In traditional audio speedup, voices and instruments are raised in pitch also, creating a chipmunk-like quality. Edit audio speeds to your likingĪudio files contain more than just music, and for those that contain podcasts, audiobook or lectures, Audio Speed Changer Pro can help users listen to the quicker without affecting the speaker’s voice. It’s capable of handling a variety of different files, such as MP#, WMA, WAV and more, and edits to audio can be done in batches for ease of use. In essence, this means that you can slow down or speed up files that contain singing or talking without affecting the vocalist’s natural voice. I want to thank all of their authors for making my life easier, and projects like this possible.Ĭompiled using Emscripten Source Code LicenseĬontactYou can find my contact details on 29a.ch/about.Speed up or slow down your audio for freeĪudio Speed Changer Pro is a free program that allows its users to change the speed of individual audio files without altering the pitch. This software was built using the following open source components. Thorsten Karrer, Eric Lee, and Jan BorchersĬomputing Group, RWTH Aachen University Open Source Libraries PhaVoRIT: A Phase Vocoder for Real-Time Interactive Time-Stretching In IEEE Transactions on Speech and Audio Processing, Volume 7, pp. Improved phase vocoder time-scale modification of audio. These papers inspired the design of the algorithms that power TimeStretch Player.īut it's not using an exact implementation of either. Fixed a bug that caused audio playback to stop slightly (1 buffer) prematurely.Added support for mono files by converting them to stereo.Made limiter a bit more agressive to prevent clipping.Yes you can do that using the save menu item in the top bar. Offline mode is not working with your current setup. You can open this application even if you are offline. Yes you can if you are using a modern web browser like firefox or chrome.

Safari on iOS does not allow you to open audio files so while it might work in theory Safari on a mac works too but is in my expirience more buggy. If you are using Android I suggest chrome, firefox seems to be too slow on Android. So those are the browsers that I recommend. I develop using Google Chrome and Firefox Which browsers/devices are supported/recommended? Why does the player stutter when it is running in the background?īrowsers throttle websites that are running in the background to try to save power. Likely because the file type or codec is not supported. It means that your browser could not decode the audio file selected, I get a DECODING ERROR what does this mean? I also wrote a similar tool for linux called play it slowly. What other similar software can you recommend? There is a table that lists the supported by file types on. Support for MP4, and OGG depends on the browser. MP3 seems to be decoded by most browsers. You have problems with dropouts or crackling noises playback you can try to lower the quality of the time stretching the settings menu. This is helpful for practicing but if you don't like this behavior you The player will remember the settings you used for every file. Which will set the endpoint to the current playback position. To select the start and endpoints of the loop you can drag the handles atĪnother way to select the loop endpoints is to use the buttons To loop a region of the track enable loop mode by clicking on the loop This will change the pitch in semitone increments.įor finer adjustments you can use the tune dial which changes the pitch in cents. If you want to shift the pitch of the track turn the pitch dial. The more stretch, the slower the playback will be. To change the speed of the playback without affecting the pitch simply turn the stretch dial. To jump to a specific location either drag the yellow play head with your mouse or click on location in the wave form. To play the track you can simply press the play button or hit the space key on your keyboard. Once it's done it will display you the waveform of the track. On Android you need to select an App that can provide an audio file for instance google drive.Īfter you have selected the file time stretch player will need a few seconds to process it. You can do this by clicking on 'Open Track' or dragging and dropping a file onto the page. The supported file types depend on your browser but mp3 and ogg should generally work. You can read more about it in this blog post. This makes it a great tool for practicing or transcribing music. TimeStretch Player is a free online audio player that allows you to loop, speed up, slow down and pitch shift sections of an audio file. You can use this application while offline.

Music speed changer