Amazing Slow Downer

Amazing Slow Downer

By Roni Music

  • Category: Music
  • Release Date: 2009-03-27
  • Current Version: 6.1.0
  • Adult Rating: 4+
  • File Size: 6.93 MB
  • Developer: Roni Music
  • Compatibility: Requires iOS 9.0 or later.
Score: 4.5
From 469 Ratings


If you're a musician who likes to learn new songs and techniques by listening to the same piece of music over and over but wish that the music could be played a little slower, then you'll enjoy Amazing Slow Downer. You can repeat any section of the music at full speed, slow it down or even speed it up by changing the speed between 25% (1/4 of original speed) and 200% (double speed) without changing the pitch! Change the tuning or musical key? No problem, Amazing Slow Downer handles that as well. Setup seamless loops by touching the "Set" buttons during playback. Amazing Slow Downer is the ideal tool for any musician, transcriber or dancer wanting to improve their skills. Important notes: Cannot play DRM protected files from the iTunes store (m4p and audio book files).



  • Perfect

    By buhlacious
    RONI is amazing. Responds quickly. Great customer service. Great app. Thanks!!! This is so beneficial. Thanks for taking shed time to build the features.
  • Life saver

    By Robby2011
    Every collaborative pianist needs this. Get it. You kill two birds with one stone by learning your part with careful practice while simultaneously learning your partners parts aurally. I just wish the app was more fun to look at.
  • Daily use as a guitarist!

    By alogonss
    This app is simply ... “Amazing”. I use it constantly to slow down difficult Guitar passages AND then loop them so I can practice long or short sections. It is perfect for learning solos or riffs with difficult timing. The sound quality is terrific though (as another reviewer mentioned) some distortion becomes audible at very slow speeds, but it is not intense distortion and doesn’t prevent hearing what you are trying to learn. Because I am using either MP3 or AAC, I’m sure the distortion is due to file compression. Having said that, there is zero doubt that I am a better guitarist because of this app. I would buy it again in a heartbeat due to its ease of use and solid feature set!
  • Waste of money, unfortunately.

    By CrenshawE
    I finally bought the program and attempted to open a song through my iTunes...low and behold, unable because of DRM on every tune in my library. Thank Apple:-(
  • iPhone ASD - Just What I Needed

    By rleemartin
    I’ve had ASD app on my MacPro for many years and use it daily but have to cart it around when not at home. This app for iPhone couldn’t be better. Now I have ASD in my pocket wherever I go!
  • GREAT app!

    By Unca Bo
    The most indispensable app I have! I use it for learning tricky passages, finding which key is comfortable to sing in, and for practicing licks in different keys. I tell everybody about it! And it goes with me from device to device without any problems.
  • Good App

    By AMil776
    At first I was a little scared by the price tag, but I have found this to be an amazing program and definitely recommend it.
  • Best tool ever

    By yesyes7
    I’ve used this app to learn a ton of songs. I’m a professional singer, musician and actor and this has served me very well. Perfect for singers who need different keys than the originals, and also to learn the words. I like to speed each song up to practice the lyrics faster so that when I sing it at tempo I can think faster than the words. If you’re looking for a tool to practice songs as a singer or instrumentalist, there’s no better app to do it. I never leave reviews. This one is special. Also, to the developer, please don’t ever abandon it, I need it! Thanks!
  • Was once great

    By GJStergios
    But has been so buggy the past couple of weeks that I will have to try an alternate product. Jams constantly.
  • As advertised!

    By Radsleep
    Great for slowing down difficult percussion passages. Some distortion is present at very slow speeds, but it's still completely workable. Didn't read all other reviews, but if you come across a "protected" file that won't import - there's a way around that too. ————- Checking back in on this app in 2018. I’ve used it religiously for the past 6 1/2 years and it is STILL amazing. Someone complained that it was too expensive at $15 (a few years ago). Are you kidding me?? For the serious musician that works at getting things right, this app is priceless. Given the amount of use, time saved, and difficult passages learned - I would in retrospect have gladly paid $50 for this. Regular updates keep it working smoothly. I also dislike that it won’t import protected songs from iTunes (which I HAVE paid for). Not the app designer’s issue - it’s Apple’s. But you can simply burn the songs you want to slow down onto a CD as a regular mp3 file, then import that version into your ITunes and import it into ASD. It’s an extra step, but again, if you’re serious, it works and is worth it. THANK YOU, app designer - this has been a godsend!