Edgelord
FX TYPE: Envelope Filter
Based on the Ibanez® SB-7™
Enclosure Size: 1590BB
“Softie” compatibility: none
©
2020
Overview
The
Edgelord
is a clone of the Ibanez SB-7 Bass Synthesizer. This circuit has largely been
overlooked by the DIY community and it’s a shame because it is very fun to play with on bass and
guitar. It’s not really a synthesizer, though. More accurate to call it an envelope filter with optional
distortion. But, certainly it’s different enough than other filter projects out there to command your
attention.
Changes from the stock circuit: true bypass instead of FET bypass, toggle and rotary switches in
place of slide switches, output gain trimmer, and optional LEDs that light up according to which
“synth” mode you are in.
Controls
• FREQ -
Sets the frequency sweep of the envelope.
• SENSE -
Adjusts the sensitivity of the envelope detector.
• REZ -
Adjusts the resonant peak of the envelope frequency.
• LEVEL -
Sets the output volume of the effect.
• DECAY -
This switch toggles between short and long envelope decay times.
• MODE -
This rotary selects three modes for the effect: Autowah, Synth1 and Synth2. Autowah
is clean envelope. Synth1 and Synth2 add different amounts of distortion to the envelope for a
pseudo synthesizer effect.
• T1 -
This trimmer sets the output voltage of the LM317TZ regulator. It should be adjusted for 7v
(see Notes).
• VOL -
This trimmer sets the output gain (see Notes).
Terms of Use:
You are free to use purchased
Edgelord
circuit boards for both DIY and small commercial operations. You may not
offer
Edgelord
PCBs for resale or as part of a “kit” in a commercial fashion. Peer to peer re-sale is fine, though.
Technical assistance
for your build(s) is available via the
. Please go there rather than emailing me for
assistance on builds. This is because (1) I’m not always available to respond via email in a timely and continuous manner, and (2)
posting technical problems and solutions in the forum creates a record from which other members may benefit.
