Overview | Bytes | Program identity | Preset inventory | Preset sheet | Byte map | Cross-series | System dumps
Generated 2026-07-22. Source folder: sysex/prog/parameters/lf rt crossover/.
- Offsets: 120-121
- Encoding:
nibble_hilo - Confidence: medium
- Range: Range 80 ... 4800 Hz (capture extremes)
- Layout: byte map overview · full map
Sets the crossover frequency used by LF RT Multiply.
Source: Bricasti M7 Owner's Manual — Reverb Parameters.
Witness sources: encoding sources (dump, provided, inferred, preset links).
nibble_hilo |
Offset 120 | Offset 121 | Label | Source |
|---|---|---|---|---|
| 0 | 00 |
00 |
80 Hz | dump, provided |
| 1 | 00 |
01 |
120 Hz | dump, provided, 1 |
| 2 | 00 |
02 |
160 Hz | dump, provided, 1 |
| 3 | 00 |
03 |
200 Hz | provided, 1 |
| 4 | 00 |
04 |
240 Hz | provided, 1, 2 |
| 5 | 00 |
05 |
280 Hz | provided, 1, 2 |
| 6 | 00 |
06 |
320 Hz | provided, 1, 2 |
| 7 | 00 |
07 |
360 Hz | provided, 1 |
| 8 | 00 |
08 |
400 Hz | dump, provided, 1, 2, 3 |
| 9 | 00 |
09 |
480 Hz | provided, 1, 2, 3, 4, 5 |
| 10 | 00 |
0A |
560 Hz | provided, 1, 2, 3, 4, 5, +3 more |
| 11 | 00 |
0B |
640 Hz | provided, 1, 2, 3, 4, 5, +2 more |
| 12 | 00 |
0C |
720 Hz | dump, provided, 1, 2, 3, 4, 5, +3 more |
| 13 | 00 |
0D |
800 Hz | provided, 1, 2, 3, 4, 5, +21 more |
| 14 | 00 |
0E |
1000 Hz | provided, 1, 2, 3, 4, 5, +12 more |
| 15 | 00 |
0F |
1200 Hz | provided, 1, 2, 3 |
| 16 | 01 |
00 |
1400 Hz | provided, 1, 2 |
| 17 | 01 |
01 |
1600 Hz | provided, 1, 2 |
| 18 | 01 |
02 |
1800 Hz | provided |
| 19 | 01 |
03 |
2000 Hz | provided, 1 |
| 20 | 01 |
04 |
2400 Hz | provided, 1 |
| 21 | 01 |
05 |
2800 Hz | provided |
| 22 | 01 |
06 |
3200 Hz | provided |
| 23 | 01 |
07 |
3600 Hz | provided |
| 24 | 01 |
08 |
4000 Hz | dump, provided, 1 |
| 25 | 01 |
09 |
4400 Hz | dump, provided |
| 26 | 01 |
0A |
4800 Hz | dump, provided |
Factory presets that witness encoded steps with more than 5 matches (collapsed in the table above):
- 10: Ambience: Large & Dark, Medium & Dark, Small & Dark; Chambers: Old Chamber; Halls: Concert Hall; Rooms: Heavy Room, Studio C, Studio E
- 11: Chambers: Kick Chamber; Halls: Amsterdam Hall; Rooms: Small Q Room; Spaces: Arena, Bath House, East Church, North Church
- 12: Chambers: Large Chamber, Small Chamber; Halls: Boston Hall B, Large & Deep, Large & Near, The ArchDuke, Vienna Hall; Spaces: Scoring Stage
- 13: Ambience: Deep Ambience, Large & Bright, Large Ambience, Long Ambience, Small & Bright; Chambers: A&M Chamber, CD Chamber, Large & Bright, Medium Chamber, Snare Chamber; Halls: Brass Hall, Chicago Hall, Large Hall, Medium & Deep, Medium & Near, Medium Hall, Small & Near, Small Hall; Plates: Dark Plate, Large Plate, London Plate, Snare Plate B; Rooms: Large Q Room, Large Room, Music Room; Spaces: West Church
- 14: Ambience: Bass XXL, Clear Ambience; Chambers: Amb Chamber A, Amb Chamber B, Deep Chamber; Halls: Sandors Hall; Plates: CD Plate A, Dense Plate, Echo Plate, Silver Plate, Snare Plate A; Rooms: Deep Stone, Drum & Chamber, Large Wooden, Small Room, Small Wooden; Spaces: Cinema Room
Sparse series used as anchors (plus secondary/checksum bytes that moved with this capture stream):
| Label | Offset 120 | Offset 121 | nibble_hilo |
Display lo 147 | Checksum 152-155 | Source |
|---|---|---|---|---|---|---|
| 80 Hz | 00 |
00 |
0 | 07 |
01 0B 0F 08 |
dump |
| 120 Hz | 00 |
01 |
1 | 07 |
0D 0B 06 09 |
dump |
| 160 Hz | 00 |
02 |
2 | 08 |
0D 0B 08 0D |
dump |
| 400 Hz | 00 |
08 |
8 | 09 |
01 0E 01 00 |
dump |
| 720 Hz | 00 |
0C |
12 | 0A |
0D 0C 01 05 |
dump |
| 4000 Hz | 01 |
08 |
24 | 0B |
07 02 06 08 |
dump |
| 4400 Hz | 01 |
09 |
25 | 0C |
07 02 04 0C |
dump |
| 4800 Hz | 01 |
0A |
26 | 0D |
0B 03 0C 01 |
dump |
- Primary field: offsets 120-121, encoding
nibble_hilo(table/index candidate (monotonic 100%)). - Confidence: medium (0/8 dumps matched, 100%).
- Catalog hint (Bricasti): LF RT Crossover - printed 80 ... 4800 hz [match] - hint only; dumps win.
- Catalog notes: Own Hz table @ 120-121 (not HF's).
- Range: Range 80 ... 4800 Hz (capture extremes).
- Sampling: extremes, adjacents, 4 sample mid(s) (not every step).
- Edge slopes: Low and high extreme->adjacent slopes disagree - prefer a table/index interpretation over a partial closed-form scale.
- How to set:
- Use the per-dump mapping table in encoding_hypotheses until a closed-form scale is confirmed
- recompute trailing checksum: CRC-16/ARC over bytes[8:152], pack as four high-nibble-first SysEx bytes at offsets 152-155
- Secondary offsets: 147 (display low nibble) (edit/UI state, not the parameter word).
- Checksum nibbles: 152-155 (CRC-16/ARC over offsets 8-151, packed high-nibble-first).
Documented in the spec (encoding map / manual) but not yet witnessed in a committed dump. "Possible" spans every encoded step in this field's range; missing steps are listed as ranges when there are many.
- Encoding range: encoded 0–26 (27 steps documented).
- Never captured on the wire (19): encoded 3–7, 9–11, 13–23 — see the encoding map above for each label.
- Documented gaps (no row at all): none between documented min/max.
- Wire nibbles never observed (
0–F): offset 120 (high):23456789ABCDEF; offset 121 (low): none