Circuit Atlas · HUSH M4 · Rev 2027.4 draft
2 About this manual
How this manual uses the words design target, calculated and measured, and how the browser model relates to the analogue design.
IN DEVELOPMENT · REV 2027.4 (DRAFT) · DESIGN TARGETS, NOT MEASUREMENTS
HUSH M4 is in development. This draft is published on zakkhutoretsky.com; it has no price and no ordering. Figures marked design target are goals for the finished product. Figures marked calculated come from the published formulas. No value on these pages was measured on a built unit. Interviews are cited as the design brief, not as an endorsement.
See this control Play the browser model Technical documents
2 About this manual
HUSH M4 is a four-channel analogue club mixer in development. The design brief started from what DVS1 has said in published interviews about how he plays (two CDJs and two Technics decks, an EQ that can take a band out, filters, no effects, booth monitoring, long sets). Appendix C maps each tailored feature to a cited quotation and lists where the design departs from him or nothing is documented. The interviews are cited as the design brief; this manual does not claim an endorsement.
Three words are used strictly. Design target: a goal the finished unit would have to meet. Calculated: worked out here from the cited formula with nominal component values and ideal op-amps. Measured: taken from a real unit with a stated method — there are none in this document. When a unit exists, a measurement report will follow the method of IEC 60268-3R9.
The playable mixer on the web page is a software model built with the Web Audio APIR11. Its filters and effects are not the analogue circuits in this manual, and nothing it plays is a measurement. Where the browser supports it, the model runs in an AudioWorklet with 32-bit float processing at the device’s own sample rate, a four-band EQ and a split filter with exact bypass, optional texture, oversampled soft saturation that is transparent below 0 dBFS and a true-peak limiter on the output only, and it can play lossless tracks the user loads from their own device and record the master to a 32-bit float WAV file or a dithered 24-bit one. Appendix D lists what was measured on that code in a simulation. The hardware design has no limiter or compressor in the master or booth path.