.Stut, stut, stut, stut, stut, etc. Stutterfly. AMT Electronics SY-1 has all the features of a delay pedal that modern guitarists are looking for in a small, compact case that fits easily on any pedalboard. Most delays include default time, feedback and level control. AMT recognized the need for some additional options that would greatly improve the versatility and flexibility of the pedal. The Stutterfly delay also includes an additional tone control, a mix function and a MOD adjustment. usually only found on more expensive/larger devices. Sounds great with clean and overdriven distorted guitar signals.