Sound Master demonstrated the Stix Programma ST-305 at the Birmingham British Music Fair in May 1982 and advertised it in Britain through 1983.
The machine in the record

Rayspark Industries / Pure Mind Technology.
Paul Darlington lists the ST-305 among the equipment behind the Pure Mind Technology compilation, principally associated with 1998–99 work. It is compilation-level evidence, not a track-by-track claim, and it preserves a small Soundmaster inside a personal electronic history.
Read Pure Mind Technology — artist album notes ↗More records in the archive
The machine keeps turning up.
Larry Smith / Androids in the Mist / early synth-rock recording practice
Larry Smith’s early recording rig paired a Soundmaster Stix ST-305 with a Fostex X15 four-track.
Read Larry Smith and the Soundmaster Stix ST-305 ↗A programmable step forward
Shown at the 1982 British Music Fair at £124.95, Sound Master’s Stix Programma ST-305 offered more voices, individual levels and separate outputs than the earlier SR88. It belongs to the moment when a British musician could expect a rhythm box to remember an arrangement, while still learning its particular panel logic.
Writing a beat into the box
The manual sets out a tactile system of paired 16-step patterns, two 12-step pairs, A/B variations and fills at selected bar intervals. Write mode records notes and rests, while seven percussion voices and accent hold their own places on the panel. The ST-305 lets a musician build a pattern and then give it a route through a song.Source (1)
Made for the mixer
Individual outputs and external clock made the Stix more than a domestic accompaniment box. A 1984 comparison valued the chance to correct its sounds with EQ and effects, while warning that an accidental Clear could undo a carefully made program—a vivid portrait of an affordable machine that still asked its owner to protect the work.
Seven faders, one proposition
The operating-manual cover shows the ST-305 panel, its seven voice faders and the controls used to enter, vary and interrupt rhythms. Alongside the show report, it makes the design proposition clear: a modest drum machine that expects a player to balance a kit rather than accept a finished accompaniment.
A machine with a later life
JSG Music offered the ST-305 for £99 including VAT in 1983. Much later, Rayspark Industries named one in the equipment used for Pure Mind Technology. Together the records follow a budget-shop rhythm box into a later musician’s working collection.
In the market
- 1982-08: GBP 124.95 — UK trade-show report quotation. ST305; accessories not specified. Report concerns May 14–18, 1982 show. Source ↗
- 1983-11-05: GBP 99 — UK retailer advertised offer, JSG Music. ST 305; free Securicor delivery stated Source ↗
- 1982-07: GBP 124.95 — UK contemporary buyers-guide quotation. Instrument; options not specified Source ↗
On record
- Rayspark Industries (Paul Darlington) — Pure Mind Technology (compilation; track allocation unspecified). Artist lists ST-305 among equipment used for the compilation, principally associated with 1998–99 compositions plus older material. Source ↗
- Larry Smith / Androids in the Mist — early synth-rock recording practice. Larry Smith’s early recording rig paired a Soundmaster Stix ST-305 with a Fostex X15 four-track. Source ↗
Sources
The visual archive
Further visual evidence.
Sources for images shown earlier (2)
- Stix Programma ST-305 Operating Manual ↗
- Rayspark Industries — Pure Mind Technology ↗
2018-08-10 · Rayspark Industries / release artwork via Bandcamp · Official artist Bandcamp release-page artwork and credits
Additional visual sources (1)
Original publications and related image sources.
- JSG Music price-list advertisement ↗
1983-11-05 · JSG Music · Printed p.53, PDF page 53, lower left
