FOREWORD back in 1988, the original TX16W OPERATING SYSTEM was sluggish and painful.
Later in 1993 a 3-rd part Swedish company developed a far better OS TYPHOON 2000 with enhanced features like better memory handling, CPU optimization, AIFF samples import, new filters and more.
NOTICE: This review is based on Swedish OS but the included manual for download is relative to standard Yamaha OS version.
VOICE CPU Motorola 68000 (+sub 6809) manages 16 voices polyphony at 12 bits resolution.
Basic sound hierarchy
is the WAVE (sample) grouped in VOICE (patch) and then VOICES are layered to make a PERFORMANCE.
SAMPLING the custom IC YM-2409 handles various sampling modes:
mono at 16 / 25 / 33 / 50 kHz
stereo sampling only at 33 kHz rate.
Some sample edit functions like:
cut point, trim cut, loop (modes: forward, single point), crossfade, reverse play, fade
out / in, timestretch and gain set.
TIP: Resampling process allows to convert frequency from 3 Hz to 50 kHz.
SAMPLE IMPORT systems import/export as standard AIFF PCM or original OS format, in addition some AWM2 synthesizers including Yamaha Sy-99 o Sy-85 directly import Tx16w samples by disk.
PERFORMANCE the 16 voices polyphony can be assigned to up to 8 groups (parts) each with individual settings:
- keyboard zone
- semitones transpose
voice priority (3 levels)
- Special key scaling function features 11 presets including full reverse, fixed and different microtonal controls including half semitones, quarter semitones, double ...
- special front input can trigger a sample from external audio source or drum machine signal with variable threshold.
MATRIX flexible modulation routing system offers 8 source + destinations:
||LFO 1 / LFO 2 depth
||LFO 1 / LFO 2 frequency
|EG 1 / EG 2
||EG 1 / EG 2
cFILTER a fine selection of 17 filter models at 2/4 poles with resonance PEAK including;
highpass, bandpass, notch and 3 user free slots.
ENVELOPE each group features 2 EGs:
AEG1 amplitude is hardwired(4-segments+2 levels)
AEG2 matrix routing (3 segments + 3 times).
LFO up to 2 modulators for each group with 5 bipolar shapes (noise, saw, sine, square and triangle) with retrig and tempo-sync options.
Each LFO modulates 14 destinations: pitch, volume, cutoff, resonance, panning, EG attack, AEG time, glide time, LFO1/2 depth, LFO1/2 rate and LFO1/2 EG.
1,5Mb of sample data.
RAM can be
expanded up to 6 Mb using special custom 1,5 MB memory modules (model YAMAHA EMM15) fitted into the dedicated slot.
|PIC| YAMAHA EMM15 ram expansion
STORAGE data can be saved in 3 ways:
standard Midi SDS dump
RS422 transfer range from 19200 to 153600 bauds.
- 720 DD disk PC DOS compatible file-system.
TIP: internal disk can be replaced by more modern USB emulator.
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|Not directly related, but the tx16w design is very close to other modules:
- TX-802 FM expander
- PTX-8 Drum brain