Ogg Vorbis Export Options
From Audacity Development Manual
Audacity does not yet support use of the Speex low bit rate voice codec within Ogg.
- Accessed by: then choosing Ogg Vorbis Files from the Save as type dropdown menu.
- Also accessed by: then choosing Ogg Vorbis Files from the Save as type dropdown menu. In this case the options dialog will appear in the center of the Export Multiple dialog.
Ogg Vorbis Export Setup
- Quality: Choose a quality setting from 0 (lowest) to 10 (best). The current quality setting is displayed in the center of the slider. The default level of 5 typically produces a file of about the same size as Audacity's default 128 kbps MP3 encoding, but of higher quality. Higher OGG quality settings mean a larger file size, because a higher overall bit rate will be used.
This means that in order to maintain consistent quality throughout a track, a higher bit rate will be used when encoding a complex piece of audio (such as a full orchestral passage) than when encoding a solo voice or instrument. A recording which has more complex audio will produce a larger file. Increasing the sample rate in Selection Toolbar will increase the bit rate and so the file size (and vice versa).