OR-0044
Yumeo
Japan · 1985 – c. 2005
Ser. H-0455192
1990 · effect
Issued as VST3 · AU
Restored 2026 from 1990 hardware.
Yumeo PT-1 — Home Computer (Tracker)
Yumeo PT-1 · home computer audio · restored from unit no. H-0455192 · Yumeo, Japan, 1990
The restorer's note
The demoscene machine — four voices of 8-bit samples resampled hard off their root, buzzing at every mismatched loop point. The aliasing is not a shortcoming; on this hardware it was the sound, and we have kept it whole.
Acquisition
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The plate
The controls
The controls.
- Pitch -24–24 st · 0 st as issued
- Resamples the signal this many semitones from its root; away from zero, the resample grid no longer lines up and aliases hard.
- Bits 8-bit as issued
- Sets the sample path's word length: 8-bit, Paula's native depth, or 16-bit, a cleaner alternative.
- Ceiling 8.0–28.0 kHz · 28.0 kHz as issued
- Sets Paula's playback-rate ceiling — the resample grid's top rate; at its own top, 28 kHz, the control has no effect.
- Interpolation None as issued
- Chooses how resampled steps are smoothed: None, which keeps the hard aliasing authentic, or Linear.
- Channels Paula 4-ch as issued
- Chooses the panning character: Paula 4-ch, which runs the sides a half-step apart on the resample grid so their aliasing decorrelates, or Stereo hard-pan, which shares one grid for a narrower, more coherent sound.
- Loop Buzz 0–100 % · 20 % as issued
- Sets the click and buzz of a mismatched loop point.
- Input -24.00–24.00 dB · 0.00 dB as issued
- Sets the level going in, in decibels, before the signal reaches the restored circuit.
- Output -24.00–24.00 dB · 0.00 dB as issued
- Sets the level coming out, in decibels, after the restored circuit and the Mix blend.
- Mix 0–100 % · 100 % as issued
- Blends the restored circuit against the untouched signal at equal power, from the untouched signal alone at 0 % to the circuit alone at 100 %.
- Bypass Off as issued
- Takes the restored circuit out of the path and passes the untouched signal, delayed to match the circuit so nothing shifts in time.
A stored setup is a memory, shown where a track title would sit; the tray reads 03/12 ARCHIVE. The skip keys ◂◂ ▸▸ step through the memories without changing the sound, and PLAY loads the one shown. REC, then PLAY, opens a new memory's name, which starts as USER NN; TITLE EDIT renames a user memory. The skip keys change the letter, TITLE EDIT moves on, and PLAY stores it; the computer keyboard may type the name instead, Return storing and Escape cancelling as STOP does. ERASE clears a user memory on a second press.
Listening
Listening
Demonstration recordings, prepared at the bench.
Eight bits, plainly
The break runs dry, then through the machine at 16-bit, then — at fifteen seconds — the true 8-bit depth. Quiet tails fall below the eighth bit and simply stop.
0:00 / 0:30
Off the root
Pitch moves the resample grid off the root — down twelve, up twelve, home again — while the Ceiling falls from 28 to 9 kHz. The aliasing hardens and eases; the notes never move.
0:00 / 0:30
The tracker, working
The full mix on the tracker's terms: Linear interpolation gives way to None at ten seconds, the Channels go to hard pans, and Loop Buzz rises to 80 %.
0:00 / 0:30