Roland RE-20 用户手册

下载
页码 24
 
19
 
About the Roland SPACE ECHO RE-201
 
The Roland SPACE ECHO RE-201 is a reverb-equipped tape echo that debuted in 1974.
 
About the Configuration of the Tape Echo/Reverb 
 
The tape echo section features an erase head, record head, and three playback heads 
arranged sequentially at equal intervals, such that a sound is played back three times 
at equal intervals.
 The three playback heads are switched with the MODE SELECTOR knob, making it 
possible to create different variations (patterns) of echo intervals.
The reverb section is equipped with a spring reverb. The reverb signal path is 
connected in parallel to the tape echo section.
 
Changing of the Echo Sound’s Pitch When 
REPEAT RATE is Changed
 
Turning the REPEAT RATE knob to the right (clockwise) gradually increases the tape 
speed. As this happens, sounds are played back more closely together, and the pitch 
begins to rise.
Simultaneously, the density of the sounds during recording gradually decreases, so 
when those sounds reach the playback heads, the pitches that were raised then begin 
to fall.
 
Oscillation in the Tape Speed
 
Even without any change in the REPEAT RATE knob setting, the tape speed is always 
changing slightly due to the resistance from mechanical friction, tape slippage, and 
other factors.
This creates oscillations in the pitch of each of the three echo sounds, automatically 
producing the RE-201’s characteristic chorus effect.
 
About the Change in Sound Quality with Magnetic Saturation
 
Due to magnetic saturation, recording to and playing back from tape produces a sense 
of compression in the sound, giving it a characteristic warmth that is unique to tape.
In addition, the sonic quality of playback and recording also changes with the change 
in tape speed.
 
About the Reverb
 
The RE-201’s reverb section includes three springs arranged in a “Z” formation. The 
vibration of each spring influences the motion of the others to produce the reverb’s 
characteristic sound.
RE-20_e.book 19 ページ 2007年6月8日 金曜日 午後4時32分