Introduction

Mapping A1 becomes a simple task once the location for A2 has been established. The process involves tuning A1 as a 6:3 octave relative to A2, 3.0 cents wide.

Procedure for Mapping A1

  1. Set the SAT in Tune Mode: Begin by setting the SAT to (E4 @ x.x). Play A2 and use the cents buttons to stop the lights.
  2. Read the Cents Setting: Observe the cents value displayed on the SAT.
  3. To calculate the New Setting for A1: Subtract 3.0 cents from the displayed value. Tune A1 to this new setting.

By following these steps, A1 will be tuned as a 3.0 cent wide 6:3 octave from A2.

Example Calculation

Suppose the SAT display after step 2 reads (E4 @ -1.0). Subtracting 3.0 cents gives a setting of (E4 @ -4.0). This value, representing the 6th Partial number for A1, should be recorded for future reference, such as when mapping A0.

Important Values to Record

  • The location of the 6th Partial
  • The location of the 4th Partial

Listening and Adjusting

After tuning A1 to (E4 @ -4.0), you will have established a 3.0 cent wide A1/A2 6:3 octave. It is recommended to listen, check it, and make any slight adjustments necessary. In most cases, if the mapping of the prime and sub prime is accurate, this approach will be successful nearly every time.

Alternative Approaches

Any method may be used to determine the location for A1. But regardless of the approach, it is essential to measure A1’s location by its 4th partial.

Recording the 4th Partial

The LC spreadsheet relies on the 4th partials for the notes from A0 to A4. Although A1 is tuned using its 6th partial, the 4th partial location must be measured and recorded, so it can be entered into the LC spreadsheet for subsequent tuning calculations.