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Vintage Yamaha Keyboard
PS-20
Serial Number 077468 main features:49 fullsizebuilt-in speaker10 note polyphony (only 4 notes with accompaniment)4 note polyphonic chordsmonophonic solo voice10 semi- OBS preset orchestra sounds {organ 1, trumpet, clarinet, piano, accordion | organ 2, string, oboe, harpsichord, vibraphone} selected by 5 OBS buttons + bank switch button8 semi- OBS preset solo sounds {violin, trumpet, trombone, piccolo | saxophone, guitar 1, guitar 2, funny} selected by 4 OBS buttons + bank switch button8 semi- OBS preset rhythms {march, waltz, tango, rhumba | disco, rock, swing, samba} selected by 4 OBS buttons + bank switch buttonlocking multi- contact push button switches to select sounds and rhythmssustain switchfingered & single finger chord”chord memory” switch (means simply that chord is held when releasing keys)2 bass variations (“multi bass”)2 arpeggio variationsrhythm “8 bar variation” switch (inserts a fill-in every 8th bar)tempo sliderseparate rhythm, chord, arpeggio and solo volume slidersAll main voice timbres seem to be made from a mixture of multiple analogue filtered squarewaves with a common digital envelope.analogue percussion {base, snare, hihat, low & high tabla(?)} sounds rather unspectacular, although possibly more realistic than many other analogue percussions. The hihat is likely mixed from 2 digital shift register feedback noise outputs at the CPU. The base is a dull popping noise.CPU “Yamaha YM1011, 16 2056” (40 pin DIL) + separate sound chip “Yamaha YM1101 E, 16 1853” (40 pin DIL).solo voice CPU(?) “Yamaha YM1102 F, 1Z 2258” (24 pin DIL) + sound chip(?) “Yamaha YM-1002, 1Y 20 28” (16 pin DIL) + filter IC “1G02611, 112 400” (14 pin DIL)jacks for AC adapter, headphone, cinch sound input(!) & output and “expression” volume pedalinternal power supply module that plugs into the battery compartmentInclude original foldable stand and foot pedal
Includes mains power insert – Australian plug
when tested everything worked except – the low C and A Keys .-
Direct deposit details will be available to Australian Buyers at the close of the auction
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Category: Musical Instruments:Pianos, Keyboards and Organs:Electronic Keyboards
Location: Lake Macquarie