V0 is the highest quality VBR preset and V9 is the lowest quality VBR preset. When one refers to the 'bitrate' of a VBR file, they are talking about the mean bitrate (in kilobits per second) for the whole song, which is calculated by dividing the filesize by the duration. The more music data necessary to encode, the larger the resulting file will be. The better the preset, the larger the resulting file will be.
The resulting filesize for a VBR encode depends on two factors: the preset selected, and the music itself. Since VBR files target a certain quality instead of a certain bitrate, exact VBR file sizes are more unpredictable.
#REDACTED TRACKER REDDIT 320KBPS#
Every second can range from 0 to 320kbps (the ceiling for MP3) based on the preset and the audio data being encoded. For example, a second of silence would receive much fewer bits than a second of loud, blaring music. This means that every second of the file has a different number of bits that depends on how complex the sound is at that second. When encoding a variable bitrate (VBR) file, the user (you) chooses a preset quality and LAME targets that quality, letting the bitrate vary throughout the entire file. This also means that CBR files have a predictable file size. Because silence is given the same number of bits as more complex sounds, CBR files are larger than VBR and ABR files of the same quality.
Every second in a CBR file has the same quality. This means that every second in the file has the same number of bits, no matter how simple or complex the sound is. When encoding a constant bitrate (CBR) file, the user (you) chooses a preset bitrate and LAME targets that bitrate throughout the entire file. RED recommends LAME as an MP3 encoder because it is open source, customizable, and outputs high quality MP3 files. The resulting MP3 file can have a constant, variable, or average bitrate. LAME Ain't An MP3 Encoder (LAME) is an encoder that converts and compresses any input audio file and outputs an MP3 file.
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