IdDesignatorPackageQuantityDesignation1R27,R26,R8,R6,R7,R13,R11R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal7100k2U3DIP-8_W7.62mm_Socket1NE55343C8,C11C_Disc_D5.0mm_W2.5mm_P2.50mm210n4C4,C6,C14,C16,C1,C15,C5,C19,C2,C7C_Disc_D6.0mm_W4.4mm_P5.00mm10.01uF5C13,C3C_Disc_D5.0mm_W2.5mm_P2.50mm2330pF6C18,C17C_Disc_D6.0mm_W4.4mm_P5.00mm2.0022uF7U2,U1DIP-14_W7.62mm_LongPads2TL0748R20,R21Potentiometer_Alps_RK09Y11_Single_Horizontal2100k9R1,R2R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal29.1k10J5,J3,J4,J1,J2PJ302M5PJ302M_NoSwitch11R10,R9,R15R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal310k12C12C_Disc_D5.0mm_W2.5mm_P2.50mm1.1n13R18,R23R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal227k14R19,R24,R25,R5R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal418k15R22,R17R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal256k16R16,R14,R12R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal31k17C9,C10CP_Radial_D5.0mm_P2.50mm21uF18P2IDC-Header_2x08_P2.54mm_Vertical1EurorackPower16pin19P1Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical1MOTMPower20R4,R3R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal236k The parameters above give a crossover of about 900Hz. To build a bass/baritone version with a lower crossover (2/3) of about 600Hz, make the following resistor substitutions: R19,R24,R25,R5 - 27kR22, R17 - 82kR23, R18 - 39k
ProPulse: Rev 1 Bill of Materials
IdDesignatorPackageQuantityDesignationSupplier and ref1TP2,TP1TestPoint_THTPad_D3.0mm_Drill1.5mm2TestPoint 2D4,D5,D3D_DO-41_SOD81_P10.16mm_Horizontal31N4001 3Q2,Q1TO-92_Inline_Wide2BC547 4C8,C15,C12CP_Radial_D5.0mm_P2.50mm31uF 5U8TO-220-3_Vertical1LM7805_TO220 6U7TO-92_Inline_Wide1L7805 7C9C_Rect_L4.6mm_W3.0mm_P2.50mm_MKS02_FKP0211n 8C11,C13C_Rect_L4.6mm_W3.0mm_P2.50mm_MKS02_FKP022.1uF 9C4,C2,C6C_Rect_L4.6mm_W3.0mm_P2.50mm_MKS02_FKP023100pF 10C10,C14C_Rect_L4.6mm_W3.0mm_P2.50mm_MKS02_FKP02210pF 11C5C_Rect_L7.0mm_W3.5mm_P5.00mm115n 12C7,C1,C3C_Radial_D5.0mm_H5.0mm_P2.00mm31u 13P1IDC-Header_2x08_P2.54mm_Vertical1EurorackPower16pin 14P2Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical1MOTMPower 15D1LED_D4.0mm1LED 16D2D_DO-35_SOD27_P7.62mm_Horizontal1BAT43 17U5,U2DIP-8_W7.62mm_LongPads2LM311 18RV2Potentiometer_Alps_RK09Y11_Single_Horizontal1100k 19R18,R16,R7,R6,R38,R40,R41,R42,R37,R31,R11,R12,R17,R2,R4,R1R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal1610k 20R19,R35,R28,R8R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal44.7k 21R20R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal1220k 22R21,R14,R33,R29,R27,R26,R24,R15R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal8100k 23R22,R36,R9R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal3470 24R23R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal110M 25R10R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal12.2k 26R5,R3R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal215k 27R34,R39R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal21M 28R43,R44R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal21Ferrite bead or resistor or link29J4,J1,J3,J2PJ302M4PJ302M_NoSwitch 30RV1Potentiometer_Alps_RK09Y11_Single_Horizontal150k 31U6,U3,U4,U1DIP-8_W7.62mm_LongPads4GENDUALOPAMP 32R30R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal120k 33R32,R13R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal21k 34R25R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal1470k
Splice: Deeper In Woodwind
The Splice Combiner came about in a very direct way: I had a problem, I did some research, I wondered how to do something like what they described in analog modues, I designed a circuit and had the PCB made and built. All in a week. In the case of Splice I was trying to …
Coronavirus Status
Business as usual: Open for business! Operating from home in Sydney Australia. Delays: We use tracked parcel post. The current Post Office advice is that packages sent may take double the usual time. But in 2020/2021 Australia Post, our national carrier, has had to suspend acceptance of packages to many countries where mail from Australia …
Why Look Backwards?
A message from our designer: Why do analogue synthesizer vendors keep looking backwards when the present has given us so many new opportunities?I have been playing synths for 45 years, and most of the analogue modules I see today (the endless ADSRS, VCOs with three waveshapes, practically indistinguishable ladder filters) were old hat even then. …
Vox H: Theory of Operation
Vox H. is three 12 db/octave Sallen-Key low-pass filters arranged in parallel. The original signal can be mixed to the output as well. F1 varies from 400 Hz (Q=20) to 322 (Q=2) F2 varies from 1.2 kHz (Q= 1.2) to 1.750 kHz (Q=11)F3 is set to 1k6 (Q=1) The original Polymoog board, the values are …
Splice: Theory of Operation
Splice provides a 36 db/octave low-pass filter on the Low input and a 36 db/octave high-pass filter on the High input, both at the same fixed frequency, just under 1 kHz. It provides individual and summed input ("Mix Out"). The module can be thought of a reverse crossover. (Until I find a better name, I …
Splice: The Back Story
I often read academic papers online about instrument accoustics. When I find something described, I ask myself "How would I do this kind of thing with analog modules?" Sometimes, if there are no modules that do it, I design something to try out. And many of these then find their way to you as fricko …
Patch Idea of the Month
Nov. 2019 - Brassification One of the recent discoveries of accoustic scientists was the realization that "brassiness" in part comes from the viscosity of air: a really loud sound wave (for example, as found inside a trombone being played loud) actually travels faster than a soft one. For brass, the effect is that the waveshape …
Sharpen Release Notes
This is preparatory material for a future product.
Freak Out! 