Sub Tones are used by the S-50 to conserve memory. A Sub Tone allows you to share the same sample data between two different Tones. You can edit sample information on a Sub Tone without affecting the original Tone. Since Sub Tones read the waveform data of an original Tone, the original waveform must be in memory along with the Sub Tone. Use the following procedure to create a Sub Tone:

1. Load the desired Tone(s) into the S-50's memory (as described previously).
2. Press EDIT MODE followed by P3 to display the Tone PRM page.
3. Use the ALPHA DIAL to select an empty Tone location.
4. CURSOR to Original Tone and use the ALPHA DIAL to select an Original Tone containing the waveform data that you wish to use. A number at the top of the Tone PRM page will be displayed next to "Sub." This number refers to the number of the original Tone for which the Sub Tone is borrowing its waveform data.
You have now created a Sub Tone. You can edit, name, and use the Sub Tone in any Patch as long as the original Tone is in the memory of the S-50.