Re-amping is a production technique that is both a creative method used to inspire new synth sounds and ideas, as well as a way to bring new life to a synth track that may be letting down the rest of your mix.
Synthsizers come in every form, sound shape and tone imaginable, if you can think it it probably exists. Unfortunately, some of their wonderful sounds and characteristics can be diminished during recording processes, or not sit well in the mix with other tracks and instruments.
The practice of re-amping involves taking the already recorded signal, routing it back out of a console or DAW and running it through external processing, before finally returning it into the editing or mixing environment. This type of processing provides opportunity to alter audio signals to enhance musicality, definition and musical identity, and add audio effects to an existing synth recording.
Synth tracks can be processed through different types of amplifiers, speakers and effects units in addition to introducing other audio effects such as distortion, sonic filters, compression and harsh EQ for create effects. Common re-amping objectives may include musically motivated amplifier distortion, capturing room tone and resonance, applying effects and adding depth to stereo imaging.
This type of audio signal processing has very few boundaries: it can be used to both improve quality and musicality of any instrument track, as well as for creative processing and modifying tone.