As you probably know, mono audio only plays through one channel. On the other hand, stereo audio plays through two independent channels. If you have a mono audio, its quality will be much lower. But don't worry, because we are going to present online converters from mono to stereo and from stereo to mono. These tools will not add any effect to the song; they will only separate the track into different audio channels. All the utilities we list work in a similar way, but in some cases you can convert the mono track to 5.1 stereo.
Online-Audio-Converter.com
Online-Audio-Converter.com is a website that lets you store audio files locally or through Google Drive, Dropbox, or a URL. The file upload size limit is 2GB (more than enough). After uploading the file, you'll need to click "Advanced options" and from there change the number of channels. You can also customize: the quality of the audio, sampling frequency, the bit rate, add audio effects and change the output format of the file. Now, you just have to click "Convert" and that's it!
Online-Converting.com
Online-Converting.com is another very good website to convert your file from mono to stereo (and vice versa). The service only allows local file uploads. However, there is no limit on the number and weight of audio files uploaded to the site. But before uploading the song, you'll have to change the settings (they are at the bottom) of frequency and the number of channels (mono or stereo). Then upload the track and the conversion will start automatically.
Online-Convert.com
Online-Convert.com is a very good tool to convert from mono to stereo (and vice versa). From the site you can upload files from your computer or from your Google Drive, Dropbox account, or via a URL. The service has a 100 MB upload limit (per file) and you can perform four simultaneous conversions. To perform the conversion, first you'll have to select the output format and then select the number of channels, among other settings.
Convertio.co
Convertio.co is a website that has more than 1200 converters. Among these services, we will find the change of channels (mono to stereo and vice versa). From its interface you can upload local files or via Google Drive, Dropbox, and a URL. You can only do two simultaneous conversions, each file cannot exceed 100 MB, and you only have 10 minutes of conversion per day. In other words, it's not the best option.
CoolUtils.com
We'll finish with CoolUtils.com. To change the number of channels, first you'll have to upload the file (local or from the cloud), then select a format converter, and finally change the number of channels (mono or stereo and vice versa). You just have to click "Download Converted File" to download the converted file. The platform does not offer batch conversion service and you can only upload tracks with a maximum weight of 100 MB.
With these five free websites to change the channels of an audio file, you can reduce or increase the number of channels of a song.
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