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K7D - Tape Delay

K7D - Tape Delay

AUv3 plugin included

79 ratings
45 reviews
🔧 Utilities
🎵 Music
$3.99

Lowest price: $0.99 2 years ago (-303%)

Price history

Details

Released
May 6, 2019
Updated
October 29, 2026

Features

Developer

Imaginando Lda
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K7D - Tape Delay screenshot #1 for iPhone
K7D - Tape Delay screenshot #2 for iPhone
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About

This app offers a vintage tape delay effect with analog emulation and modern controls. It recreates classic hardware echo machines for a warm, characterful sound. Use it standalone or as an AUv3 plugin in iOS DAWs.

✓Analog modeled dual playhead delay
✓Modeled microphone input with saturation
✓Normal and Ping Pong modes
✓High pass and Low pass feedback filters
✓Powerful LFO time modulation
✓BPM syncable delay time
✓MIDI delay time modulation
Show original description

What users say about K7D

Reviews of K7D are mostly positive: the Music app is rated 4.6/5 from 79 App Store ratings. What users like most: incredible sound quality, creative and musical delay. Top complaints: extreme lag and crashes, audio delay issues and glitches. Summarized from real user reviews.

Positive things

  • 🎶Incredible sound quality
  • 🎨Creative and musical delay
  • 💡Generous presets and easy to use
  • 💰Top-tier for the price
  • 🕰️Authentic tape delay feel
  • ✨Brings new possibilities
  • 💯Dream come true for tape delay
  • 🎹Lush buttery delays
  • 🔊Rich and beautiful sound
  • 👍Intuitive and configurable
  • 🚀Fully featured tape delay
  • 🌟Amazing tape delay
  • 🎶Great for trippy soundtracks
  • ✨Sleek and intelligent UI
  • 🤩Echoplex for iPad
  • 💯Nails analog recording feel
  • 👌🏽Best tape delay found
  • 💫Unique sound and functionality
  • 🎵Organic and wild effects
  • 💖Loved by developers
  • 👍Highly recommended
  • ✨Gem waiting to be discovered
  • 💯Best buy
  • 👍High quality effects
  • 🌟Wow & flutter effects

Negative things

  • 💻Extreme lag and crashes
  • 🐛Audio delay issues and glitches
  • ⚠️High resource usage
  • ❌No background audio standalone
  • 📉Randomiser not working (initially)
  • 💥Will not load
  • 🪫Unusable on older devices
  • 😵‍💫Disappointing progress loss
  • 🐌Slow to fix bugs
  • 📱iPad and iPhone versions not compatible
  • 👎Preset quality questioned
  • 🔌Issues with Audiobus 3
  • 👂Input issues with interfaces
  • 🤏Small UI elements
See all reviews

What's New in K7D

1.4.6

October 29, 2026

- Your K7D documents are now visible in the Files app. - The About box now shows the build number next to the version. - K7D now requires iOS 17 or later. - Fixed an occasional crash in the app and AUv3 caused by the system's accessibility services. - Fixed parameters mapped to a MIDI controller jittering while being swept in AUv3 hosts such as Loopy Pro and AUM. - Fixed the TEMPO display showing a whole number at first and two decimals once the tempo changed.

More

User reviews

Most RecentHighest RatedLowest Rated

Magic sound tour

The best iOS app for the poor artists to apply for the sound theatre ，amplify the tiny sound and create a magical ambient,really helps me a lot
DDingdingtone

Response from developer

Thank you so much for this review! It's amazing to hear K7D is helping you create those ambient soundscapes for your theatre work. Comments like this make all the work worth it. If you ever have ideas for new features, feel free to reach out. Happy delaying!

Incredibly beautiful and creative

What a stellar and musical delay. I put this up there with Kosmonaut on iPad. What a generous set of presets. It’s also so easy to use and create your own presets. This feels more creative than Valhalla DSP’s delay. Just incredible, truly is chefs kiss👌🏽
**JayLane*

Response from developer

Thank you, this genuinely made our day! Being mentioned alongside Kosmonaut means a lot, and hearing it feels more creative to use is exactly what we were going for with the presets and workflow. Really appreciate you taking the time to write this.

Have bought here and on windows, great delay

For the price this is top tier. Best delay on iOS sub 20 bucks.
Ddungeonsynth444

Response from developer

Thanks a lot for this, glad K7D is delivering that kind of value for you. Comments like this mean a lot. Enjoy exploring K7D

One of my FAVORITE Tape Delays hands down!

