If you want to reduce the size of your audio files without compromising the quality, you might want to convert them to 48kbps m4a format. M4A is an audio file format that is very similar to MP4, but it does not contain videos like MP4. It is a proprietary file format of Apple that uses MPEG-4 codec to contain audio files. One of the advantages of m4a format is that it supports variable bit rate encoding, which means that the file size can be adjusted according to the quality and complexity of the audio data.
There are many online and offline tools that can help you convert your audio files to 48kbps m4a format. Here are some of the steps you can follow:
Choose an audio converter that supports m4a format. You can use online tools like CloudConvert , Online Audio Converter , or Motionbox , or you can download and install software like iTunes, VLC Media Player, or Audacity.
Upload or select your audio file that you want to convert. You can choose from various formats like MP3, WAV, OGG, FLAC, etc.
Select m4a as your output format and adjust the settings according to your preference. You can choose the bit rate, sample rate, channels, and codec of your output file. To get a 48kbps m4a file, you need to set the bit rate to 48 kbps.
Start the conversion process and wait for it to finish. Depending on the size and quality of your input file, the conversion time may vary.
Download or save your converted file to your device or cloud storage. You can also share it via email or social media.
By following these steps, you can easily convert your audio files to 48kbps m4a format and save some storage space on your device. However, you should also be aware that converting audio files may result in some loss of quality or metadata. Therefore, you should always keep a backup of your original files before converting them.
If you want to know how much space you can save by converting your audio files to 48kbps m4a format, you can use a simple formula to calculate the file size. The formula is:
File size (in MB) = Bit rate (in kbps) x Duration (in seconds) / 8 / 1024
For example, if you have a 5-minute MP3 file with a bit rate of 320 kbps, its file size would be:
File size (in MB) = 320 x 300 / 8 / 1024 = 11.72 MB
If you convert it to a 48kbps m4a file, its file size would be:
File size (in MB) = 48 x 300 / 8 / 1024 = 1.76 MB
As you can see, you can save about 10 MB of space by converting your MP3 file to a 48kbps m4a file.
If you have a specific file size requirement for your audio files, you can also use this formula to find out the bit rate that you need to use for your output format. For example, if you want your audio file to be no more than 5 MB in size, and its duration is 5 minutes, you can use this formula to find out the bit rate:
Bit rate (in kbps) = File size (in MB) x 8 x 1024 / Duration (in seconds)
In this case, the bit rate would be:
Bit rate (in kbps) = 5 x 8 x 1024 / 300 = 136.53 kbps
This means that you need to set your output format to have a bit rate of about 136 k