# Soundtract

> Real-time audio noise reduction and manipulation for musicians and transcribers. (iPhone/iPad app by Alex Shaykevich.)

- Source: https://appshunter.io/ios/app/soundtract/id816817050 (this page in markdown: same URL + `.md`)
- Developer: [Alex Shaykevich](https://appshunter.io/developer/816817053)
- Category: Music, Productivity
- Price: Free
- Rating: 2.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.1 · 8 MB
- Languages: American English
- Released: 2014-02-28
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/soundtract/id816817050/reviews.md

## What is Soundtract?

Soundtract is a little pocket audio app we put together initially to make transcribing field recordings easier. We then realised it's perfect for musicians learning to play by ear, etc... While it's a small app with a simple interface, Soundtract really packs a punch in the feature department. Perhaps the thing we're most proud of, and where the app gets it's name, is the ability to apply very sophisticated noise reduction in real time to existing audio. We use a technique known as spectral subtraction, where we literally remove the noisy bits from the audio. Not only will Soundtract clean up audio recordings, but you can import the your VIDEOS as well, clean up the audio, and re-export back into video. And unlike other apps, our noise reduction is done on-the-fly in real time. Other notables features include the ability to zoom and isolate portions of audio for replay, reduce tempo by up to 30%, and export m4a and mov formats.

Features Include:

- Import all non-DRM audio from iTunes.
- Import the audio channel from videos.
- Real-time noise reduction based on spectral 
   subtraction. Noise can be chosen automatically or 
   isolated specifically by selection within the waveform.
- Fast OpenGL waveform rendering optimised for very 
   long recordings.
- Gesture-based panning/zooming.
- Tempo reduction up to 70%.
- Isolate portions of audio for looping playback.
- Resume last song and play marker location on  
   relaunch.
- MP4A export with all effects (tempo change/noise 
   reduction) for either whole audio or isolated portions.
- Video export. Export “clean” audio back into the 
   original video source and render the new video back 
   into the Photo library.

## Key features

- Real-time spectral subtraction noise reduction
- Import audio from videos
- Zoom and isolate audio portions
- Tempo reduction up to 70%
- Export to m4a and mov formats
- Video re-export with cleaned audio

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/soundtract/id816817050/reviews.md

### 2/5 — Keep working on it

*2014-12-13*

This is the only app that I know of that does noise reduction beside Wave Pad. Wave Pad is completely busted in iOS 8, and its developers are not at all interested in fixing it any time soon. (Regardless of the fact that they could make a ton of money from it.) This app has a lot of potential given its place in the app market. Unfortunately it simply doesn't work very well. The noise reduction leaves far too many artifacts. It's unusable at this point. But I will be waiting to see if the developer makes some improvements.

### 4/5 — Good but.......

*2014-04-11*

This works really well. Better than I expected. What it needs is the ability to copy/paste from other apps like Multitrack Daw. This app is going to be more useful to those who record and create music and only having access to the iTunes bit of your phone is a drag. Great for noisy video recordings but awkward for anything else outside the library.

So please include copy/paste to make a very promising app into a must have app. A flexible noise reduction tool for iOS will be so useful for those of us who enjoy recording our own music. Maybe a bit more functionality like that found in Adobe Auditions noise reduction system (I'm being greedy here). Need to be able to toggle reduction on/off without having to select noise profile every time and also needs a switch to hear noise only to make selecting the best level of reduction easier. 

Great start. Very impressed. Please please develop this app further.

**********

Update

Video export does not work. Audio but no video. Oh dear. Please sort this out!!

## Frequently asked questions about Soundtract

### What is Soundtract?

Soundtract is a pocket audio app designed to make transcribing field recordings easier and assist musicians learning to play by ear. It offers real-time noise reduction and tempo manipulation.

### How does Soundtract reduce noise?

Soundtract uses a technique called spectral subtraction to remove noisy parts from audio in real time. Users can let the app choose the noise automatically or isolate it by selecting within the waveform.

### Can Soundtract be used with videos?

Yes, Soundtract allows you to import the audio channel from videos, clean it up, and then re-export the modified audio back into the original video, saving it to your photo library.

### What are the tempo and export options in Soundtract?

Soundtract can reduce the tempo of audio by up to 70%. It supports exporting in m4a and mov formats, with effects applied to either the whole audio or isolated portions.

### Does Soundtract have ads?

No, Soundtract does not contain advertisements.

### What devices is Soundtract compatible with?

Soundtract is available for iPhone and iPod devices.

### What is the age rating for Soundtract?

Soundtract has an age rating of 4+.

### How often is Soundtract updated?

The latest version of Soundtract is 1.01, last updated on May 16, 2014. It was initially released on February 28, 2014.

## Version history (last 2 releases)

### 1.01 — 2014-05-16

Fixed a bug associated with video export.

### 1.0 — 2014-02-14

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*