Reverb. The effect has been used extensively in the music industry for decades. The unique, distinctive quality it can give your music is remarkable. But there are tons of reverb pedals on the market, and it can be difficult to decide which is the best for you. The Source Audio True Spring Reverb is the answer.Enjoy the most complete reverb sound ever. Designers of the True Spring have put years of research into ensuring that this is a pedal that captures every nuance and quality of high-clarity reverb. Experiment with your sound endlessly. A free app lets you intricately edit your reverb voices and then save them into the pedal. Create your perfect sound.