LSDj "envelope".

One channel of LSDj controles a filter that is connected to the other channel.. The volume sets the filter amount.
This is gives quite nice controle over the filter directly from LSDj itself.. of cource one channel is sacrificed.. but not realy.. because it can still sound quite good when both channels are used at the same time

Below are some tracks recorded with this mod.

The wave form that is used to controle the filter, can also be heard one the audio, depending in the selected pitch and pulse width settings. When high pitches are used this effects is not so much there.. (this can probably be removed by adding a envelope demodulator circuit, if wanted).

When using this circuit my bleepbloop cart died, so now i am using one of my bung carts.. The bung still works, but the bleepbloop might have died because of this circuit, time will tell.. Because now in Rev1 the voltage is changed from 6V (direct from batterys)to 5V from gameboys circuit board (so now the power to the circuit is also disconnected when the power switch is turned off).