Comparison

Skipback AUv3 vs Beat Kitchen Harmonic Synth

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

Head to head
About

Skipback AUv3

Read full description

Skipback AUv3 implements a tool sometimes referred to as retrospective recording, or retroactive recording or capture MIDI, used by musicians, producers, and sound designers on more expensive electronic instruments. It continuously keeps your most recent audio and MIDI performance in memory, so you can recover a great idea - even if you forgot to press Record. Add the Skipback Audio Unit extension to a track in a compatible AUv3 host, or use it to record the microphone in the standalone app, then play as usual. Audio passes through unchanged while Skipback maintains a rolling history of everything routed through it. When inspiration strikes, simply export what you just played. FEATURES • Retrospective audio and MIDI capture • Transparent audio pass-through • Selectable audio history: 10 seconds, 30 seconds, or 1 minute • Selectable MIDI history: 100, 1,000, or 5,000 notes • Export audio as 24-bit WAV • Export MIDI as a Standard MIDI File • Tap to save using the system share interface • Drag exported files directly into supported hosts (Koala Sampler, Helium in AUM, Cubasis, etc.) • Input level meter for monitoring audio • MIDI activity indicator • Compact interface designed to stay out of your way Skipback stores its rolling history in memory and only creates a file when you choose to export. Whether you are improvising, designing sounds, rehearsing a part, or experimenting with a new instrument, Skipback helps preserve the moments you did not know you wanted to record. Never lose a great take because you forgot to press Record. Requires a compatible Audio Unit v3 host. Host capabilities and drag-and-drop support may vary.

About

Beat Kitchen Harmonic Synth

Shape the overtone series directly to create unique sounds. This additive synthesizer allows real-time manipulation of harmonics, LFOs, and envelopes. Explore sound design and synthesis on your device.

Highlights
  • Additive synthesis engine
  • Overtone series shaping
  • Live waveform and spectrum response
  • Modulation matrix with LFOs and envelopes
  • AUv3 support
  • On-device processing
Features
Read full description

BKS Harmonic is an additive synthesizer that builds sound from individual overtones, then gives you tools to shape, scan and filter them by harmony. Load it as an Audio Unit v3 inside AUM, GarageBand, Cubasis, Loopy Pro or any AUv3 host, or run it standalone. A TUNER THAT KNOWS ABOUT STRETCH Tune mode turns the scope into a tuner: it names the note it hears and shows how far sharp or flat it is in cents, with a ring that closes as you land on the pitch. It tunes against the stretch curve rather than equal temperament, so it follows a real instrument. Stretch shapes the overtones inside a note; Key Stretch makes the keyboard follow it, so octaves widen the way a piano's do. FOURTEEN TUNING SYSTEMS, AND A TEMPERAMENT EDITOR Equal and Just, five historical temperaments, and six from outside the European tradition including Maqam Rast, Turkish Rast, Slendro, Pelog and the Harmonic Series. The Temperament slider is a morph, not a switch: fully left is Just, fully right is whichever you chose. Twelve bars show any system as cents away from equal; drag one to make the tuning yours, then copy it out as plain text. Tunings save with the preset. FIVE HUNDRED SCALES Searchable by alternate name: malkauns, nikriz, bhupali and freygish find the right set. THE PARTIALS ARE THE INSTRUMENT The partials display shows every overtone in your sound, and four tools work on it directly. FOLD sweeps upper partials below the fundamental, redistributing energy across harmonic layers — not a filter. The OVERTONE SCAN steps a spotlight through individual partials with triangle, saw or random patterns, and can visit only partials in the active scale. The HARMONIC GATE reinforces partials whose pitch class matches your chord and suppresses the rest: capture a chord, follow MIDI, split the keyboard, or pick the notes on the gate's own keys. SCULPT draws the level and pan of every partial, slides the curve up the grid as a formant, and locks partials in place while the rest moves. THE HARMONIC VOCODER Pass live input or a sample through the synth as an effect. Your sound travels through a bank of tuned peaking bells rather than being replaced by filtered noise: open the Air and the source stays dry, tighten it and the bands resonate into it. Key Track is the mode switch: on it plays as an instrument, off it is a fixed filter you can sweep. Aimed at a sample, the bands track that sample's spectrum as it evolves. One level-matched Blend control crossfades it against the oscillators. PULSE-WIDTH MODULATION Set the core to a saw and Source 2 to a saw: the two ramps subtract, which is what a pulse wave is, and the phase between them sets the duty cycle. Modulate it and you have PWM. A preset in the Utility folder is ready to play. MODULATION A cog on almost every control, so the synth's own engine can drive nearly anything in the interface, including the display. Sources include velocity, envelopes, LFOs, how many notes you hold, how many oscillators sound, the synth's own output level, and Atmo, a shape driven by 84 years of barometric weather data from the Beat Kitchen Weather Sonification Project. Rates run from audio rate down to cycles that span years. THE SCOPE A stereoscope, oscilloscope, spectrum and a live per-partial display. Glow takes the trace from a hard line to a diffuse bloom, Colour sets the hue, Trace Speed and Dot set how it draws — and every one is a modulation target. Route velocity to Colour and the trace shifts as you play. LIVE INPUT A headphone button passes the side-chain straight to the output, so you can hear and see your input with nothing held: green when signal arrives, amber when a bus is connected but silent, red when nothing is. Resynth Speed locks a sample's playback speed to pitch, tape-style, or keeps them independent. Every control has a tooltip, presets work offline, and a harmony wheel follows what you play. One purchase, every update. Made by Beat Kitchen, a music production and teaching community.

Screenshots

Skipback AUv34 screens
Beat Kitchen Harmonic Synth4 screens

Verdict

The call

Skipback AUv3 and Beat Kitchen Harmonic Synth are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Skipback AUv3 versus Beat Kitchen Harmonic Synth: the parameters behind the verdict, then further details
ParameterSkipback AUv3Beat Kitchen Harmonic Synth
PriceFreeFree
Rating—4.8 (12 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—12 — better
Update frequency—Every 3 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size2 MB59 MB
Age rating4+4+
DeveloperSignals Intelligence Sound LLCBeat Kitchen LLC

In-app purchases

None

Skipback AUv3

No in-app purchases

None

Beat Kitchen Harmonic Synth

No in-app purchases

Questions

Is Skipback AUv3 free?
Skipback AUv3 is free to download, with no in-app purchases.
Is Beat Kitchen Harmonic Synth free?
Beat Kitchen Harmonic Synth is free to download, with no in-app purchases.
Do Skipback AUv3 or Beat Kitchen Harmonic Synth have ads?
Neither Skipback AUv3 nor Beat Kitchen Harmonic Synth shows ads.

Other comparisons