Old songs using the BV-512 Vocoder in EQ mode may sound different in Reason 7.1. There was a bug in how the BV-512 Vocoder handled inputs in EQ mode. Fixing this bug caused a change in the function of the Dry/Wet knob: In older versions of Reason, the Dry/Wet knob worked in EQ mode as a level control, crossfading between the Carrier input signal and the Modulator input signal. If the Modulator source was silent, the Dry/Wet knob acted as volume knob. In Reason 7.1, the Dry/Wet knob is disabled in EQ mode. This means your old song can sound different if it contained:
• a BV-512 in EQ mode
• with both carrier and modulator input jacks connected
• and with the Dry/Wet knob set to anything else than full Wet
If these conditions are met, the sound of that channel will be slightly louder in Reason 7.1. The workaround is to lower the channel level a bit.