 * The ‘Lightning to USB Camera Adapter’ or ‘Apple iPad Camera Connection Kit’ accessory is required in order to connect an iPad to the Kawai digital piano using a USB cable. It is also possible to connect the iPad wirelessly using the Quicco Sound ‘mi.1’ Bluetooth MIDI device. * A software update may be required in order to utilise the Virtual Technician app with CN37, CA97/CA67 v1.05+ and CP Series (CP1/CP2/CP3 v1.04+) instruments. Please visit the support pages at www.kawai-global.com (CN37, CA97/CA67) and www.kawaius.com (CP Series) for further information. Compatibility: Requires iOS8.0 or later. Compatible with iPad.

About

AUM

This app is a versatile audio mixer, recorder, and connection hub for mobile devices. It allows users to connect various audio sources, route signals, apply effects, and record mixes with high fidelity. It supports advanced features like MIDI control, synchronization, and integration with other audio apps and hardware.

Highlights
  • Connect hardware inputs/outputs
  • Route audio and MIDI
  • Host Audio Unit extensions
  • Record mixes and individual tracks
  • Synchronize with Ableton Link
  • Built-in processing nodes
  • MIDI control and routing
Features
Read full description

AUM is the flexible audio mixer, recorder, and connection hub for your iPad, iPhone and iPod touch. Connect hardware inputs and outputs, Audio Unit extensions, Inter-App Audio apps, Audiobus, soundfile players, built-in signal processing and filters, in any configuration you want. Route anything to anywhere with mix-busses, effect sends, audiobus ports, and external multi-channel audio interfaces. Play hosted synths and instruments using the built-in keyboard or external MIDI controllers, or sequence them with AU MIDI plugins or from other apps using Virtual MIDI. Record mixes, individual tracks, or both, straight into the storage space of AudioShare (no copying of files needed), with synchronized start and end for perfect loops. Play back recordings, soundfiles and loops as channel sources in the mixer for backing tracks, further processing or mixing. Soundfiles can be opened from anywhere, including USB drives on iOS 13 and later. Route and filter MIDI in any way you like using the MIDI matrix. Combine and filter MIDI endpoints using MIDI buses. Synchronize everything with the transport clock and play in time with other apps or devices using Ableton Link. Connect external music machines and synchronize them with MIDI Clock. Includes built-in processing nodes for various stereo processing, Mid/Side balance and conversion, EQs and filters, limiting, clipping and saturation. Or use any 3rd party Audio Unit extension or Inter-App Audio effect. All controls in the mixer can be controlled via MIDI, including parameters of hosted and built-in plugins. "A brilliant idea that has been brilliantly executed. Top-notch technical stuff and highly recommended" - MusicAppBlog "Feature rich, powerful, intuitive, and simple to use" - DubSpot "Executes live mixing with surprising ease, with a load of extensive features under the hood, quick snappy response on the screen and audio" - AudioNewsRoom FEATURES • High quality audio up to 32-bit 192kHz • Clean and intuitive user interface with crisp vector graphics • Unlimited number of channels • Unlimited number of effect slots • Inserts and sends are configurable pre/post-fader • Internal busses for mixing, effect sends, signal splitting • Supports multi-channel audio interfaces for both inputs and outputs • Supports built-in speaker and mic, including stereo mic on devices that has it. • Supports Audio Unit extensions, Inter-App Audio and Audiobus • Route MIDI output from Audio Unit extensions • Supports Audio Unit multiple output and input busses (for side-chaining etc) • Highly accurate transport clock • Metronome with selectable output and optional pre-roll • Sends host sync to Audio Unit plugins and IAA apps • Play in time with Ableton Link, with Start/Stop support • Slave external hardware via MIDI Clock • FilePlayer with sync and looping with access to all your soundfiles • Records straight into AudioShare storage space • Record synchronized beat-perfect loops • Built-in nodes for stereo processing, filtering and dynamics • Latency compensation makes everything align at the outputs • Optional manual compensation using TimeOffset • Multiple Inter-App Audio / Audiobus output ports • Audiobus state saving • Built-in MIDI keyboard • Fully MIDI controllable • MIDI Matrix for routing MIDI anywhere • MIDI filtering for any MIDI destination • Combine MIDI sources or destinations using MIDI buses BUILT-IN SIGNAL PROCESSING • Stereo balance • Stereo to mono • Stereo panning • Mid/Side balance • Mid/Side - Stereo convert • Invert Phase • Parametric EQ • Low-shelf filter • High-shelf filter • Low-pass resonant filter • High-pass resonant filter • LP/HP combo filter • First order All-pass filter • Second order All-pass filter • Gain • Hard clip • Saturation • Lookahead peak limiter • System-provided Apple Audio Units

