Sample Rate
Select the quality of encoding. The higher Sample Rate means highter quality but with a larger file size. We recommend 44100Khz - CD-audio quality.
Bitrate
Select the quality of encoding. Determines the number of bits per second. The higher bitrate means highter quality but with a larger file size. We recommend 128 Kbps.

Table 1.1: Bitrate versus sound quality

Bitrate	Bandwidth	Quality comparable to or better than
16 kbps	4.5 kHz	shortwave radio
32 kbps	7.5 kHz	AM radio
96 kbps	11 kHz	FM radio
128 kbps	16 kHz	near CD
160-180 kbps (variable bitrate)	20 kHz	perceptual transparency
256 kbps	22 kHz	studio

Max. Bitrate
VBR - variable bitrate mode. At this mode, you can get better quality with smaller file size. If you select VBR options then you must set a Max. Bitrate. The higher bitrate means highter quality but with a larger file size. We recommend 320 Kbps.
Mode
You can select Stereo, Mono, Joint Stereo and Dual channel mode. Joint Stereo - In this mode, the encoder will make use of a correlation between both channels in order to achieve higher compression. This will enhance the quality of constant bitrate recordings, and reduce the size of variable bitrate recordings. We recommend Stereo mode for best quality or Mono for low-quality wave files.
Quality
Select desired quality for MP3 encoding. Use some quality improvements. Encoding will be slower, but the result will be of higher quality. We commend Normal Quality.
VBR Quality
Select desired quality for VBR mode. This option allows you to set the Variable bit-rate option. Variable bit-rate encoding will enable dynamically determined bit-rates that depend on the music content of the current frame. This improves the overall quality of the encoded file without increasing the file size. This option sets the criteria used to determine when to increase the bit-rate for a frame. The lower the number the lower the criteria will be.
VBR
Use VBR mode. In this mode, you choose the desired quality on a sqale from 9 (lowest quality/biggest distortion) to 0 (highest quality/lowest distortion). Then encoder tries to maintain the given quality in the whole file by choosing the optimal number of bits to spend for each part of your music. The main advantage is that you are able to specify the quality level that you want to reach, but the inconvenient is that the final file size is totally unpredictible. We recommend use this mode.
Write VBR Header
Enable writing of the VBR INFO Tag on encoding. This tag includes some information about the encoding options of the file, and in VBR it lets VBR aware players correctly seek and compute playing times of VBR files. We recommend use this option
Copyright
Mark the encoded file as being copyrighted.
Original
Check this option if encoded file is original, otherwise the encoded file as being a copy.
CRC
Turn on CRC error protection. It will add a cyclic redundancy check (CRC) code in each frame, allowing to detect transmission errors that could occur on the MP3 stream. However, it takes 16 bits per frame that would otherwise be used for encoding, and then will slightly reduce the sound quality.
Private
Mark the encoded file as private use only.