Sidechain

[Heikki]

sidechain1.jpg (1.41 MiB) Viewed 11129 times

sidechain2.jpg (1.35 MiB) Viewed 11129 times

sidechain3.jpg (1.39 MiB) Viewed 11129 times

sidechain4.jpg (1.43 MiB) Viewed 11129 times

Schematic

sidechain.pdf

(22.7 KiB) Downloaded 173 times

BOM

sidechainBOM.pdf

(14.35 KiB) Downloaded 172 times

sidechainBOM.ods

(14.91 KiB) Downloaded 173 times

R8 determines the fastest possible realease time. With 47k fastest release is approximately 100ms. If faster release time is wanted change R8 to 22k it changes the fastest release to approximately 50ms.


Make sure BD139 is oriented correctly. Emitter goes to the square pad on BD139 footprint.

sidechainECB.jpg (254.54 KiB) Viewed 11129 times

Rotary

rotary1.jpg (2.23 MiB) Viewed 11129 times

rotary2.jpg (3.18 MiB) Viewed 11129 times

Schematic

sidechainrotary.pdf

(72.32 KiB) Downloaded 161 times

BOM

sidechainrotaryBOM.pdf

(21.5 KiB) Downloaded 169 times

sidechainrotaryBOM.ods

(11.85 KiB) Downloaded 171 times

[scott2000]

I noticed that when I have the threshold all the way at max, I still get led meter action when turning the input gain up. Is this normal? What are the leds indicating?
Thanks!!

[Heikki]

Even when threshold is at max, large enough input signal will start gain reduction.

[scott2000]

Even when threshold is at max, large enough input signal will start gain reduction.

...Thank you!