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The Korg Trinity is a synthesizer and music workstation released by Korg in 1995. It was Korg's first modern workstation and marked a significant evolution from its predecessors by offering features such as built-in digital audio recording, 32-note polyphony, an extensive internal sound library, assignable effects, and a large touchscreen for advanced control and editing functions, a feature not previously seen on any musical instrument. It also offered modular expansion for not only sounds, but also studio-grade features such as ADAT, various sound engine processors, audio recording capability, and more.
The Trinity was considered one of the most comprehensive music workstations, in terms of features, at the time. After the discontinuation of the M1, the Trinity became the next Korg flagship synthesizer. In 1998, Trinity V3 models were introduced, incorporating sound engines from the Korg Z1.
The Trinity's design, from its aesthetic to its operational framework, draws heavily from the Korg 'T' and '01' series, incorporating elements such as Programs, Combis, and sequencing capabilities, as well as familiar global configurations and disk operations.
It utilizes 16-bit, 48kHz PCM samples stored in 24Mb of ROM, effectively doubled to 48Mb through 2:1 data compression. The sound library comprises over 1,000 individual samples, including 374 multisamples and an extensive drum library of 258 PCM sounds. Users can create up to 12 customizable drum kits, with the ability to apply up to four effects per kit. Additionally, each drum sound can be independently panned and sent to the filter.
Trinity's effects system was revolutionary at the time for the number of simultaneous effects (potentially truly multitimbral, plus overall effects), the ability of the user to assign those simultaneous effects with a great degree of freedom, the large number, variety, programmability of effects algorithms, and realtime effects control.
The effects system included eight-total user-assigned "Insert Effect" "Size" processing blocks, plus two distinct "Master Effect" send/return scheme processors. The Insert effect blocks are assigned by the user in series-chains of "Size 1" (single-block, mono-in/mono-out, 29 algorithms), and/or "Size 2" (double-block, usually stereo-in/stereo-out, 52 algorithms, including reverbs), and/or "Size 4" (quadruple-block, complex, 19 algorithms) effects, with a Program limit of total Size four or fewer blocks and three or fewer algorithms in series, or a Drum Kit limit of total Size four or fewer blocks and four or fewer algorithms in series or parallel, or multitimbral Combination or Sequencer Modes in Timbre Groups each utilizing all eight or fewer Size blocks divided into one or more series-chains with three or fewer algorithms per series for Programs and/or series-chains or parallel with four or fewer algorithms for Drum Kits (some further Size 4 algorithm placement restrictions apply).
The "Master-Modulation" (six algorithms) and "Master-Reverb/Delay" (eight algorithms) mono-in/stereo-out processors (chainable in series) were routed as send/return, so in multitimbral Combination and Sequencer Modes, each Timbre or Timbre Group has independent Master send levels. Finally there is a basic low/high shelving EQ before the Trinity main outputs.
All Trinity models were capable of being enhanced with the same multiple expansion options.
The PBS-TRI expansion board ($949/£625 MSRP) featured 8MB of PCM flash-ROM for loading Akai, Korg, and AIFF format samples and also included two separate S-RAM chips to be installed in sockets on the Trinity main PCB that were activated when the PBS-TRI board was installed, resulting in doubled sound-patch memory locations for Programs (increased to 512 by adding Banks "C" & "D"), Combinations (increased to 512 by adding Banks "C" & "D"), Drum Kits (increased to 24), and any installed Solo/MOSS DSP synthesizer (increased to 128) .
The HDR-TRI upgrade ($899/£599 MSRP) transformed the Trinity into a four-track hard disk recording and editing platform, adding SCSI, S/PDIF and analog audio inputs, and also enabling external audio procerssing through Trinity's Master Effects processors (only).
An SCSI-TRI option (redundant if HDR-TRI installed) ($599/£399 MSRP) added SCSI interfacing to external high-speed mass-storage like hard and/or optical drives.
The DI-TRI 4-channel ADAT-compatible digital audio interface with word clock syncronization ($349/£225 MSRP).
The SOLO-TRI "Solo DSP Synthesizer" option ($599/£475 MSRP, already included as standard in Trinity "Plus"/"Pro"/"ProX" models), compatible with Korg Prophecy soundpatches, was also available separately for the base Trinity. A Trinity version 1 or 2 operating system is required to utilize an installed SOLO-TRI board and enable access to Program "Bank S" containing Solo DSP Synthesizer soundpatches.
Later (replacing the SOLO-TRI on the market), the MOSS-TRI "MOSS DSP Synthesizer" (6-polyphony) option ($700 MSRP) compatible with Korg Z1 soundpatches (included factory installed in Trinity "V3" models) was available separately. A Trinity version 3 operating system is required to utilize an installed MOSS-TRI board and enable access to Program "Bank M" containing MOSS DSP Synthesizer soundpatches. (Trinity featured one internal DSP synthesizer expansion socket, so only one SOLO-TRI or else one MOSS-TRI expansion board may be installed at a time.)
All Trinity expansion options were designed for installation only by authorized service centers or dealers (installation labor costs not included in MSRP), not by end-users, and required accessing Trinity's main internals, exposing its power supply circuitry. Therefore, expansion option installation instructions were available only to service centers and dealers, and are not included in expansion option user manuals. In practice, the expansion option boards installed via simple sockets similar to personal computer boards, some also secured with metal brackets and screws (but soldering two wires was required with DI-TRI installation).
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