SSMU-081: REGISTRO GEMINATO — Studio Documentation Series
Label: Sabbia Sorda Mobile Unit (SSMU)
Catalog No.: SSMU-081
Format: Cassette (Type I ferric, mono; ¼″ RTR → cassette transfer)
Recording Year: 1980
Release Year: 1980
Edition: 80 copies (hand-numbered)
Location: Southern Italy · Iberian relay routes (SSMU mobile rig capture)
Total Runtime: 43:08
Genre Tags: Dual-Frequency Minimalism · Institutional Rhythm Study · Low-Register Counterpoint · Structural Studio Document

SIGNAL PRESSURE REVIEW
This is not a conventional group session. It documents a controlled setup.

Two bass instruments operate in separate registers and do not mirror each other. Mauro Valli holds the low band with long, even notes and minimal movement. Above that, Giacomo “Jackknife” Valli plays short, articulated phrases in the upper range. The relationship is defined by separation and controlled interruption.

The drum kit functions as a timing reference. Snare and kick mark position rather than drive momentum. There are no fills or dynamic shifts.

Synth is used sparingly. ARP tones appear as sustained intervals that track the distance between the two bass lines. They act as measurement rather than harmony.

Side A maintains strict separation between registers. Side B allows partial overlap. Phase interaction increases briefly, then returns to alignment. There is no escalation beyond that point.

The session holds a fixed condition from start to finish.

TECHNICAL INFORMATION
• Recording Medium: ½″ reel-to-reel (Studer A80), stereo master
• Studio: Studio Nord-Emilia, Bologna
• Engineer: Franco Bellotti

Instrumentation & Capture:
– Fender Jazz Bass (flatwound) — DI + mic’d cabinet
– Rickenbacker 4001 — upper-register articulation (pick attack)
– Hammond C3, Farfisa Compact — limited reinforcement
– ARP Odyssey — sustained interval tones
– Ludwig kit — tight snare, minimal resonance

Approach & Processing:
• Bass EQ adjusted to prevent frequency masking
• Stereo master tested in mono prior to duplication
• No compression added during cassette transfer
• Real-time duplication via SSMU deck chain

TRACKLIST
Side A (21:31)
1. Registro Geminato I

Side B (21:37)
2. Registro Geminato II
Total Runtime: 43:08

ARTWORK & INSERTS
• Black cassette shell with white stamped catalog imprint
• Matte J-card
• Front: dual parallel frequency bands (muted gray / desaturated red)
• Reverse: signal routing diagram and session data
• Hand-numbered (01/80 – 80/80)
• No additional insert

PHYSICAL DETAILS
• 80 copies duplicated in-house
• Real-time transfer from stereo master
• Distributed via SSMU correspondence network
• No retail distribution
• No vinyl pressing

ARCHIVAL STATUS
• Original stereo master believed extant
• No reissue
• No digital release
• Cassette remains sole authorized format

EPILOGUE
Two registers maintained.
Interference introduced and measured.
Alignment restored.

FOR LISTENERS OF:

• ACCIAIO RITUALE structural rhythm studies
• Late-1970s dual-bass session recordings
• Minimal studio counterpoint documents
• Cassette-only institutional releases
credits
released January 1, 1980

• Mauro Valli — Fender Jazz Bass (low-register foundation)
• Giacomo “Jackknife” Valli — Rickenbacker 4001 (upper-register articulation)
• Luca Ferretti — Hammond C3, Farfisa Compact, ARP 2600
• Giorgio Nardi — drum kit (structural timing)
• Enzo Calieri — ARP Odyssey (calibration tones)

Engineers: Franco Bellotti · Giacomo “Jackknife” Valli
Produced under SSMU supervision
license
all rights reserved