Boss RC-20 Owner's Manual page 13

1. Turn the PHRASE SELECT knob to select an empty phrase track 1–10
(PHRASE USED indicator extinguished).
No further phrases can be recorded if there is no empty phrase track, or if the
MEMORY FULL indicator is lit. In this case, you will have to erase unnecessary
phrases (p. 23).
2. Press the MODE button to select the recording method.
• NORMAL+FLAT AMP SIMULATE
Apply the Flat Amp Simulator effect to the sound being recorded.
• CENTER CANCEL+FLAT AMP SIMULATE
Sounds localized at the center will be erased, and then the Flat Amp Simulator
effect will be applied to the sound being recorded.
* If an effect such as reverb has been applied to the sounds localized at the center, it may not
be possible to erase the sound completely.
• NORMAL
The performance from the CD or MD will be recorded as is.
• CENTER CANCEL
Sounds localized at the center (such as vocals or guitar solo) will be erased from
the sound being recorded.
The Flat Amp Simulator effect
Guitar amps are designed with a frequency response that is optimized for guitar
playing. For this reason, when a phrase recorded from CD or MD is played back
through a guitar amp, the low-frequency and high-frequency ranges will be
emphasized in comparison to the mid-range. The Flat Amp Simulator compensates
the frequency response during recording, so that the recorded (i.e., non-guitar)
performance will sound correct when played through your guitar amp.
3. While playing back the CD/MD, use the volume control of the CD/MD player to
adjust the recording level.
Adjust the volume so that the PEAK indicator lights occasionally.
When you have finished adjusting the volume, stop the CD/MD player for now,
and put it in playback-ready mode.
4. Set the tempo by pressing the TAP TEMPO button or the right pedal several
times in time with the tempo of the phrase you wish to record.
* For details on setting the tempo, refer to "Setting the tempo" (p. 24).
* If you are recording a phrase of a time signature other than 4/4, you must also specify the
time signature (p. 25).
5. If you want recording to begin the moment the performance begins, turn the
AUTO START button on (indicator lit).
Recording a phrase from CD/MD to create a phrase loop
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