Mission Engineering Fender SP1-TMP Expression Pedal for Fender Tone Master Pro Violas what you should see is

what you should see is a peak reading around -10dbfs but it should be louder with the plug-in engaged as compared to bypass

For their size

It is ideal for eliminating phase-related interference

Since the launch in 2010

Mission Engineering Fender SP1-TMP Expression Pedal for Fender Tone Master Pro Violas what you should see isUnlock the full potential of your Tone Master Pro with the Mission Engineering SP1 TMP expression pedal. The SP1 TMP connects to the Tone Master Pros expression and toe switch inputs allowing variable control of multiple amp and effect parameters in real time. The integrated toe switch can be used to engage and disengage effects without the need of additional hardware. The SP1 TMP is finished in black and metallic gray to coordinate with Tone Master