Why do you need a waveshaper? Because the classic waveshapes of analog VCOs even when combined with all sorts of VCFs only allow a fraction of possible sounds: I am not just talking about far-out use-once-and-never-again sounds either, I mean workhorse sounds that fit in with all sorts of music. Here is various material about …
Category Archives: Uncategorized
Clean: Panels
4HP Panel6HP Panel The controls are: Phrase AR: controls the initial swell time, and the time between notes where the swell level is maintained.Note AR: controls the Attack and Release time of notes with a phrase.Accent: controls how sensitive the Envelope Generator is to the velocity input: fully clockwise the accent is fixed, fully counter-clockwise …
Shell Waveshaper: Bill of Materials
Rev 2 and Rev 3 PCB Note that none of the capacitor values is exactly critical. Note that some capacitors should be non-poliarized (e.g. using bipolar electrolytics). Id Designator Package Quantity Designation Supplier and ref 1 P2 1 MOTMPower Not used 2 C5,C7,C9,C8 4 1uF Bipolar (NP), e.g. bipolar electrolytic 3 R3,R5 2 4.7k 4 …
Shell Release Notes: Rev 2 PCB
PLEASE READ THESE BEFORE STARTING TO POPULATE THE BOARD There are two issues with the Rev 2 PCB that require fixes: Diodes D4 and D6 are no longer used. They limited the saw wave at high levels, but I prefer it without.Resistor R35 should not be installed in the expected place on the board. This …
Clean Release Notes: Rev 2 PCB
The PCB has one major error to fix and several highly recommended improvements. The panel has no known errors. Mandatory Fix The collector pin of Q5 is not connected. It needs to be connected to +12V. Use the clipped leg of a resistor, solder in a connection between the collector pins (pin 1) of Q5 …
Blip! Release Notes: Rev 2 PCB
There are no known issues with the PCB. Capacitor choice: Please note that the 1uF DC blocking capacitors C11 and C12 on the two audio outputs should be bipolar (non-polarized) capacitors, such as bipolar (NP) electrolyic capacitors or ceramics. However, the bypass capacitors C2 and C3 should be normal polarized electrolytic capacitors: they can be …
Clean: Bill of Materials
Rev 2 PCB Note that the information in the “Package” column is not prescriptive: a wide variety of different packages will fit the same holes. The panel is quite tight, so a small knob is best: a good knob appears at the end. IdDesignatorPackageQuantityDesignationSupplier and ref1R35,R21R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal22.2M 2R34,R33,R30,R25R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal41M 3P1IDC-Header_2x08_P2.54mm_Vertical1EurorackPower16pin 4R31R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal1150k 5R32,R20,R24,R6,R9R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal5100k 6 7 8 9 10 …
Blip! Bill Of Materials
Rev 2 & Rev 3 PCB There is only minor difference between the Rev 2 (yellow non-ROHS) and 3 (blue ROHS) boards. See the Release Notes. Note that the information in the “Package” column is not prescriptive: a wide variety of different packages will fit the same holes. The panel is quite tight, so a …
General Building Guide
FAQ: Global Shortage of 100k 9mm Pots In 2021 there was a global shortage of 100k linear-taper 9mm vertical PCB-mount potentiometers: exactly what most fricko boards use. A synth DIY store even posted in public to ask board designers to use different parts or values. This shortage was still (4Q 2022), sporadically, affecting supply in …
Rasp Waveshaper: the Backstory
I was looking at some wavefolder circuits (like the Buchla timbre modulator, the Serge wavefolder and wave multipliers), and admiring the cascading design where increasing the input level progressively causes each section to kick in. Some commented that they worked best on sines/triangles (because folding a saw just ends up giving you a triangle) rather …
Freak Out! 