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Time Stretch - Roland SP-808 Manual

Groove sampler
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Time Stretch

Stretching a sample will allow you to change the tempo or BPM of the sample without changing the
pitch. This is extremely useful when you wish to match the tempo of one sample to another or
when you want to change the tempo of a sample to match the tempo of a tune you're working on.
Use the following procedure:
1. Hold SHIFT and press STRETCH.
2. CURSOR to SOURCE and press the pad you wish to change.
3. CURSOR to TO and press the pad you wish to write the new sample to.
4. CURSOR to NewBPM and rotate the VALUE/TIME dial to select the desired BPM and press
ENTER/YES.
You can also use RATIO to determine your new tempo. Here's an equation you can use to get the
ratio:
(ORIGINAL TEMPO / NEW TEMPO) x 100 = RATIO
1. Divide the original tempo by the new tempo. For example, if the original tempo is 100 BPM
and you want to change it to 110 BPM, your outcome would be .9090.
2. Multiply your outcome by 100. In our example, our result would be 90.9.
3. CURSOR down to Ratio and use the VALUE/TIME dial to enter your result and press
ENTER/YES.
4. Press PLAY to return to the main play screen and press the pad to hear the results.
If you want to match the tempo of another pad:
1. Hold SHIFT and press STRETCH.
2. CURSOR to SOURCE and press the pad you wish to change.
3. CURSOR to TO and press the pad you wish to write the new sample to.
4. CURSOR up to Match/w and press the pad you wish to match.
5. CURSOR down to TYPE and rotate the VALUE/TIME dial to select "TEMPO."
6. Press ENTER/YES.
7. Press PLAY to return to the main play screen and press the pad to hear the results.
Pitch
Changing the pitch of a sample without changing the tempo can also be a very useful tool.
Sometimes, you may already have the correct tempo, but the pitch just doesn't fit with the tune
your working on. For example, you might have a horn hit that needs to be a half step higher than
when it was originally sampled. Use the following procedure to change the pitch of a sample:
1. Hold SHIFT and press PITCH.
2. Press the pad or rotate the VALUE/TIME dial to select the SOURCE sample you want to
change.
3. CURSOR to TO and press the pad you wish to write the new sample to.
4. CURSOR to GRADE and rotate the VALUE/TIME dial to select the desired grade (1-5) of the
effect. Higher numbers result in better fidelity, but may affect the rhythm of the sample.
5. CURSOR to NewPitch and rotate the VALUE/TIME dial to select the desired pitch. For
example, if you want to shift the sample a whole step up, select "2." If you want to shift it a
whole step down, select "-2" (see Fig. 5).

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