| Warning |
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DRAFT VERISON !! |
AD: C69 is replaced with a .1u cap, and its (+) terminal is tapped to a SPDT on-off-on switch that will connect to (+) terminals on either a 10u or 1u cap in parallel with the .1u cap.
ADSR: ADSR C1, C2 are replaced with a single .22u cap, and its (+) terminal is tapped to a SPDT on-off-on switch that will connect to (+) terminals on either a 22u or 2.2u cap in parallel with the .22u cap. These cap values provide a wide range, the range can be contracted by adjusting the value of the smallest and largest cap in the trio. The tricky part is building a little tree with the three caps, all their (-) terminals common, and putting that into the original cap location. A simplified (possibly more elegant) version of this might address only the specific deficiencies (AD being too long, ADSR being too short).
original TTSH
Modded TTSH ADSR (C1 replaced with 0.22uF , C2 removed)
In this case you would use an on-on switch, and only add one cap. In the AD, you would replace the original cap with a smaller one, and add the original 1u cap in parallel.
In the ADSR you would replace one of the two caps with 2.2u, install the 22u cap in the second location, and use the switch to engage the larger cap.