American spelling

cli/XAir.c

@@ -121,7 +121,7 @@ static void handle_fx_type(int slot) {
 }
 
 static void handle_fx_par(int slot) {
-    /* echo the set command back to caller (X32 behaviour) */
+    /* echo the set command back to caller (X32 behavior) */
     memcpy(s_buf, r_buf, r_len);
     s_len = r_len;
     xsend((struct sockaddr *)&client_ip, client_ip_len);

cli/ringout_logic.c

@@ -44,7 +44,7 @@ RingoutAction ringout_step(RingoutState *st, const float *bins, const float *bas
     }
 
     /* A notch placed last step takes priority: back the gain off and re-settle
-     * before analysing again, so the notch can take effect. */
+     * before analyzing again, so the notch can take effect. */
     if (st->pending_backoff) {
         st->pending_backoff = 0;
         st->cur_gain_db -= st->cfg.step_db;
@@ -57,7 +57,7 @@ RingoutAction ringout_step(RingoutState *st, const float *bins, const float *bas
         return a;
     }
 
-    /* Settle: ignore frame content until the system has stabilised. */
+    /* Settle: ignore frame content until the system has stabilized. */
     if (st->phase == RO_PHASE_SETTLE) {
         if (st->settle_count > 0) {
             st->settle_count--;
@@ -67,10 +67,10 @@ RingoutAction ringout_step(RingoutState *st, const float *bins, const float *bas
         st->confirm_count = 0;
         st->confirm_bin   = -1;
         st->stable_count  = 0;
-        /* fall through and analyse this frame */
+        /* fall through and analyze this frame */
     }
 
-    /* Analyse: is there a narrow ring? */
+    /* Analyze: is there a narrow ring? */
     int peak;
     int found  = detect_peak(bins, baseline, st->cfg.threshold_db, &peak);
     int narrow = found && is_narrow_peak(bins, RTA_BINS, peak,

cli/ringout_logic.h

@@ -52,7 +52,7 @@ typedef struct {
     int   stable_frames;     /* consecutive ring-free frames required before raising */
     int   narrow_skip;       /* is_narrow_peak: skip */
     int   narrow_span;       /* is_narrow_peak: span */
-    float narrow_min_db;     /* is_narrow_peak: min advantage over neighbours */
+    float narrow_min_db;     /* is_narrow_peak: min advantage over neighbors */
 } RingoutConfig;
 
 typedef struct {
@@ -73,7 +73,7 @@ typedef struct {
     float margin_db;         /* gain-before-feedback margin achieved (cur - start) */
 } RingoutState;
 
-/* Initialise state from config. cfg is copied; sane fields are required (e.g.
+/* Initialize state from config. cfg is copied; sane fields are required (e.g.
  * step_db > 0, ceiling_db >= start_gain_db). The bus is assumed to already be at
  * cfg.start_gain_db when the loop begins. */
 void ringout_init(RingoutState *st, const RingoutConfig *cfg);

cli/rta_bins.c

@@ -3,7 +3,7 @@
 
 /* Log-frequency interpolation of the 31 ISO 1/3-octave GEQ anchors
  * (TOAST_GEQ_BIN ↔ ISO centers), 1 kHz pinned to bin 56. Off-anchor bins are
- * modelled, not measured — verify with a console sweep via --rta-probe. */
+ * modeled, not measured — verify with a console sweep via --rta-probe. */
 const float RTA_BIN_FREQ[RTA_BIN_COUNT] = {
         20.0f,     21.5f,     23.2f,     25.0f,     26.5f,     28.1f,     29.7f,     31.5f,
         34.1f,     36.9f,     40.0f,     43.1f,     46.4f,     50.0f,     54.0f,     58.3f,

cli/rta_probe.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """Live /meters/4 RTA peak-bin probe for X32/XAir — field tool for T-027.
 
