{"id":49499,"date":"2020-05-22T07:52:07","date_gmt":"2020-05-22T07:52:07","guid":{"rendered":"https:\/\/greatsynthesizers.com\/?p=49499"},"modified":"2021-01-06T13:45:14","modified_gmt":"2021-01-06T13:45:14","slug":"sequential-pro-one-modifications-and-upgrades-part-1","status":"publish","type":"post","link":"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-1\/","title":{"rendered":"Sequential Pro-One &#8211; modifications and upgrades (part 1)"},"content":{"rendered":"\n<p>We would like to point to a few useful ideas, modifications and upgrades pertaining to the Sequential Pro-One. This classic synthesizer was built from 1981 to 1984 and it sold about 10,000 times. Being a very reliable instrument, the Pro-One is still in ciculation in large numbers today. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-01.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-01.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49409 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-01.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-01-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-01-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-01-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<!--more-->\n\n\n\n<p>Part 1 of our trilogy is devoted to a simple idea: to a pitch bend \/ mod wheel socket upgrade that brings the instrument up to masterkeyboard standards \u2026<\/p>\n\n\n\n<p>Explanatory notes: The Pro-One synthesizer offers a small step-sequencer \/ arpeggiator that outputs the notes via CV \/ Gate &#8211; including any glide effect &#8211; if activated. The sequencer is both useful and simple to operate. Sequences are recorded in step-time and can be played back and transposed in real-time via the keyboard. In this respect, the Pro-One is a nearly perfect &#8220;instant music&#8221; synthesizer, both for internal and for external cv-control.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-02.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-02.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49411 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-02.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-02-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-02-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-02-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<p>One little snag (there&#8217;s always one): Neither pitch-bend nor modulation wheel values can be used for external performance, which means that the usefulness of the Pro-One as a controller keyboard is somewhat limited.<\/p>\n\n\n\n<p>An experienced technician has no big problems implementing what we&#8217;re missing here: Pitch-Bender Out and Mod-Wheel Out. Now, the real sensation is that <strong>mod wheel output refers to the sum (!) of all modulation matrix control voltages<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-04.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-04.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49413 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-04.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-04-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-04-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-04-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<p>This means that not only the PITCH BENDER CV is available, but also the following control voltages: FILTER ENVELOPE, OSCILLATOR B (multiple waveforms, frequency range switchable audio \/ low) and the LFO (again with multiple waveforms). The voltage amount can be controlled in any case via WHEEL or DIRECT(ly).<\/p>\n\n\n\n<p>This modification improves the Pro-One master keyboard functions significantly: The user now has a keyboard, sequencer, arpeggiator and glide at his fingertips (for controlling other analog synthesizers or modular systems), and, in addition, extra control voltages such as pitch bend \/ envelope \/ oscillator \/ LFO signal.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-03.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-03.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49415 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-03.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-03-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-03-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-03-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<p>Now, the availability of these CV voltages is in itself a source of great satisfaction, but in addition, there&#8217;s the MOD-MATRIX with all its details and routing flexibility, which makes it even better. To be clear: This gives you lots of CV voltages which are useful in a great variety of ways &#8211; from well-dosed modulations to dramatic sound effects.<\/p>\n\n\n\n<p>What about a combined Pro-One oscillator \/ LFO signal that modulates an ARP 2600, Roland System-100M, Doepfer A-100 module, or Roland SH or Korg Mono \/ Poly synthesizer (&gt; VCF IN)? A signal that can be intuitively adjusted from 0 to 100 (no modulation \/ maximum effect) via the modulation wheel? All that while the sequencer runs the Pro-One <em>and <\/em>the external synthesizer in parallel?<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49435 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-Detail.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-Detail.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49438 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-Detail.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-Detail-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-Detail-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-MacBeth-M5-Detail-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<p>And what about a simultaneous Pitch-Bender \/ Mod-Wheel modulation of <em>both <\/em>MacBeth M5 filters? Or of two of its oscillators? Or of any Eurorack LFO (VC speed) or VCO (pulse width modulation)? These are just a few of the performance options available with a Pro-One that additionally features Pitch-Bend Out and Mod-Wheel Out.<\/p>\n\n\n\n<p>We won&#8217;t delve into <em>how <\/em>to implement this modification. We did not install ours ourselves. A friend of ours &#8211; an experienced technician &#8211; implemented this mod for us. After a quick look at the Pro-One circuit diagram, he identified the two points for pitch-bend CV and ModMatrix CV, tapped them and brought them to the outside of the synth.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-05.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1300\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-05.jpg\" alt=\"Sequential Pro-One Synthesizer\" class=\"wp-image-49423 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-05.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-05-768x624.