Super-Freq

Deformis: Ugly Face with Mix mod

This is my take on Tim Escobedo’s Ugly Face. I replaced the LM386 with a dual op-amp and and added a mix control.

The LM386 is a great chip but its gain is limited to 200. A single op-amp can easily generate a gain of 200 and more! This way I can replace the 386 with another 8 pin DIP and use the extra op-amp to create a summing mixer.

Here is a schematic:

Parts List

C1220n
C21n
C310n
C4100n
C5100n
C6470n
C7100n
C8220p
C10100n
C11100µ
C1247µ
C13100µ
C142µ2
C1510µ
D1LED
D21n5817
ENVELOPEB1k
FREQC100k
THRESHB10k
VOLA100k
MIXB10k
IC1 TL072
VACT_1LED/LDR
IC27555
R11M
R2470
R3100K
R456K
R5 1K
R6 47k
R7 2k
R8 10K
R9 10K
R101M
R11 200K
R12 1K
R13 15K
R14 15K
R1515K
R16 15K
R1815k

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Comments

2 responses to “Deformis: Ugly Face with Mix mod”

  1. B Avatar
    B

    Yow. Got all my parts lined up! I know you’re familiar with the uglies, maybe you can help me out. Have you fiddled with the optocoupler much? I wonder if an nsl32 will suffice or if I should go for the real deal vactrol. Also, I know about the deadair face disaster, but I recently saw another variant somewhere that wasn’t as transparent about the Escobedo influence, but can’t remember what in the hell it was. Ring a bell, maybe? Thanks

    Reply
    1. admin Avatar
      admin

      Great! Let me know about the results when you’re done!

      You can use any LED/LDR combo. The pot allows for some adjustment to compensate. The biggest differences will be heard in decay time of the LDR. I like the sound of a fast decay.

      Thanks for pointing out the Dead Air PCB I had t seen that.

      Reply

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