Cycfi Research
cycfi.com
Cycfi Research
@cycfi.com
This is Cycfi Research discussion group. Feel free to discuss just about anything related to acoustic, electric and electronic musical instruments, effects, DSP, synthesis, recording, etc.
What is it? The Tone Block is a compact, second-order resonant RLC filter with adjustable frequency and resonance, giving you the flexibility to shape the guitar pickup’s character on the fly.

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Cycfi Research
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March 6, 2025 at 1:59 AM
The Thor Mark III features a complete neck redesign with an asymmetric trapezoidal profile for superior ergonomics and playability. Inspired by Rick Toone and Ola Strandberg, this design enhances comfort while retaining the ultra-thin taper of the original Thor Mk II.
February 11, 2025 at 11:25 PM
... The second-order filter provides a 12dB/octave (40dB/decade) roll-off, which is exactly the response of a traditional high-impedance passive pickup that the Tone Block is meant to emulate.
January 30, 2025 at 11:18 PM
... giving you the freedom to change each pickup’s character on the fly, from dark gothic metal to sunny surf rock. The Tone Block allows you to dial in the characteristics of virtually any pickup.
January 30, 2025 at 11:18 PM
For those who tuned in late, the Tone Block is a compact (48 x 20 mm), second-order (two-pole) resonant RLC filter with variable frequency and Q (resonance). It is a general-purpose device that can be used with any pickup, both passive and active, including piezo...
January 30, 2025 at 11:17 PM
4. Infinity (Polyphonic Sustainer) Kit: Available after the Infinity Mark III upgrade is completed.
January 17, 2025 at 12:11 AM
3. Infinity Mark III System: Shared by both Thor Mark III and Valkyrie Mark II, including the new e-whammy and increased output drive with overdrive.
January 17, 2025 at 12:11 AM
2. Valkyrie Mark II: A turn-key solution for Infinity, crafted using standard guitar manufacturing techniques: An open invitation to gauge interest.
January 17, 2025 at 12:11 AM
1. Thor Mark III: Limited production run of 10 guitars, featuring significant improvements over Mark II.
January 17, 2025 at 12:10 AM
The Tone Block allows you to dial in the characteristics of virtually any pickup. The second-order filter provides a 12dB/octave (40dB/decade) roll-off, which is exactly the response of a traditional high-impedance passive pickup that the Tone Block is meant to emulate.
January 10, 2025 at 1:00 AM
It is a general-purpose device that can be used with any pickup, both passive and active, including piezo, giving you the freedom to change each pickup’s character on the fly, from dark gothic metal to sunny surf rock.
January 10, 2025 at 1:00 AM
To those who are not familiar with the Tone Block, the Tone Block is a compact (48 x 20 mm), second-order (two-pole) resonant RLC filter with variable frequency and Q (resonance).
January 10, 2025 at 12:59 AM
... However, this purpose is largely fulfilled by blogs. Perhaps I’m not yet fully accustomed to the concept of microblogging, which this site specifically caters to.
December 17, 2024 at 1:22 AM
On one hand, social media is a way to reach out to people, and that requires some critical mass to get some traction. Engagement, is a metric. On the other hand, this can simply be a way to document events that eventually becomes a historical record. In this case, engagement becomes secondary.
December 17, 2024 at 1:21 AM
What is your experience with Bluesky so far? Share your thoughts. To be honest, I am not sure if I want to keep it going.
December 16, 2024 at 10:32 PM