Note: Auction links are affiliate links for which the site may be compensated.
via this listing
Additional Perfect Circuit listings
Wednesday, January 01, 2025
Forat F9000
Note: Auction links are affiliate links for which the site may be compensated.
via this listing
Pic of the inside below.
"The last Forat 9000 up for sale built by Bruce Forat in October 2019. Has all the Forat expansions plus extras, everything is listed in the receipt. Totally refurbished machine with:
-New PSU
-Sampling card with 18-pad sampling and the 64k memory mod. (max time on all the pads)
-256kb Ram memory expansion. (max time on the buffer memory)
-7.09 O.S with machined socket in the motherboard for more stable operation.
-14 different sampling rates from 11K to 37K.
-Blue LED display.
-CEM filter on the two sample groups with cutoff and resonance slider for the toms and the congas. (same filter chip than in the Fairlight CMI and OB8)
-Toms and Congas modified to be monophonic for longer samples to cut each other off. (great feature for drum loops)
-Forat SMPTE card.
-Internal battery replaced.
-Wood sides made by a carpenter from genuine flamed birch for unique looks.
-comes with a padded cover
Everything works and the machine sounds absolutely fantastic and even punchier than the usual SP1200's, MPC 60's etc. The most of these machines were built in the 80's/90's, but is the most recent built and these won't be made for anyone anymore. If you have been seeking this highly regarded collector piece, this is your chance. Will be shipped in a heavily padded suitcase. Selling because I have currently so many machines and so little time.."
via this listing
Pic of the inside below.

-New PSU
-Sampling card with 18-pad sampling and the 64k memory mod. (max time on all the pads)
-256kb Ram memory expansion. (max time on the buffer memory)
-7.09 O.S with machined socket in the motherboard for more stable operation.
-14 different sampling rates from 11K to 37K.
-Blue LED display.
-CEM filter on the two sample groups with cutoff and resonance slider for the toms and the congas. (same filter chip than in the Fairlight CMI and OB8)
-Toms and Congas modified to be monophonic for longer samples to cut each other off. (great feature for drum loops)
-Forat SMPTE card.
-Internal battery replaced.
-Wood sides made by a carpenter from genuine flamed birch for unique looks.
-comes with a padded cover
Everything works and the machine sounds absolutely fantastic and even punchier than the usual SP1200's, MPC 60's etc. The most of these machines were built in the 80's/90's, but is the most recent built and these won't be made for anyone anymore. If you have been seeking this highly regarded collector piece, this is your chance. Will be shipped in a heavily padded suitcase. Selling because I have currently so many machines and so little time.."
Linn LinnDrum LM2
Note: Auction links are affiliate links for which the site may be compensated.
via this listing
"Gorgeous and original LinnDrum LM2 serial #3298 in spectacular cosmetic and working condition. The top controls and back panels look amazing and almost perfectly preserved. This Roger Linn machine has been fully tested and auditioned through our house system and sounds incredible. This highly sought after drum machine has the classic drum tones of the 80s we all know and love and will make an excellent addition to your collection. The wood panels are in beautiful condition and it comes with a power cord that looks original."
via this listing
"Gorgeous and original LinnDrum LM2 serial #3298 in spectacular cosmetic and working condition. The top controls and back panels look amazing and almost perfectly preserved. This Roger Linn machine has been fully tested and auditioned through our house system and sounds incredible. This highly sought after drum machine has the classic drum tones of the 80s we all know and love and will make an excellent addition to your collection. The wood panels are in beautiful condition and it comes with a power cord that looks original."
Siel DK600 Synthesizer w/ Preliminary Dot Matrix Printed Manual
Note: Auction links are affiliate links for which the site may be compensated.
via this listing
"If your looking at this then you know what it is. It is a rare, unique, powerful (SSM), and beautiful sounding analog polyphonic synth. It is in good physical and functional condition. It plays well with a few quirks, but thats how these DK's are.