I happen to see this on AppRaven (I have had this app for years) and it’s one of the BEST out there! Don’t get me wrong there are other AMAZING DEEP and VERY good sounding “Tape Delays” but this has the LOOK and FEEL one needs who grew up using 24 tape tricks to get Delays, Flange, Phase etc before all the rack mount gear and pedals and now PLUGINS!

I always ask myself, if I had ALL THIS technology back when I was first learning the trade off engineering, how freaking far advanced would I be? Bc let’s face it, bf plugins, effects were big $$$ and no young musician has money! I see all the FREE lessons, all the free guitar scale and chord programs and apps… and I think MY GOD how good would I be?
Then I realize, it would be the same as now, bc YES there is so many ways to learn for free… there is also so many KILLER games to play, killer things to check out, so many amazing content videos… that I being ADHD would not have as much knowledge as I have doing it “old school”
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TThirdnail

Response from developer

Thank you very much for your thoughtful review! We're thrilled that you are enjoying the analog character of K7D and that it brings back memories of those classic days. ☺️ We worked hard to capture the true essence of vintage machines, and we're so happy to hear it resonates with you!

Extreme lag and often audio delay issues and glitches

Nearly a year ago, I wrote a review for this app and I at least tried to be fair with the devs. It seems that doesn't work in this world, because I tried to get help with this app crashing and nothing works. I use an iPhone 12 mini, and every time I go over 10-15 instruments with the effect, the project completely crashes and either doesn’t open, I have to back it up to EVEN edit the tracks constantly, or it LITERALLY deletes hours to even days of progress depending on the crash. I tried to reach out through email. Got 1 response and was ditched. This was in December of 2024. It's 10 months later, and it’s even worse than it was nearly a year ago. For a paid app, it gets little to no updates and it's really starting to show considering I can’t even use it properly 50% of the time anymore. Either this app was just made for higher-end devices like MacBooks, or it is so outdated that only newer iPhone models can even keep up with this nonsense. Mind you, I tried reaching out through email to get help and got nothing. This is simply ridiculous. The number of times this plugin has erased hours of my progress is almost insane, and just so you know, it really is a good plugin, and I’d love to keep using it, but the amount of whatever space is used that causes all these crashes to happen needs to be fixed.
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CChrisMoeFoe

Response from developer

Thank you very much for your review! If you can please reach out to us through our contact page so we can assist you with the crashes you're having so you can have a smoother experience with K7D.

See 40 more reviews

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User experience

🐞

Reported Bugs

8 issues

App crashing with many instruments

Bug

Project crashes and data loss

Bug

App not opening after crashes

Bug

App deleting progress

Bug

Randomiser not working

Bug

App will not load

Bug

Digital pops and clicks with Audiobus 3

Bug

Dry signal only in one ear with stereo input

Bug
✨

Requested Features

9 requests

Fix background audio standalone

Feature

Fix randomiser feature

Feature

Improve CPU efficiency

Feature

Make iPad and iPhone versions compatible

Feature

Add reverse playback option

Feature

Allow MIDI assignment for knobs/functions

Feature

Improve input selection for interfaces

Feature

Update for Audiobus 3 compatibility

Feature

Make UI elements larger and more visible

Feature

FAQ

What does K7D - Tape Delay do?

K7D - Tape Delay is an audio effect plugin for iOS that emulates vintage tape delay hardware. It provides a warm, analog-sounding echo with extensive modern controls for creative sound design. It can be used as a standalone app or as an AUv3 plugin within compatible iOS Digital Audio Workstations (DAWs).

What are the key features of K7D - Tape Delay?

Key features include a 1ms to 1-second dual playhead analog-modeled delay with noise, tape distortion, and mechanical vibration models. It also offers a modeled microphone input with pre-amp saturation, normal and ping pong modes, and a powerful LFO for time modulation with multiple waveforms. The delay time can be synced to BPM or modulated via MIDI notes.

How much does K7D - Tape Delay cost?

The application is a paid app. There are no in-app purchases or advertisements mentioned in the provided description, indicating a one-time purchase for the full functionality.

What devices is K7D - Tape Delay compatible with?

This app is designed for iOS devices and functions as an AUv3 plugin. It can be used within iOS DAWs such as GarageBand, AUM, Cubasis, Auria, and Audiobus, allowing integration into a mobile music production workflow.

What are common use cases for K7D - Tape Delay?

Common use cases include adding vintage tape echo to vocals, guitars, or synths, creating rhythmic delays synced to a song's tempo, and exploring experimental sound design through LFO modulation and stereo width control. Its authentic analog sound makes it suitable for genres that benefit from warm, characterful effects.