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Add SigmaStudio manual chapter and align EQ runtime with export map.

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Document the ADAU1701 schematic chain (sigma-chain.jpg), cross-link from
hardware/firmware chapters, skip safeload on fixed high-pass band 0, and
match EqProfile default peaking frequencies to SigmaStudio.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
michele
2026-07-06 16:55:23 +02:00
co-authored by Cursor
parent ab3651e678
commit 6c350f5c48
10 changed files with 279 additions and 11 deletions
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Software/docs/manual/ch-firmware.tex
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@@ -134,6 +134,9 @@ The board carries no self-boot EEPROM. Instead, the ESP32 writes the
SigmaStudio-exported program into the DSP's RAM at \emph{every} boot.
Runtime changes to equalisation and mixing use the ADAU1701 safeload
mechanism, so parameter updates are click-free while audio is playing.
Which blocks are runtime-controllable (source faders, EQ bands 2--6,
master volume) versus fixed at export (high-pass, limiters) is listed in
Chapter~\ref{ch:sigmastudio}, Section~\ref{sec:ss-runtime}.
\begin{drcaution}[Safeload]
Writing DSP parameter cells directly while audio is running produces