As far as I know, OD an amp is having it on dist channel and turning the volume up. And an OD pedal has some kinda functions that make the amp go into overdrive w/o having to increase the volume as much.
Am I correct? Are there anything else I should know?
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What an Overdrive basically is, is driving the amp harder than it should go. It usually results in more gain, sustain, and occasionally volume.
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