Hello there,
My journeyman seems to function well but the overall volume is low. It’s a 1U MOTM build. Drive function works, HP/LP basically same volume. I’m thinking R29 is wrong, but it sure looks like 100k. I did go cheap and use tl072 at U2. Any thoughts?
Journeyman low volume
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Synthbuilder
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Re: Journeyman low volume
How low is low? Might be worth measuring the output signal.
If you have a scope, measure the signal level going in versus coming out with the resonance down and the cut-off frequency up. It's expecting to see signals around 10V peak to peak going in. The output level will depend on drive (and frequency and resonance settings) but there is a significant gain loss through the Journeyman to allow for the huge increase in gain when you turn the resonance up. With a 440Hz triangle wave 10V p-p input, and high frequency and low resonance settings, you should see 1.5V p-p at low drive to 4.5V p-p at high drive.
Tony
If you have a scope, measure the signal level going in versus coming out with the resonance down and the cut-off frequency up. It's expecting to see signals around 10V peak to peak going in. The output level will depend on drive (and frequency and resonance settings) but there is a significant gain loss through the Journeyman to allow for the huge increase in gain when you turn the resonance up. With a 440Hz triangle wave 10V p-p input, and high frequency and low resonance settings, you should see 1.5V p-p at low drive to 4.5V p-p at high drive.
Tony
Re: Journeyman low volume
Thanks Tony. Scoped input and output and all is correct, no issues then. 
