 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 Digital delay effects record a sample of audio and play it back. Software versions record the audio to a buffer. Digital delay may also modify the recorded sound, by reversing it, altering its pitch, or other manipulations. Some digital delays emulate the "gritty, grainy" sound of earlier delay effects. Doubling echo Doubling echo is produced by adding short delay to a recorded sound.