Screenshots

AUM4 screens

Verdict

The call

The clearest difference is price: Virtual Technician at Free against AUM's $24.99. Virtual Technician also leads on in-app purchases (none vs 4) and iOS requirement (9.0 vs 12.0). AUM's advantage is review sentiment (82% vs 39%) and rating (4.7 vs 2.6). On 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

Virtual Technician is free to download; AUM costs $24.99 up front. AUM sells 4 one-off in-app purchases. Virtual Technician asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AUM holds the better App Store score, 4.7 against 2.6. That said, the two scores are not equally well evidenced: AUM has 535 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 39% of Virtual Technician's written reviews are positive against 82% of AUM's.

UpkeepUpdate frequency

Virtual Technician ships an update every 7 months, AUM every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard9 real differences · 1 level
Virtual Technician versus AUM: the parameters behind the verdict, then further details
ParameterVirtual TechnicianAUM
PriceFree — better$24.99
Rating2.6 (9 ratings)4.7 (535 ratings) — better
Positive reviews38.7% of reviews81.9% of reviews — better
Number of ratings9535 — better
Update frequencyEvery 7 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS9.0 — better12.0
Further details — not scored
Size14 MB13 MB
Age rating4+4+
DeveloperKawai Musical Instruments Manufacturing Co., Ltd.Kymatica AB

Customer experience

Virtual Technician

All ratings9 ratings
Positive44.4%
Neutral0.0%
Negative55.6%
Written reviews31 reviews
Positive38.7%
Neutral3.2%
Negative58.1%

AUM

All ratings524 ratings
Positive93.3%
Neutral1.5%
Negative5.2%
Written reviews315 reviews
Positive81.9%
Neutral5.7%
Negative12.4%

Bugs and requests

Virtual Technician

Not enough reviews yet to summarise bugs or requests.

AUM

Reported bugs

3 issues
  • Crashes or freezes when using certain plugin combinations
  • Compatibility issues with iOS 15 and newer
  • Inconsistent MIDI transport controls

Requested features

4 requests
  • Add MIDI clock sync receive capability
  • Implement a timeline/sequencer view
  • Provide more visual customization options
  • Improve support for external hardware integration

In-app purchases

None

Virtual Technician

No in-app purchases

4 purchases

AUM

One-time4
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$4.99
Show 1 more
  • Huge Tip$9.99

Questions

Is Virtual Technician free?
Virtual Technician is free to download, with no in-app purchases.
Is AUM free?
AUM costs $24.99, and also offers in-app purchases.
Which has better reviews, Virtual Technician or AUM?
AUM is rated higher. Virtual Technician averages 2.6 out of 5 from 9 ratings, while AUM averages 4.7 from 535 ratings.
Do Virtual Technician or AUM have ads?
Neither Virtual Technician nor AUM shows ads.
Which is updated more often, Virtual Technician or AUM?
Virtual Technician ships an update every 7 months, and AUM every 3 months. Most recently, Virtual Technician was updated on November 1, 2026 and AUM on November 2, 2026.

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