 Applications and variants       Doubling echo Doubling echo is produced by adding short delay to a recorded sound.
<meaning-changed>  Applications and variants       Doubling echo Doubling echo is produced by adding short delay to a recorded sound.
 Applications and variants Delay effects typically allow users to adjust the amount of feedback. By feeding some of the delayed audio back into the buffer, multiple repeats of the audio play back (feedback). At low feedback settings, each repeat fades in volume. High levels of feedback can cause the level of the output to rapidly increase (self-oscillation), becoming louder and louder; this may be managed with limiters. The delayed signal may be treated separately from the input audio - for example, with an equalizer. Doubling echo Doubling echo is produced by adding short delay to a recorded sound.