Well basically, when i plugged my Metal Muff in, it sounded nothing like it yesterday!

I need to have the distortion all the way up to achieve the sounds i'd normaly have at 1/4 distortion!

Also, with the distortion full, theres a strange echoey sound!

I've tried it with a different guitar, leads and amp and its still the same...

Anyone know what the problem might be?

Battery? Just sayin...
Jackson DXMG
B-52 AT100
Marshall 1960A
Pedals and stuff