I have been using the Edirol SD20 for live use for a number of years but lately I hear distortion in the bass. The output of the SD20 goes to a Mackie mixer. The only way to get rid of the distortion is to turn down the bass to the point where it can hardly be heard. The drummer syncs to the bass so if he can't hear it well...there's a problem. Could this be a hardware issue with the SD20? I have tried using the sound card in the laptop and sent the phones out to the mixer ad the bass distortion disappeared but the other instruments don't sound the same anymore.
Any suggestions?
Thanks.
Robert