So without further ado, let’s head into Audacity to look at the settings available for exporting MP3. What this means is that you will have different priorities depending on what your sound mix consists of.
With spoken word, you can get away with a much lower bitrate without your listeners noticing any difference. Both versions are built from the Audacity-2.2. On the other hand, when I use audacity built on the same machine but with the audacity-freeworld patches (that make audacity link against various audio libraries), there’s no noise. Music has more complex data and is a stereo track, which means it will need a higher bitrate to sound ‘good,’ while a podcast, with just a voice in mono, is not as complex. I noticed something interesting: when I use audacity built from git (using the instructions from the INSTALL file), there’s some extra noise when reading mp3 files. If you are working with music, you generally need a higher bitrate than spoken word recordings, such as voiceovers or podcasts. You may have the greatest-sounding recording of all time, but if you convert it to a low bitrate, the sound will be poor.Īnd conversely, if you are using a $2 microphone and you record in your bathroom, it will not matter how many bitrates you throw on the MP3 to get a good result. In general, higher bitrates result in higher quality audio. If the podcast contains a lot of music you may prefer to use stereo, but higher bit-rates will probably be required (bigger file size).Ħ4 kbps CBR mono can give reasonable quality for voice if you are wanting to minimise the file size.ĩ6 kbps CBR mono can give excellent quality for voice.ġ28 kbps CBR stereo can give reasonable quality where stereo is required.ġ92 kbps CBR stereo can give very good quality where stereo is required.Ģ56 kbps VBR stereo can give excellent quality stereo music, though not recommended for streaming.The quantity of data that gets converted into audio is known as bitrate. For voice only podcasts, mono is usually preferred as you can achieve better sound quality with less data. The choice of mono/stereo depends on the type of podcast. While this is a good choice for stereo music, it is not generally recommended for Podcasts.įor podcasts, “CBR” (constant bit-rate) is recommended, and not “VBR” (variable bit-rate). The default MP3 encoding options in the current version of Audacity are 170 - 210 kbps VBR (preset “Standard”). Whether you use iTunes, Audacity or any other application for encoding your MP3s, it is essential that you select appropriate settings for the MP3 encoding to suit your needs. The argument is that type of mp3 encoding found in the iTunes app is compatible with most anything while mp3 exports from Audacity use a conversion protocol that may, now and then, not be readable by some replay device
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