The multi-effects pedal has now gone from an unappreciated device to a very well-appreciated device. All this is owed to the presence of the new and strong processors with DSP capabilities. You can now produce great effects and premium amp simulations with excellent expressive sounds to your audience as a guitarist.
You need the best in-ear monitors for singers, not only as a musician or performer on big stages. Singing requires paying attention to your lyrics and flow. But often, many musicians while performing get disturbed by the loud music or the noise from the crowd chanting their name or singing along.