-Subscribe to the 100-bin RTA, print the peak bin (and its modelled frequency
+Subscribe to the 100-bin RTA, print the peak bin (and its modeled frequency
 from cli/rta_bins.c). Use with a known tone to verify the bin->Hz table:
 a 1 kHz pistonphone must light bin 56; a console sine sweep verifies the rest.
 
@@ -15,7 +15,7 @@
     sys.exit("usage: rta_probe.py <xr18_ip> [seconds]")
 PORT = 10024
 
-# modelled bin->Hz, parsed from the C table so the two never drift
+# modeled bin->Hz, parsed from the C table so the two never drift
 try:
     txt = pathlib.Path(__file__).with_name("rta_bins.c").read_text()
     BIN_FREQ = [float(x) for x in re.findall(r"([0-9]+\.[0-9]+)f", txt)[:100]]

cli/test_ringout_emu.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """T-025 / T-032 ring-out safety harness: a mock X32 that models the feedback
 loop and asserts the ring-out control loop's safety properties (ceiling, notch,
-restore, abort). No audio — feedback is modelled as a function of commanded
+restore, abort). No audio — feedback is modeled as a function of commanded
 bus gain via a pluggable RoomModel.
 
 Run:

docs/ringout-design.md

@@ -16,7 +16,7 @@ with a handoff:
   **static notch profile + the measured gain-before-feedback margin**.
 - **Reactive (protect)** — starts *from that profile* (static notches pre-placed)
   and dynamically defends the remaining margin during the show. This is the
-  existing ToastSaver behaviour, plus a new "load a profile at startup" step.
+  existing ToastSaver behavior, plus a new "load a profile at startup" step.
 
 > The proactive pass *produces* what the reactive pass *consumes*. "React as
 > planned" = the planned notches are already in when the show starts; live mode

docs/system-tune-design.md

@@ -55,7 +55,7 @@ generator and writes the GEQ.
 1. **Mains response EQ** — pink noise → measure at a mic → flatten LR GEQ to the
    target curve.
 2. **Per-monitor** — optionally pink-flatten each wedge, **then ring it out**
-   (the current work) to maximise gain-before-feedback.
+   (the current work) to maximize gain-before-feedback.
 3. **Report** — final EQ curves + per-monitor headroom margins (and reuse the
    ring-out profile format from `T-024`).
 

esp32/X32Link/beat_synth.h

@@ -16,14 +16,14 @@ typedef struct {
     uint32_t last_ms;   // wall-clock ms of the last emitted beat
 } BeatSynth;
 
-// Clear state (last_ms = 0). Behaviour then matches a fresh static counter:
+// Clear state (last_ms = 0). Behavior then matches a fresh static counter:
 // the first step() with now_ms past one interval fires immediately.
 void beat_synth_reset(BeatSynth* s);
 
 // Advance to now_ms and return true if a beat is due at `bpm`. Fires when
 // (now_ms - last_ms) has reached the 60000/bpm interval (unsigned/wrap-safe),
 // then latches last_ms = now_ms. bpm <= 0 always returns false and leaves state
-// untouched (so a resumed BPM fires promptly, matching the old inline behaviour).
+// untouched (so a resumed BPM fires promptly, matching the old inline behavior).
 bool beat_synth_step(BeatSynth* s, uint32_t now_ms, float bpm);
 
 #ifdef __cplusplus

esp32/X32Link/web_config.cpp

@@ -178,7 +178,7 @@ if(curSlot>maxSlot){curSlot=maxSlot;hSlot.value=maxSlot}renderSlots()});
 renderSlots();
 var bpmEl=document.getElementById('bpm'),beatEl=document.getElementById('beat');
 var seedBpm=parseFloat(bpmEl.textContent)||0,beatTimer=null,shownBpm=-1;
-// Free-running fallback blink (pre-LNK-022 behaviour) — used whenever the
+// Free-running fallback blink (pre-LNK-022 behavior) — used whenever the
 // server says phase isn't valid yet (sync gap / no source). Unchanged.
 function setBeat(bpm){if(beatTimer){clearInterval(beatTimer);beatTimer=null}
 if(bpm>0){beatTimer=setInterval(function(){beatEl.classList.add('on');setTimeout(function(){beatEl.classList.remove('on')},90)},60000/bpm)}}

esp32/X32MidiClock/X32MidiClock.ino

@@ -112,7 +112,7 @@ void setup() {
                    g_config.fx_slot, g_config.mixer_ip,
                    config_model_port(g_config.model));
 
