10.3.5 SAMPLE Group

Use these jobs to set a sample’s start or end point, to modify the sample waveform in any of various ways, or to delete a waveform.

Several of these jobs (the TRIM, FREQ CONVERT, BIT CONVERT, and DELETE jobs) can be used to increase the amount of memory available for additional sample recording.

These jobs can only be used on sample tracks that already contain recorded samples.

What The Jobs Do

START POINT Sets the sample’s start point (the point on the waveform from which playback begins).

END POINT Sets the sample’s end point (the point on the waveform at which playback ends).

PROCESS These jobs perform various types of processing on the sample’s waveform.

DELETE Deletes the sample (together with all sequence data) from the selected sample track.

SAMPLE START POINTSAMPLE END POINT

Use to: Adjust the start point and end point for sample playback, without changing the waveform itself.

Explanation

As explained elsewhere in this manual, a sample consists of a waveform, together with start-point and end-point values. You can adjust the start point and end point to select the span of the waveform that is played out. This makes it possible to eliminate unnecessary material recorded at the start and end of the waveform. It also makes it possible to adjust the sample to get the attack and length that you need. You will find that even small adjustments to the start and end points (the start point in particular) can have a significant affect on the sound.

Note that adjusting the start and end points simply changes the area of the waveform that is played out; the unplayed waveform data remains in memory unless you delete it using the SAMPLE PROCESS TRIM job (→ p.262).

The start and end point values themselves are in units of frames, where each frame represents a single reading along the waveform. Samples recorded at 44.1 kHz frequency will consist of approximately 44,100 frames per second; reducing the difference between the start and end points by 100 units would therefore reduce the playback time by 1/441 second (assuming playback at the sample’s original speed).

To eliminate the possibility of an unpleasant clicking effect, the SU700 always forces the start and end points to the nearest zero-cross point on the waveform (the nearest location at which the waveform crosses the zero-amplitude line.)

CHAPTER 10

Chapter 10 Jobs

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