Loop Boundaries, was repeater question

[Mark Landman <mlandman@sonic.net>]

Evan and Benjamin-

It's true evening out the volume differences will help deal with the 
infamous loop boundary "bump" issue, you may still get some clicks, 
bumps and other artifacts that'll ruin the illusion of a seamless 
loop.

Remember even though you may have equal volume, that ever changing 
waveform you are looping probably isn't always going to match up 
nicely at these boundary points. In fact, depending on it's amplitude 
when you abruptly began sampling, and the difference when you 
abruptly stopped sampling, a wide range of clicks and thumps are 
possible. A lot of loopers do a very quick crossfade at the boundary 
to help deal with this, with varying degrees of success.

One of the Echoplex's (many) strengths is it's ability to end 
recording by going directly into overdub. If your looper can do this, 
try this: fade in your signal after you begin recording, then end 
your loop with overdub, then fade the input signal out smoothly. The 
result should be a beautifully crossfaded seamless loop.

And don't get me started on Loop IV, wow......

Best-

Mark


>the only bumps that you could be encountering (which
>i've seen people questioning concerning the repeater
>and other loop devices) are those of your own foot
>stomping.  here's a test for you to try to see if you
>still get the bumps...play a single note and let it
>ring out...while it is ringing, step on the switch to
>record your loop...then, while it is still ringing,
>press the switch that starts looping the loop...if you
>hear a bump, then it could just be that your rc-20 is
>messed up or the rc-20's in general are messed up
>
>what you should hear after creating that loop is just
>a single note droning in the background, looping, but
>not altering its sound in any way...let the note ring
>a bit before starting to record the loop so that you
>won't have a bump due to volume levels as your
>sustained note dies out.  i would try this creating a
>second or two long loop and then again perhaps with
>one a bit longer...post your results to the list or at
>least send them to me as i'm curious with what result
>you'll have.  when i was playing with an rc-20 my only
>complaints were the lack of syncability and tempo
>change and other key features...but i never
>experienced any problems with bumps in the recording,
>but have experienced bumps in loop creation by
>starting or ending the loops at the wrong time.  like
>i said, it comes with practice.
>
>hope that helps,
>e va n|s sa b
>evanmeyers@yahoo.com
>