-    // USB MIDI must be initialised before WiFi to ensure USB enumeration is fast
+    // USB MIDI must be initialized before WiFi to ensure USB enumeration is fast
     // Device name is set in midi_clock.cpp via USBMIDI constructor
     USB.manufacturerName("X32Link");
     midi_clock_init();  // calls MidiUSB.begin() + spawns poll task

esp32/X32MidiClock/midi_bpm.cpp

@@ -5,7 +5,7 @@
 #include <Arduino.h>
 
 void midi_bpm_init() {
-    // nothing to initialise — state lives in midi_clock module
+    // nothing to initialize — state lives in midi_clock module
 }
 
 float midi_bpm_update() {

esp32/tasks/FDR-002.md

@@ -16,7 +16,7 @@ updated_at: 2026-06-29
 
 ## Goal
 
-Implement the FaderDisp behaviour: when a channel fader moves, show its value in
+Implement the FaderDisp behavior: when a channel fader moves, show its value in
 **dB on that channel's scribble strip**, by writing `/ch/NN/config/name`. On a
 clean shutdown / disable, restore the original names.
 

esp32/tasks/ITT-002.md

@@ -45,5 +45,5 @@ send a MIDI message). This is the "If This Then That" core.
   and send as the raw OSC float (the mixer applies its own fader taper).
 - Keep the engine allocation-free at eval time; build the rule table once at
   load / on web save.
-- This generalises X32Midi2OSC (MIDI→OSC) and X32Commander (OSC→MIDI/OSC) from
+- This generalizes X32Midi2OSC (MIDI→OSC) and X32Commander (OSC→MIDI/OSC) from
   the upstream toolset into one bidirectional firmware.

esp32/tasks/LNK-001.md

@@ -13,7 +13,7 @@ updated_at: 2026-06-26
 ## Goal
 
 Create the `esp32/X32Link/` Arduino sketch directory with a minimal WiFi
-sketch and a `config.h` that centralises all runtime parameters. Verify the
+sketch and a `config.h` that centralizes all runtime parameters. Verify the
 bare sketch compiles and connects to WiFi before any Link or OSC code is added.
 
 This task targets any ESP32-S3 board (XIAO ESP32-S3, ESP32-S3 Super Mini, etc.).
@@ -71,7 +71,7 @@ arduino-cli upload \
 
 **Serial quirk**: On ESP32-S3 with USB CDC, open the serial port with
 DTR=True, RTS=False BEFORE pressing RST. Hardware reset required after upload
-(same behaviour as ESP-001 / XIAO ESP32-S3).
+(same behavior as ESP-001 / XIAO ESP32-S3).
 
 **config.h constants** — all values as `#define`:
 

esp32/tasks/LNK-003.md

@@ -1,6 +1,6 @@
 ---
 id: LNK-003
-title: WiFi connection and Link session initialisation
+title: WiFi connection and Link session initialization
 status: done
 assignee: null
 priority: high

esp32/tasks/LNK-005.md

@@ -12,7 +12,7 @@ updated_at: 2026-06-26
 
 ## Goal
 
-Open a UDP socket to the XR18 and write the current BPM as a normalised float
+Open a UDP socket to the XR18 and write the current BPM as a normalized float
 to `/fx/{slot}/par/02` whenever `g_bpm_changed` is set. This is the final
 output stage — Link tempo → XR18 delay time.
 
