File Lab Web Applications: Audio Editor

Melanie Gross
Nov 27, 2011
Updated • Dec 11, 2012
Music, Music and Video

This free software package is completely browser based. Installation is very easy; just download a plugin from the File Labs site. After a small installation you have a seamless editor that enables you to modify audio files. You do not need to upload any files because this is run entirely locally.

The general user interface is very easy to control. Open a browser to Select audio editor, select your file and then begin editing.

audio editor file lab

This is the user interface within the browser:

Across the top of the interface are 2 main pages the first page is labeled Audio Effects. The 2nd page is labeled as Generate. We will cover the former in that it will be the most used.

Amplify: Decibels are a exponential scale: 0 dB is the lowest a human ear can hear. 10 dB is 10 times as powerful. 10 times more powerful than that is 20 dB. 1000 times as powerful as near silence is 30 dB. As you see minor variations within a decibel range can be significant. FileLabs Audio Editor allows for steps as low as 1dB up to as high as 6 dB.

Fade In/Fade Out: Audio Editor also allows for linear fade in and fade out. This can be very useful for audio tracks that

Normalize: This will take and find the peak of a waveform and bring all of the other audio to a level somewhere in-between the highest peak and the lowest. This is a good tool to use when you wish to bring the sound floor level up. It will amplify the weaker sounds while attenuating the sounds that are too high.

Mute: Mute is pretty self-explanatory it mutes the selected area of the audio file.
Invert: Invert flip the left and right channels within the audio file. You can select an area to invert or it will invert the whole file at once. It will change the polarity of the file on the horizontal axis.

Limiter: This is an audio compression algorithm that takes the peak and locks it into a set decibel range. It is generally used to remove a distortion to the audio signal. It is not evident in use and also on the site which form of limiting is in use, be it either hard clipping or with a fast release.

Auto Correction: Automatically enhances the sound aural characteristics reducing the dynamic range, normalizing and equalizing the audio.

Echo: Repeats the selected sound with the selected effect.

Reverb: Adds echo and multiple reflections of it. Use it in modeling acoustics in a hall, empty apartment,or some other type of room.

Tempo Change: Increases or decreases the tempo. Music will play faster or slower but the pitch is unaffected.

Equalizer: Boosts or cuts specific frequency bands and provides a visual representation of the resulting EQ curve. Use this to boost bass, midrange or treble of an audio file.

The 2nd page of the software application enables you to either generate silence or a signal. The signal can be a bell, chord or 440 Hz, A signal. This can be useful for testing audio devices.

This software is feature rich, fast and surprisingly elegant for a completely free browser based package.


Tutorials & Tips

Previous Post: «
Next Post: «


  1. Justin said on November 30, 2011 at 10:18 am

    The warning message about AAC streams when you load streams is because you don’t have the free Orban AAC/aacPlus Player Plugin installed.

    1. Martin Brinkmann said on November 30, 2011 at 10:56 am

      Justin, thanks for the information.

  2. santosh said on December 1, 2011 at 12:43 am

    does this support AAC ? or only mp3 streaming

    1. Martin Brinkmann said on December 1, 2011 at 1:43 am

      I’d say it supports all pls streams but I have not tried that so cannot verify it 100%.

  3. Barnabas said on August 3, 2012 at 5:15 pm

    Thank you Martin for a most informative and viable solution (it allowed me to play streams from a Netherland internet radio station in my WMP)! Continued success to you!

    Barnabas (USA)

  4. AppleRome said on October 7, 2012 at 7:31 am

    Your steps’ recommendation is still valid until 7th October 2012.. Thank you very much !!

  5. Laura said on December 1, 2012 at 4:41 pm

    Thank you!

  6. sak2005 said on December 9, 2014 at 8:03 pm

    You must convert file.pls to file.m3u
    because file.pls open with winamp and file.m3u open with wmp.

  7. Lithium said on February 10, 2017 at 11:10 am

    2017 still kicking on Windows 7
    Thx a ton

  8. Dennis said on April 18, 2017 at 4:05 am

    Hey, even i can do it, i stumbled through it and it works great! The only instruction advice i will add as i had to figure this out, when the wmp box opens that says save or open the bar on right says wmp click that drop down and select “open pls in wmp” once you do that it will work . Took me quite some time to discover that as i am no computer expert by any means. Having said that, previously i had downloaded codec packages and something about aac. None did any good. This rocks, i listen to a lot of internet radio and a number of them have dropped flash player and getting wmp to work had been a nightmare. So many thanks for this great solution to another problem that Micro-Hell will not even address. Peace- Out

  9. stephen marshall said on March 19, 2019 at 2:07 am

    openplsinwmp came in a zip file. I unpacked it, and didn’t find anything that looks like an executable, and even the files in the “doc” folder were in a format windows didn’t recognize. I’m not stupid. you said it would open effortlessly. It didn’t. This a rabbit hole I don’t want to go down.

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.