Файл: E-mu E 6400 EOS 4.0 manual.pdf

O Use larger crossfade loop sizes with complex sounds; shorter sizes when you simply want to mask a slight tick in the loop.

You cannot Undo loop points.

5.Press the Auto Correlate function key (F5) if you want help in finding likely loop points.

6.Press OK when you have a good loop. The following screen appears with several more looping tools.

•Compress Loop: Compression “evens out” the level changes during the loop portion which are perceived as amplitude modulation or “breathing” effects.

•Truncate: (After Loop) Discards any information after the loop end point in order to conserve memory.

•Crossfade Size: (Crossfade Loop) This function smoothly crossfades between the waves on either side of the loop so that the waveform at the loop point is identical. Since Crossfade Looping alters the sound data, you may notice timbral or amplitude variations. A size of 0.00 disables crossfade looping.

Crossfade Looping

•Crossfade Type - Equal Power: This is a weighted crossfade that produces no apparent level shift, and is the commonly used mode.

•Crossfade Type - Linear: This provides a straight mathematical crossfade. Use linear mode with samples whose splice points are already close to optimum, such as a sample that has already been auto correlated.

7.Press OK to perform the operations or continue. Press Cancel to cancel the loop operation.

_ Samples imported from the EIII having forwards/ backwards loops will play back on the Ultra. However, the loop data will be permanently modified to contain the forwards/backwards sound data. Changing the loop points on imported forwards/ backwards loops could have unpredictable results and is not recommended.

Loop Type

This submenu allows you to turn looping On or Off and to select whether the Loop in Release function is On or Off.

v To Set the Loop Type

1.Press the Sample Edit key. The LED illuminates and the main sample edit screen appears.

2.Select the sample that you want to loop using the Data Entry Control, INC/DEC keys, or the numeric keypad.

3.Press the Tools 1 function key (F2). Another row of function keys appears.

4.Press the LpType function key (F2). The following screen appears.

5.Select Loop Type as either On or Off.

•Off: The loop is disabled and the sample plays as recorded.

•On: The sample plays normally until it reaches the end of the loop. It then jumps back to the start point and replays through the loop. Upon reaching the loop end, it again replays the loop. This looping process continues for as long as the key is pressed.

6.Select whether Loop in Release is On or Off.

•Off: Lifting your finger off a key initiates the release phase of the amplifier envelope in the voice. If Loop in Release is off, the loop will not continue during the release phase. The portion of the sample after the loop will be played during release. The signal may cut off abruptly after you remove your fingers from the keys if the sample has been truncated after the loop.

•On: With Loop in Release on, the loop keeps playing—even after you lift your finger off the key—for the duration of the amplifier envelope release.

7.Press OK to enter the new values or Cancel to cancel your changes.

O Try offsetting the pitch of a copied sample by a few cents, then combine it with the original for flange and chorus effects.

If the sample is stereo, a pop up dialog box will ask you to select left, right or both sides.

O Re-tuning pitch downward increases the sample size. Re-tuning pitch upwards decreases the sample size.

6 - Sample Edit

Digital Tuning

Digital Tuning

Digital Tuning allows you to change the pitch of a sound in order to splice or combine it with another sound of a different pitch. If a sample is slightly out of tune, it is usually better to fix the sample once and for all, rather than re-tuning the sample every time it is placed on the keyboard.

•Filtering - Digital Tuning utilizes a low pass filter to prevent aliasing in the output. Filtering is automatically applied depending on the amount of tuning, but the three ranges allow you to have more control over the output.

•Crunchy - Least amount of filtering - High frequency content retained, but sample may contain audible artifacts.

•Smooth - Medium amount of lowpass filtering.

•Creamy - Maximum amount of lowpass filtering - Some high frequencies will be removed.

v To Retune a Sample

1.Press the Sample Edit key. The LED illuminates and the main sample edit screen appears.

2.Select the sample that you want to tune using the Data Entry Control, INC/DEC keys, or the numeric keypad.

3.Press the Tools 1 function key (F1). Another row of function keys appears.

4.Press the DigTune function key (F3). The following screen appears.

5.Enter the tuning amount in cents using the Data Entry Control, or INC/DEC keys. The new sample size and new loop size will be calculated.

6.Press OK to retune the sample or Cancel to cancel the operation.

O If you are not happy with the resulting conversion or want to compare before and after, press the Undo function key (F6).

6 - Sample Edit

Sample Calculator

•Coarse/Fine - Fast forward through the values using Coarse, then switch to Fine for single digit editing.

6.Set the low pass filter to the desired range: Crunchy, Smooth or Creamy.

7.Press OK to change the sample rate or Cancel to cancel the operation.

Sample Calculator

Use the sample calculator to compute sample rates for perfect single cycle loops. If the single-cycle value shown is not an integer number, adjust the sample rate value so that it does become an integer number, then use the Sample Rate Convert function to convert the sample to the new rate.

v To Use the Sample Calculator:

1.Press the Sample Edit key. The LED illuminates and the main sample edit screen appears.

2.Select the sample that you want to process using the Data Entry Control, INC/DEC keys, or the numeric keypad.

3.Press the Tools 1 function key (F2). Another row of function keys appears.

4.Press the Calc function key (F6). The following screen appears

5.Select the known pitch of the sample using the keyboard, INC/DEC keys or the Data Entry Control.

6.Select the sample rate using the INC/DEC keys or the Data Entry Control. The number of samples for a single-cycle loop changes for each sample rate.

•Coarse/Fine - Fast forward through the values using Coarse, then switch to Fine for single digit editing.

•Frequency Indicator - Displays the fundamental frequency of the selected note.

7.Press OK or Cancel to return to the Sample Edit screen.

_ If the sample sounds clipped after DC Filtering, Undo, then attenuate the sample by 2 dB. Next, DC Filter the sample and Normalize using Change Gain.

Tools 2

This submodule contains the basic digital processing tools listed below.

DC Filter: Removes the DC component from a sample, centering the waveform around the zero axis.

Swap L/R: Swaps the left and right sides of a stereo sample

Stereo<->Mono Conversion: Converts stereo samples to mono and viceversa.

Reverse Sample: Reverses all or part of a sample.

Sample Integrity: Remedies looping problems in imported samples.

DC Filter

Removes the DC component from a sample, centering the waveform around the zero axis. The positive and negative peaks of the sample are expressed in 16 bit samples. Full scale for a 16-bit sample is ±32767. Use the peak values to see how close you are to full scale. If one of the peaks is too close to 32767, DC Filtering may cause the signal to clip. Mean is the DC bias present in the sample. The lower the number, the less bias is present.

v To DC Filter:

1.Press the Sample Edit key. The LED illuminates and the main sample edit screen appears.

2.Select the sample that you want to DC Filter using the Data Entry Control, INC/DEC keys, or the numeric keypad.

3.Press the Tools 2 function key (F3). A second row of function keys appears.

4.Press the DC Filter function key (F1). The following screen appears.