m4

src/components/eq/format.ts

@@ -0,0 +1,31 @@
+// Shared EQ value formatting for the band strip + detail panel.
+
+import { colors } from '@/theme';
+import type { EQBandType } from '@/types/audio';
+
+export function formatFreq(hz: number): string {
+  if (hz >= 1000) {
+    const k = hz / 1000;
+    return `${Number.isInteger(k) ? k : k.toFixed(1)}k`;
+  }
+  return `${Math.round(hz)}`;
+}
+
+export function formatGain(db: number): string {
+  if (Math.abs(db) < 0.05) return '0';
+  return `${db > 0 ? '+' : ''}${db.toFixed(1)}`;
+}
+
+export function gainColor(db: number): string {
+  if (db > 0.05) return colors.accentText;
+  if (db < -0.05) return colors.warning;
+  return colors.textTertiary;
+}
+
+export const BAND_TYPE_LABEL: Record<EQBandType, string> = {
+  lowshelf: 'Low Shelf',
+  peaking: 'Peaking',
+  highshelf: 'High Shelf',
+  highpass: 'High Pass',
+  lowpass: 'Low Pass',
+};