NDS-004 / SM-013: VARIABILE CONTINUA — Campo di Ritorno
Label: Nastro di Servizio
Catalog No.: NDS-004 / SM-013 (internal Studio Magnetica matrix)
Format: LP (12″, 33⅓ RPM, black vinyl, mono)
Recording Year: 1975
Release Year: 1975
Edition: Est. 300 copies (private circulation)
Location: Studio Magnetica, Milan
Total Runtime: 40:50
Genre Tags: Drone · Signal Feedback · Analog Loop Systems · Early Process Recording

SIGNAL PRESSURE REVIEW
Campo di Ritorno documents a working system rather than a composed record.

VARIABILE CONTINUA treat the studio as a routing environment. Outputs are fed back into inputs, gain is pushed past stability, and the chain is allowed to run with only minor intervention. What changes is not the material but the behavior of the system under load.

Side A maintains a stable loop. Small adjustments—fader shifts, attenuation, filtering—alter the signal path without breaking continuity. The structure holds because the routing holds.

Side B increases pressure. The same configuration is pushed until it drops out, overloads, and re-enters. Sections collapse and resume mid-cycle. Continuity is no longer preserved; it is tested.

Nothing is corrected. Distortion, imbalance, and routing noise remain. The record captures a system operating, failing, and re-stabilizing in real time.

TECHNICAL INFORMATION
• Closed-loop feedback routing via mixer returns and open-channel bleed
• Concord routing configuration with manual gain staging; no limiting or compression
• Reel-to-reel capture (single-pass); no overdubs or post-editing
• Monitoring through mismatched speaker pairs; balance reflects room conditions
• Tape stock variation across reels producing tonal inconsistency

TRACKLIST

Side A – Campo (21:00)
1․ Campo di Ritorno I — 11:42
2․ Campo di Ritorno II — 09:18

Side B – Rientro (19:50)
3․ Rientro Instabile — 07:56
4․ Linea di Feedback — 05:24
5․ Campo di Ritorno III — 06:30
Total Runtime: 40:50

ARTWORK & INSERTS
• Typewritten insert sheet listing tracks and durations (not included in all copies)
• Plain white sleeve with stamped catalog identifier (“SM-013”)

PHYSICAL DETAILS
• Black vinyl pressing; mono cut
• Unprinted white sleeve with industrial stamp marking
• No standardized numbering; some copies unmarked
• Distributed through Studio Magnetica private exchange network

SUBSEQUENT FORMATS
• Internal reel copies circulated for system comparison and calibration
• Unverified cassette dubs exist; no formal secondary issue

EPILOGUE
The record holds on a condition and leaves it there.

The loop is established and allowed to run. As levels drift and routing shifts, the system changes without reset. There is no separation between setup and result. The same actions that initiate the process continue to shape it.

What remains is continuity under strain: a signal sustained, interrupted, and returned to the same path.

FOR LISTENERS OF:

• Conrad Schnitzler — early feedback recordings
• AMM — The Crypt
• Éliane Radigue — early analog work
• Cluster — Cluster II
• Faust — early tape-based process recordings
credits
released January 1, 1975

• Giorgio Valera — signal routing, feedback control, mixer returns
• Enrico Maderna — amplification systems, gain staging, loop calibration
• Paolo Nerucci — tape handling, reel alignment, delay path configuration
• Lucia Ferri — tonal filtering, attenuation control, monitoring

Engineer: Franco Bellotti
Recorded at: Studio Magnetica, Milan

all rights reserved