OR-0016
Tekura
Oregon, USA · 1979 – c. 2001
Ser. Type 1050 · Ser. No. 02207-A
1986 · effect
Issued as VST3 · AU
Restored 2024 from 1986 hardware.
Tekura 1050 — Reconstruction Filter
Tekura Type 1050 · Reconstruction Filter · restored from Ser. No. 02207-A · Tekura, Oregon, USA, 1986
The restorer's note
The output stage of a converter, isolated — the whole difference between "cheap digital" and "good digital," made a knob. Zero-order hold for the buzzy, imaged top; band-limited for the clean. One of Tekura's earliest designs, and still exact.
Acquisition
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The plate
Listening
Listening
Demonstration recordings, prepared at the bench.
Twelve kilohertz, held
The mix runs dry for five seconds, then the converter model: Zero-Order Hold at a 12 kHz Rate. The images sit above the passband, unfiltered — here, the reconstruction is the instrument.
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Forty-eight down to eight
Rate falls from 48 kHz to 8 kHz in one continuous move, Zero-Order Hold throughout. At the top the model is nearly transparent; by the bottom the images have walked down into the music.
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Three reconstructions
The same figure at a 16 kHz Rate, three ways: Zero-Order Hold with its images, Band-limited clean, then Brickwall — Ringing raised to 100 % puts the pre-ring in front of every hit. Bandwidth closes to 8 kHz at the end.
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