Reamping is a process often use in multitrack recording in which a recorded signal is routed back out of the editing environment and run through external processing or reverb chamber. Originally, the technique was used mostly for guitars: it facilitates a separation of guitar playing from guitar amplifier processing — a previously recorded audio program is played back and re-recorded at a later time for the purpose of adding effects, ambience, or modified tonality. The technique has since evolved to include many other applications. Re-amping can also be applied to other instruments and program, such as recorded drums, synthesizers, and virtual instruments.