It has been used sparingly in a pet free, smoke free, climate controlled, adult owned home studio. It comes with the dot matrix printed ORIGINAL INSTRUCTION MANUAL! Which I have never seen anyone else have. Its also labeled as 'Preliminary' which is interesting."
via this listing
"If your looking at this then you know what it is. It is a rare, unique, powerful (SSM), and beautiful sounding analog polyphonic synth. It is in good physical and functional condition. It plays well with a few quirks, but thats how these DK's are.
It has been used sparingly in a pet free, smoke free, climate controlled, adult owned home studio. It comes with the dot matrix printed ORIGINAL INSTRUCTION MANUAL! Which I have never seen anyone else have. Its also labeled as 'Preliminary' which is interesting."
Casio SK-1 with mod
Note: Auction links are affiliate links for which the site may be compensated.
video upload by Ground Grown Circuits
"This mod lets you use an on-board lfo to switch back and forth between the analog filters on the SK-1.
Available for sale on my Reverb page."
via this listing
"Mod Description:
With the switch up, everything functions as normal.
With the switch down, a square wave LFO is used to switch back and forth between the internal sound filters for the melody, creating a neat tremolo effect. LFO rate is set by the knob."
video upload by Ground Grown Circuits
"This mod lets you use an on-board lfo to switch back and forth between the analog filters on the SK-1.
Available for sale on my Reverb page."
via this listing
"Mod Description:
With the switch up, everything functions as normal.
With the switch down, a square wave LFO is used to switch back and forth between the internal sound filters for the melody, creating a neat tremolo effect. LFO rate is set by the knob."
Two Handsome Guys Play a Rare 70s Analog Synth Through a Rare 70s Analog Delay
video upload by foleytronics fx repair
"This is Tom’s Roland SH-7, repaired after the VCO 2 tube pot failed - this thing has some serious juice. We had the opportunity to run it through Doug’s Klark Teknik DN34, a very rare bucket brigade delay from the 70s that is similar to the Marshall Time Modulator. The stereo version was used by Tangerine Dream, you can hear very similar sounds on their record 'Exit'."
#Jamuary 1st 2025! "Water Hive"
video upload by Captain Credible
"Here we go again. 2024 was crazy, so let's hope 2025 turns out better. At least jamuary is an awesome start. I've been looking forward to this for a while now. Let the creative torrent begin! #jamuary2025 #polyendtracker #nts1 #seqtrak #jam #dawless #captaincredible"
Redshift 6 - From Reset To Preset: Paraphonic Overdrive
video upload by Supercritical Synthesizers
"On our From Reset To Preset series, we noodle sounds from scratch, and showcase our new Redshift 6 synthesizer in use.
This time we build a distorted paraphonic riff patch, using Redshift 6’s paraphonic voice mode, and overdriving the VCA with different character and drive settings."
BadClock
video upload by Joel Hilliard
"Welcome to 2025! Ringing in the new year with some litteral ear ringing tunes from the TRS-80 Model 4s. I present 'BadClock' a more edgy tune still made only with 100% grade A TRS-80! (haha)
All sounds are from the Orchestra 90 and S2 MIDI module populated on the MIDI80, piped through common audio gear.
part 1: MIDI80 S2 Drums again from the TRACKER program. Side chained with some compression, distortion and delay to take the chorus drums to the next level! Combined with a sine bassline compressed into a B215 Wide (IR)
part 2: A saw tooth running through the blackfinger, and into an IR 412 Celestion V30 micd w a D57. Some effects were created using the Model 4s noise and screwing with its pitch. Meh
part 3: (live part your watching) Sine coated with compression-distortion-compression chain, fed into an IR 112 micd with a D57 and R121-S
Distortion from the classic BOSS DS-1
I hope you enjoy, thanks for listening!"
Reface DX Solo playing | Meme 2025-01-01
video upload by atnr
"This work was created using YAMAHA Reface DX. It is sessioned with parts of the same timbre that were pre-recorded in a DAW."
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH