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settings: make the preamp easier to set exactly

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The slider alone is awkward for the two things people actually do with a
preamp: zero it, and nudge it by a known amount.

- Minus and plus buttons flank the slider, stepping one grid notch (0.5
  dB) and disabling at the ends.
- A Reset button sits under it, beside the current value, disabled when
  the value is already zero.
- Both go through the same snapping the slider does, so a button cannot
  land off the grid.
This commit is contained in:
austinried
2026-10-16 13:07:11 +00:00
parent 0b4e1d18bc
commit 31859b66b6
4 changed files with 57 additions and 7 deletions
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app/src/test/kotlin/com/subtracks/ui/settings/ReplayGainControlsTest.kt
+8
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@@ -34,6 +34,14 @@ class ReplayGainControlsTest {
assertEquals(59, REPLAY_GAIN_PREAMP_STEPS)
}
@Test
fun thePreampStepsAlongTheGridAndStopsAtTheEnds() {
assertEquals(-1.5f, stepReplayGainPreampDb(-1f, -1), 0f)
assertEquals(-0.5f, stepReplayGainPreampDb(-1f, 1), 0f)
assertEquals(MIN_REPLAY_GAIN_PREAMP_DB, stepReplayGainPreampDb(MIN_REPLAY_GAIN_PREAMP_DB, -1), 0f)
assertEquals(MAX_REPLAY_GAIN_PREAMP_DB, stepReplayGainPreampDb(MAX_REPLAY_GAIN_PREAMP_DB, 1), 0f)
}
@Test
fun thePreampSnapsBackOntoTheHalfDecibelGrid() {
assertEquals(0f, snapReplayGainPreampDb(-0f), 0f)