The emergence of oscillations during the silicon electrodissolution has often been tackled using a framework where the global oscillatory signal is seen as the outcome of a synchronization of self-oscillatory microdomains with a certain frequency distribution. It is the main objective of this publication to reject this widely adopted modeling framework by showing that it is incompatible with spatially resolved experiments. Instead, we propose a fundamentally different modeling framework where the system is seen as an oscillatory medium. (C) 2016 Published by Elsevier Ltd.