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-05-1536x1248.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-05-1000x813.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1300;\" \/><\/a><\/figure>\n\n\n\n<p>It&#8217;s really the <em>idea <\/em>that counts here. A Pro-One equipped with Pitch-Bender \/ Mod-Wheel Outputs converts into a nearly perfect analog master keyboard. A master keyboard that not only allows you to control an external synth, but also adds to the overall performance with a very individual, delicious analog sound.<\/p>\n\n\n\n<p>By the way (and should the question arise), the wooden housing of the Pro-One shown is from <em>Synthwood<\/em>. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-08.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-08.jpg\" alt=\"\" class=\"wp-image-49594 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-08.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-08-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-08-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Upgrades-PartI-08-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<p>We do not know whether the company in question is still active or not, since the website dates back to 2013. But there are still contact details listed, so it is quite possible that a <a href=\"http:\/\/synthwood.com\/pro-one\/\" target=\"_blank\" rel=\"noreferrer noopener\">Custom Sequential Circuits Pro One Conversion Kit<\/a> is still available on request.<\/p>\n\n\n\n<p>Similar to the Synthwood cases are those from the English manufacturer <a href=\"https:\/\/reverb.com\/shop\/roberts-gear-garage-701\" target=\"_blank\" rel=\"noreferrer noopener\">MINT CASE<\/a>. Their <a href=\"https:\/\/reverb.com\/item\/36848195-sequential-circuits-pro-one-wooden-case-american-walnut-analog-synthesizer\" target=\"_blank\" rel=\"noreferrer noopener\">wooden Pro-One case<\/a> is even more clearly indebted to the dimensions of the original plastic frame. The wooden chassis, currently available (spring 2021) on reverb.com, impresses with its fine wood (American Walnut), and with its optical elegance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Mint-Case.jpg\" data-rel=\"lightbox-gallery-kmePSRgh\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\"><img decoding=\"async\" width=\"1600\" height=\"1000\" data-src=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Mint-Case.jpg\" alt=\"\" class=\"wp-image-53332 lazyload\" data-srcset=\"https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Mint-Case.jpg 1600w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Mint-Case-768x480.jpg 768w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Mint-Case-1536x960.jpg 1536w, https:\/\/greatsynthesizers.com\/wp\/wp-content\/uploads\/2020\/05\/Sequential-Pro-One-Mint-Case-1000x625.jpg 1000w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1000;\" \/><\/a><\/figure>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-2\/\" target=\"_blank\">Part 2<\/a> and part 3 of the trilogy deal with upgrades of alternative wooden side panels, and with CPU \/ MIDI \/ keyboard \/ knob-caps modifications. The stabilization of potentiometers and rear sockets is also discussed in detail \u2026<br><br>Continue with <a rel=\"noreferrer noopener\" href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-2\/\" target=\"_blank\">part 2<\/a> &#8230;<\/p>\n\n\n<div class=\"box lightgrey-box\">\n<h2><strong>Sequential Pro-One &#8211; <br>modifications and upgrades (part 1)<\/strong><\/h2>\n<p><b>Pitchbend \/ ModWheel Upgrade <\/b><br><b>Synthwood Upgrade<\/b><\/p>\n<p>Links:<br><a href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-1\/\" target=\"_blank\" rel=\"noopener noreferrer\">Sequential Pro-One &#8211; modifications and upgrades (part 1)<\/a><br><a href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Sequential Pro-One &#8211; modifications and upgrades (part 2)<\/a><br><a href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-3\/\" target=\"_blank\" rel=\"noopener noreferrer\">Sequential Pro-One &#8211; modifications and upgrades (part 3)<\/a><\/p>\n<p>Review: <br><a href=\"https:\/\/greatsynthesizers.com\/en\/review\/sequential-pro-one-best-vintage-monophonic\/\" target=\"_blank\" rel=\"noopener noreferrer\">Sequential Pro-One \u2013 best vintage monophonic?<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>We would like to point to a few useful ideas, modifications and upgrades pertaining to the Sequential Pro-One. This classic synthesizer was built from 1981 to 1984 and it sold&hellip; <a class=\"excerpt-more-link\" href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-1\/\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":49428,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2524,2028,2525],"tags":[2586,2584,466,257,1782,2033,2585,2587],"class_list":["post-49499","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2020-en","category-general","category-stories-en","tag-gusynth","tag-modification","tag-pro-one-en","tag-sequential-en","tag-sequential-en-2","tag-synthesizer-en-3","tag-techsmechs","tag-upgrade-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sequential Pro-One - modifications and upgrades (part 1) - GreatSynthesizers<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/greatsynthesizers.com\/en\/general\/sequential-pro-one-modifications-and-upgrades-part-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sequential Pro-One - modifications and upgrades (part 1) - GreatSynthesizers\" \/>\n<meta property=\"og:description\" content=\"We would like to point to a few useful ideas, modifications and upgrades pertaining to the Sequential Pro-One. 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All diesen (alten wie neuen) \u201cgro\u00dfartigen\u201d Instrumenten ist Great Synthesizers gewidmet. _________________________________________________________ In 2005 composer Arvo P\u00e4rt said: \u201cPlaying one tone really well is enough\u201d. In other words, it is sufficient to play one tone 'beautifully'. I agree with that. All musical efforts are focused on the sound itself. Although I studied classical music (piano and drums), it\u2019s the electronic sound that inspires me. Synthesizers are the epitome of new sounds and exciting tonal spheres. Today, many companies produce high-quality - excellent! - synthesizers: Doepfer, Cwejman, MacBeth, Moog, GRP, Synthesizers.com, COTK, Studio Electronics, John Bowen and others. It's their products I'm really interested in ... apart from Vintage Synthesizers, which I have been collecting for 20 years. Subsequent to our former websites Bluesynths and Blogasys, Peter Mahr and I have now created GreatSynthesizers. 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