MATRIXSYNTH

SAModular 30U Buchla Format Case

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"Some wear on end cheeks. Otherwise works well with 200 series clones. For a 200e predominant system you will likely need a second PSU (I could provide this at additional cost) to prevent lockups... Please note that this sale is for the case only; sale does not include modules."

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Roland Jupiter 4 49-Key Synthesizer SN 790784

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"Fantastic piece of synthesizer history. Just serviced including full recap with nichicon premium audio caps and new Synthronics replacement power supply installed."

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Yellow Model Elta Solar 50

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Yamaha CX5M II 128 1985 Black FM Computer with Extras

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Pic of the 4-Op FM synth engine editor screenshot below.

"This computer has been tested and serviced. It is perfect working order. Comes with many peripherals:
-YK-20 Full sized keyboard w/ music stand
-FM Voicing Program II mini cartridge (installed)
-RX editor cartridge
-Memory cartridge, with new battery (has no case but functions fine)
-FM Music Composer
-FMVoicing program 1
-MIDI recorder
-FM voicing program II full size cartridge
-monitor cable
-printer cable
-rca cable for video
-cassette interface cable
-manual for voicing program 1

Features are better than the original CX5M. It can accept any midi input with velocity. Data can be easily saved to cartridge.

To use cartridge you type in a command. I’ve figure out a few

call music
Opens internal music program

call fmv
Opens FM voicing programs, also the mini cartridge when nothing is plugged in the large cartridge slots

call rx
Opens RX drum machine editor (works with RX11 and RX15)

Also the memory cartridge must be put in the slot with the battery facing towards the keyboard"

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Casio KX 101

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video upload by Mac Channel

Keyboard and rhythm demo comes in after :50.

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"See photos and video. Like New - I would call this Mint. If you're interested, message me 1st and make sure it qualifies as your definition of Mint. It's sold ASIS with Video and Photos. It's a delicate beauty - probably the sexiest boombox ever made. It will be respectfully wrapped for a safe delivery.

Accessories: (unknown if OEM - but I've had them all paired with this unit for over 20 years - so...)
• Microphone - For the Mixing Mic Input on the unit. Works great! But, there is wire stress and cut out unless bend a certain way - you know what I'm talking about - it's in the photos as a close up. 
• Headphones - The 1/8 to 1/4 adapter on these is RadioShack.
• Maxell UR Cassette Tape - Not used except for the demo and maybe a bit from other testing.
• AC Cord
• Speaker Jumper Cables Left and Right"

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Solton ts4k (1989) Italodisco Machine SN 2698

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"Solton TS4K with PCM drums and some analog sections like bass especially designed for real-time arranger performance. Made in Italy in 1989! It’s the brother of the Solton Programmer 24!

This example is incredibile, near mint! Derived from the same project of Solton Programmer 24, the TS4K has the same analog fat sounds, programmable patterns and separate outputs for the bass and drum parts.

Fingered playing with styles and auto-accompaniment but also recording with quantizes from 4 to 96 resolution and variable time signature. There are several preset functions for live play!

See the listing or this previous post for additional details on the Solton TS4K.

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Roland Juno-106 w/ Stickers and Case

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SN looks like 489663.

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Limited Edition All Black Roland JUNO-DS 61

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Resonant filters on 80s Akai samplers | How to do it

video upload by Espen Kraft

"The early S-samplers from Akai did not have resonant filters, but by hooking them up to Akai synths at the time you could still achieve it. The individual voices from the sampler goes out a special connector at the back called "Voice out". All the 80s Akai samplers features this connector. With the appropriate cable you took the output here and connected it to the "Sampler In" on one of the Akai synths of the time.
The Akai AX60, AX73, VX90 and VX600 has these "Sampler In" ports at the back. The AX80 does not, just so you're aware. The AX80 was Akai's first synth and it preceded their first sampler, the S612 and is in many ways the odd one in their catalogue."

Espen Kraft S700 videos