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Tuesday, August 03, 2021

Korg NTS-1 Custom Oscillator Dev: Basic Phase Distortion Analysis


videos upload by Graham Keane

Update: new videos added.

"This simple program will serve as the basis for implementing the Vector Phaseshaping technique as outlined by Lazzarini, Timoney et al."

Playlist demos:

1. Korg NTS-1 Custom Oscillator Dev: Basic Phase Distortion Analysis
In this short video we will have a quick examination of the output of the classic phase distortion technique implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This technique produces a non-linear phase distortion of a basic cosine waveform.
2. Korg NTS-1 Custom Oscillator Dev: Filtered Phase Distortion Analysis
In this short video we will have a quick examination of the output of the filtered phase distortion program implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This technique produces a non-linear phase distortion of a basic cosine waveform which has pitch-tracked filters to tackle some of the aliasing.
3. Korg NTS-1 Custom Oscillator Dev: Basic Vector Phaseshaping (VPS) Analysis
In this short video we will have a quick examination of the output of the basic Vector Phaseshaping technique implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This technique uses a 2D inflection point to modulate the phase of a cosine waveform.
4. Korg NTS-1 Custom Oscillator Dev: Interpolated VPS Analysis
In this short video we will have a quick examination of the output of the interpolated Vector Phaseshaping (VPSI) technique implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This technique utilises pitch-tracked filters to combat aliasing as well as linear interpolation to reduce the effects of abrupt jumps in the phase due to skipped intervals in the inflection point's range.
5. Korg NTS-1 Custom Oscillator Dev: Formant Synthesis with VPS - Analysis
In this short video we will have a quick examination of the output of Formant Synthesis in the Vector Phaseshaping technique implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This technique uses a 2D inflection point to modulate the phase of a cosine waveform which generates formant peaks over certain ranges.
6. Korg NTS-1 Custom Oscillator Dev: Formant Synthesis via VPS with Interpolation Gain - Analysis
In this short video we will have a quick examination of the output of the Formant Synthesis through Vector Phaseshaping technique implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This particular version uses an interpolation gain to scale two separate VPS signals which are then linearly mixed to produce the main signal. The final signal is processed with pitch-tracked filters and an additional linear interpolation process to reduce the impact of gaps in the inflection points path which give rise to abrupt phase shifts.
7. Korg NTS-1 Custom Oscillator Dev: VPS with Multiple Inflection Points (MVPS) - Analysis
In this short video we will have a quick examination of the output of the Vector Phaseshaping technique with Multiple Inflection Points implemented on the Korg NTS-1 Nu:Tekt digital synthesizer.
8. Korg NTS-1 Custom Oscillator Dev: VPS with Lissajous Modulation - Analysis
In this short video we will demonstrate the output of the Vector Phaseshaping technique with Lissajous Modulation implemented on the Korg NTS-1 Nu:Tekt digital synthesizer.
9. Korg NTS-1 Custom Oscillator Dev: Multi-Vector Phaseshaping Synthesis (MVPS) Analysis
In this short video we will demonstrate the output of the Multi-Vector Phaseshaping Synthesis technique implemented on the Korg NTS-1 Nu:Tekt digital synthesizer. This technique uses a 3-2D inflection points to modulate the phase of a cosine waveform, which can produce interesting shapes as a result.
Additional Graham Keane Korg NTS-1 posts.

1980's Moog Source SN 4301

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via SYNTH CITY Reverb

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"The Moog Source is a monophonic Z80 microprocessor-controlled analog synthesizer manufactured from 1981 to 1985.

The Source was Moog's first synthesizer to offer patch memory storage. The design was also the first (and only) Moog synthesizer to feature a flat-panel membrane keyboard to replace the standard buttons, knobs and sliders, along with multihued panel graphics that were very different from anything Moog offered at the time.

Arguably the closest sounding to the Minimoog than any other Moog from this era. All functions tested in great working order, membrane buttons operate as expected with smooth operation."

Clavia Nord Lead 2X Virtual Analog Synthesizer

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via this auction

"The Nord Lead 2X comes with 20 voices polyphony and it’s sound engine runs at 24-bit 96 kHz. The previous models NL2 and NL3 both run at 44 kHz, and this gives and airiness and energy to the NL2X’s sound.

The Nord Lead 2X’s memory holds 396 user Programs, 100 user Performances, 40 user programmable Percussion Kits, 594 factory Programs and 300 factory Performances."

Simmons SDS9 6-Channel Drum Synthesizer Module w/ Case And Manual SN 06448

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via this auction

Philips Philicorda GM 751 SN 366075

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via this auction

"Philips philicorda 22 GM751 all transistor version. Full revised and tuned. Classic spring reverb inside. Pure sound of the 60's in studio or stage."

You can find additional posts on various Philicorda models including demos, and iOS version, and sampled based soft synth here.

Oberheim Two Voice TVS-1A with Sequencer and Lid *1975*

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via this auction

"Technically perfect and with some improvements:
- Toroidal Transformer - No Humming or Bizzing
- New Key Bushings - No Clonks or Clacks when playing
- Useful Mods like Filter CV In or Sequencer Sync (I used to Sync the Sequencer with a DAW via an ordinary Arturia Keystep CV Out - works perfectly) professionally performed on the intended mini jacks on the back side
- recently professionally serviced
- sound like it should be: awesome
- inclusive Lid
- early SN - only around 500 where made

Cosmetically nearly perfect only the hinges from the case are a little but rusty."

Sequential Circuits Prophet 5 Rev 3 SN 2624

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via this auction

"This Prophet 5 V 3.2 is in beautiful condition and has been fully serviced (rebuilt power supply, caps and ICs replaced) and works perfectly with zero issues. There are some tiny cosmetic imperfections as expected for an instrument this old. Includes custom dust cover in picture."

Akai VX-600

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via this auction

"Often compared to Oberheim Xpander due to a similar matrix routing system and same filter chips. Very rare. Perfect working and physical condition.
Comes with memory card and a breakout box for 6 individual voice outs.
Readable but a bit pale, squeeky display (common thing on these)."

UDO SUPER 6 BINAURAL Synthesizer/Impro*ambient/space music*stephanie ibiza[Universal Consciousness]


video upload by Human Call. Neuronaluniverse Studio

"I use only the synthesizer UDO SUPER 6,with Eventide SPACE.
(Recorded direct to DAW,just one audio track)."

JSI PROGUE - monophonic analog DIY synthesizer


video upload by JSI

You can find additional PROGUE posts here.
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