@@ -23,13 +23,13 @@ output stage — Link tempo → XR18 delay time.
 - [ ] `send_bpm_osc()` builds a valid OSC `/fx/{slot}/par/02 ,f {val}` packet
 - [ ] OSC packet byte layout verified against `src/X32lib/Xsprint.c` reference
 - [ ] XR18 FX slot delay time visibly changes in X-Air Edit when DAW BPM changes
-- [ ] BPM range tested: 60, 120, 180 BPM → correct normalised values (see Notes)
+- [ ] BPM range tested: 60, 120, 180 BPM → correct normalized values (see Notes)
 
 ## Notes
 
 **Firmware scope**: `esp32/X32Link/` only. Do NOT touch `esp32/X32_emulator/`.
 
-**BPM → normalised float** (inline — cannot share `src/x32tap_logic.c`):
+**BPM → normalized float** (inline — cannot share `src/x32tap_logic.c`):
 ```c
 // Mirrors src/x32tap_logic.c: ms_to_normalized(), TAP_MAX_MS = 3000
 static float bpm_to_normalized(float bpm) {
@@ -41,7 +41,7 @@ static float bpm_to_normalized(float bpm) {
 ```
 
 **Expected values**:
-| BPM  | delay_ms | normalised |
+| BPM  | delay_ms | normalized |
 |------|----------|------------|
 |  60  | 1000 ms  | 0.3333     |
 | 120  |  500 ms  | 0.1667     |

esp32/tasks/LNK-009.md

@@ -53,7 +53,7 @@ same knobs under different prefixes:
 
 ## Constraints
 
-- No behaviour change: same values reach the same call sites, just sourced
+- No behavior change: same values reach the same call sites, just sourced
   per-input instead of via a fixed macro.
 - `DEFAULT_WIFI_*` / `DEFAULT_MIXER_IP` / `DEFAULT_MODEL` / `DEFAULT_FX_SLOT`
   already share names — leave them.

esp32/tasks/LNK-011.md

@@ -60,7 +60,7 @@ PublishDecision bpm_publisher_step(float bpm, bool active, uint32_t now_ms);
 
 - Pure C, no Arduino deps — buildable and testable on host (follow the
   existing `test/test_link_protocol.c` + weak-`millis` pattern).
-- Preserve current behaviour exactly: bpm=0 ⇒ no send (mixer holds last value);
+- Preserve current behavior exactly: bpm=0 ⇒ no send (mixer holds last value);
   send only on change-past-threshold OR per-bar refresh; respect min interval.
 
 ## Acceptance Criteria

esp32/tasks/LNK-012.md

@@ -34,7 +34,7 @@ no input-source field yet.
    `TempoSourceKind` enum from LNK-008. Default = Link.
 2. **NVS** (`app_config_nvs.cpp`): load/save the new key `input_src`; default to
    Link when absent (first boot / post factory-reset).
-3. **Web form** (`web_config.cpp`): add a labelled dropdown
+3. **Web form** (`web_config.cpp`): add a labeled dropdown
    "Tempo source: Ableton Link / USB MIDI clock"; submit persists it like the
    other fields, then reboots (existing save→restart flow).
 4. **Boot** (LNK-010 `setup`): `tempo_source_select(cfg.input_source)` before

esp32/tasks/LNK-031.md

@@ -61,7 +61,7 @@ in `link_measurement.c` stay as-is and are called by the session or the glue.
       timeouts emit END_FAIL; different-peer and due-timer both retrigger; trigger
       gated by `active`; pong carries prev-ghost / commits at READY.
 - [x] `link_measurement_io.cpp` reduced to sockets + timing that translate the
-      session's actions (`run_action`); behaviour faithfully ported (LNK-026
+      session's actions (`run_action`); behavior faithfully ported (LNK-026
       fixes preserved as session actions).
 - [x] Full host suite green (20 suites); firmware compiles 86%; `AGENTS.md` updated.
 - [x] **Re-verified on hardware** (flashed; Link peer @ 127 BPM). Steady play:

esp32/tasks/MCK-005.md

@@ -56,7 +56,7 @@ buffer just stays empty when disconnected; `midi_bpm_update()` returns 0.0 after
 the timeout, and OSC stops. On reconnect, Ableton re-sends clock and the
 firmware picks it back up within one beat.
 
-**Clock-stop behaviour (design decision)**: When the musician stops the DAW,
+**Clock-stop behavior (design decision)**: When the musician stops the DAW,
 we intentionally do NOT reset the X32 tempo to zero or a default. The desk
 keeps the last known tempo — the band can keep playing in time if the DAW
 stops unexpectedly. Tempo only changes when a new valid BPM arrives.

esp32/tasks/MCK-006.md

@@ -24,7 +24,7 @@ DAW start/stop.
 - [ ] Enabling "Clock" output in Ableton and pressing Play causes FX delay time
       on XR18 to update within 1–2 beats
 - [ ] BPM accuracy: set Ableton to 80, 120, 140, 180 BPM → X-Air Edit delay time
-      matches expected normalised values (see LNK-005 reference table)
+      matches expected normalized values (see LNK-005 reference table)
 - [ ] Tempo change: drag Ableton BPM from 120 → 140 → X32 follows within 1 beat
 - [ ] DAW stop: FX delay time stays at last known value (does not reset)
 - [ ] DAW start after stop: tempo resumes correctly within 1 beat

esp32/test/test_beat_synth.c

@@ -7,7 +7,7 @@ void setUp(void)    { beat_synth_reset(&s); }
 void tearDown(void) {}
 
 void test_fresh_state_fires_on_first_step_past_interval(void) {
-    // Matches the old inline behaviour: static last=0, a large millis() reading
+    // Matches the old inline behavior: static last=0, a large millis() reading
     // is >= one interval so the first observed beat fires.
     TEST_ASSERT_TRUE(beat_synth_step(&s, 1000, 120.0f));  // interval 500, 1000-0 >= 500
 }

ios/ToastSaverCore/Sources/ToastSaverCore/NarrownessFilter.swift

@@ -1,11 +1,11 @@
 // Distinguishes a narrow feedback ring from broadband content (e.g. a vocal
-// formant): a real ring towers over its neighbours a few bins out. Ported from
+// formant): a real ring towers over its neighbors a few bins out. Ported from
 // cli/toast_logic.c (is_narrow_peak).
 
 public enum NarrownessFilter {
     /// True if `bins[peakBin]` is at least `minDB` above the average of the
-    /// neighbour bins sampled `skip+1 … skip+span` positions away on each side
-    /// (clamped to the array). Needs ≥1 neighbour on each side, else false.
+    /// neighbor bins sampled `skip+1 … skip+span` positions away on each side
+    /// (clamped to the array). Needs ≥1 neighbor on each side, else false.
     public static func isNarrowPeak(bins: [Float], peakBin: Int,
                                     skip: Int = 2, span: Int = 3, minDB: Float = 10.0) -> Bool {
         let n = bins.count

ios/ToastSaverCore/Sources/ToastSaverCore/RingoutController.swift

@@ -21,15 +21,15 @@ public struct RingoutConfig {
     public var cutDB: Float
     /// Consecutive frames a ring must persist before a notch fires.
     public var confirmFrames: Int
-    /// Frames to wait at current gain after any raise or notch before analysing.
+    /// Frames to wait at current gain after any raise or notch before analyzing.
     public var settleFrames: Int
     /// Consecutive ring-free frames required before raising gain.
     public var stableFrames: Int
     /// Narrowness gate: bins to skip immediately adjacent to the peak.
     public var narrowSkip: Int
     /// Narrowness gate: bins to sample beyond the skip zone on each side.
     public var narrowSpan: Int
-    /// Narrowness gate: peak must exceed neighbour average by at least this many dB.
+    /// Narrowness gate: peak must exceed neighbor average by at least this many dB.
     public var narrowMinDB: Float
 
     public init(
@@ -147,17 +147,17 @@ public final class RingoutController {
             return .backOff(to: currentGainDB)
         }
 
-        // Settling: hold until the system stabilises after a raise or notch.
+        // Settling: hold until the system stabilizes after a raise or notch.
         if phase == .settle {
             if settleCount > 0 { settleCount -= 1; return .hold }
-            // Settle complete — fall through and analyse this frame.
+            // Settle complete — fall through and analyze this frame.
             phase        = .analyze
             confirmCount = 0
             confirmBin   = -1
             stableCount  = 0
         }
 
-        // Analyse: look for a narrow ring.
+        // Analyze: look for a narrow ring.
         guard let peakIndex = PeakDetector.detectPeak(
             bins: geqLevels, baseline: baseline, threshold: config.thresholdDB)
         else {

ios/ToastSaverCore/Tests/ToastSaverCoreTests/FeedbackDetectorTests.swift

@@ -38,7 +38,7 @@ final class FeedbackDetectorTests: XCTestCase {
         var b = flat(); b[idx] = spike; return b
     }
 
-    // narrowSkip=1, narrowSpan=1: a spike with at least 1 clear neighbour each side qualifies.
+    // narrowSkip=1, narrowSpan=1: a spike with at least 1 clear neighbor each side qualifies.
     private func makeDetector(confirm: Int = 3) -> FeedbackDetector {
         FeedbackDetector(threshold: 20.0, confirmFrames: confirm,
                          narrowSkip: 1, narrowSpan: 1, narrowMinDB: 5.0)

ios/ToastSaverCore/Tests/ToastSaverCoreTests/RingoutControllerTests.swift

@@ -99,7 +99,7 @@ final class RingoutControllerTests: XCTestCase {
         _ = ctrl.step(geqLevels: quiet, baseline: baseline)  // raise
 
         // Inject a narrow spike on par 10 (index 9).
-        // With narrowSkip=1, narrowSpan=1: neighbours are at ±2, which exist.
+        // With narrowSkip=1, narrowSpan=1: neighbors are at ±2, which exist.
         let spike = spikedLevels(at: 9, spike: -10.0, floor: -80.0)
 
         var action: RingoutAction = .hold

ios/tasks/IOS-003.md

@@ -35,12 +35,12 @@ final class FFTEngine {
     func process(_ samples: [Float]) -> [Float]
 
     /// Map an FFT bin index (0 ..< fftSize/2) to the nearest GEQ par (1–31).
-    /// Uses the same 1/3-octave centre frequencies as GEQMap.bins,
+    /// Uses the same 1/3-octave center frequencies as GEQMap.bins,
     /// recalculated for this engine's fftSize and sampleRate.
     func geqPar(forBin bin: Int) -> Int
 
     /// Precomputed GEQ bin indices for fftSize and sampleRate.
-    /// geqBins[i] is the FFT bin index closest to GEQ par i+1's centre frequency.
+    /// geqBins[i] is the FFT bin index closest to GEQ par i+1's center frequency.
     private(set) var geqBins: [Int]  // length 31
 }
 ```
@@ -87,7 +87,7 @@ Create `fftSetup` with `vDSP_create_fftsetup(log2n, FFTRadix(kFFTRadix2))` in `i
 
 ## geqBins calculation
 
-GEQ centre frequencies in Hz (31 bands, 1/3-octave, ISO):
+GEQ center frequencies in Hz (31 bands, 1/3-octave, ISO):
 ```
 [20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500,
  630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000,
@@ -115,7 +115,7 @@ private func computeGeqBins() -> [Int] {
 
 ## Acceptance Criteria
 
-- [ ] `FFTEngine(fftSize: 2048, sampleRate: 48000)` initialises without crashing.
+- [ ] `FFTEngine(fftSize: 2048, sampleRate: 48000)` initializes without crashing.
 - [ ] `process(_:)` with a 1 kHz sine wave at 48 kHz, 2048 samples: peak bin is within ±2 bins of `Int(round(1000 * 2048 / 48000))` = bin 43.
 - [ ] `geqBins[17]` (1 kHz, 0-based index) ≈ 43 for 2048/48000.
 - [ ] `process(_:)` with all-zero input returns all values ≤ -80 dBFS.