[bonninr]

The Mixer tab as a mixing desk: one channel strip per rank, division, perspective group and output pair, and the desk fader's look on every fader that changes the sound.

Channel strip

Part	What it does
Fader	Ribbed cap, 0 dB at three quarters of the travel, +24 dB at the top, −∞ at the bottom; double-click returns to 0 dB
Scale	Tick every 2 dB, numbers at 0, +24, +12, +6, −5, −10, −15, −20, −30, −∞
Value box	The exact level in dB; double-click to type one
Meter	26 lamps, 2 dB each, from −50 dB; peak held 1.5 s
Mute, solo	M and S under the fader; learnable from MIDI
Stripe	Grey rank, amber division, cyan group, red output pair
Narrow strips	50 px strips, ticks without numbers, for large organs

The fader's travel is a display taper only: saved levels and the MIDI law stay the same.

Meters

• 4 readings a second, a slice of the voices per window, each voice watched for at least 20 ms: every audio block costs the same.
• Rank, division and group meters show the balance after the faders, before the swell boxes and the room. Their top colour is amber.
• An output pair's meter reads the pair's own signal after its swell boxes and room, before the master volume. Red from −6 dBFS.
• Meters switched off: nothing measured, output bit-identical (tested).

Mute and solo

• Solo on a rank, division or group: only the ranks under a soloed strip sound. Solo on a pair: only the soloed pairs. Mute wins over solo. Noises keep sounding.
• MIDI: the strip's MIDI button learns a knob or pedal for the level and buttons for mute and solo; a press toggles the strip's current state. Map file words strip-mute, strip-solo.
• Control API: types mute (23) and solo (24), value 0/1, 2 toggles; ranks, then divisions, groups and pairs.

Styled faders

Master volume, graphic EQ bands and gain, attack and attack time, voicing level, tuning, brightness, bass, pan and width (rank and division), reverb wet, metronome level, keep-awake level, limiter ceiling and release, compressor, pitch, pipe detune and wind sway. Each has ticks at real values (EQ every quarter of its range, pan at ±50/±100, width at 50/100/150/200 %, pitch at the organ's own pitch and at 392, 415, 430, 440 and 466 Hz where in range) and a styled value box.

Screenshots

Lemmer near (lite), every stop drawn, a chord held on Pedal and Great.

Mixer: Subbas 16′ near −18 dB, Great division in the amber, near perspective near −10 dB.

Narrow strips with Great muted: the Great division and its ranks dark, the Pedal reading, Pair 1 in view.

Equalizer and Voicing tabs:

Top-bar volume:

Tests

• functional.levels.strips: meters read every 44 blocks at 256 frames and 48 kHz; the pair reads the output's signal; output within rounding while metered and bit-identical once off; mute and solo from MIDI buttons (press toggles, release does nothing, map file round trip).
• functional.levels.organ: mute and solo through the control API.
• mp_tests --no-perf on Windows: 521 run, 0 failed. JUCE-free loop: all green.
• Translations for cs, de, es, fr, it, nl, pl in *.mixer-strips.txt.