Tag Archives: sequential

Dave Smith (Sequential) OB-6 Factory Patch List as Text File

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Dave Smith / Tom Oberheim OB-6So you have the incredible Dave Smith / Tom Oberheim OB-6 synthesizer, but you are having trouble keeping track of patch storage. You don’t want to overwrite your favourite factory patches, but it’s hard to remember what’s stored where!

There is a patch list on the Sequential site, but it is only available as a PDF. You might want to open it in a spreadsheet so you can manipulate / edit it, so here it is as a text file, which can easily be imported into almost any word processor or spreadsheet app. (Due to the stucture of the PDF on Sequential’s site I found it impossible to extract the text efficiently, so I manually re-typed the entire thing.)

Click here to download:
OB-6-Patch-List.txt

Or click here to read the full post, including the whole patch list, and comments

More Synth Maintenance Completed

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It’s been a busy week behind the scenes at Studio Nebula. Not a lot of creative stuff going on at the moment, but I’ve taken the time to give much-needed TLC to some vintage gear.

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An Observation: Synths With Revised Filters.

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Some of the world’s most respected, coveted synthesizers went through production revisions that audibly impacted the instruments’ sonic character. Here are four such synths that come to mind:

  • Korg MS-20
    Korg MS-20 (from Synthgear.com)(to quote Korg’s MS-20 Kit press release: The original MS-20 used different VCF circuits depending on the date of production. Units produced in the earlier period used a filter noted for its distinctive distortion and self-oscillation, while the filter used in later units was a low-noise design with a more mellow character.) The earlier filter is known as the “Korg 35″, while the later revision is a more conventional OTA-based filter.
  • ARP Odyssey
    ARP Odyssey (from Matrixsynth)(The Odyssey is notorious for bearing three different filters in its lifetime. The first Odysseys shipped with a Moog-style ladder filter. ARP was threatened with legal action so they quickly replaced it with a buzzy 2-pole filter, which was quickly replaced by a unique, aggressive sounding 4-pole filter.
  • Sequential Prophet-5 (rev. 2)Sequential Prophet-5
    Rev. 1 and Rev. 2 Prophet 5s used SSM ICs for their VCOs and VCFs, while the Rev. 3 Prophet 5 used CEM ICs. Some say the Rev. 3 Prophet 5 sounds weaker as a result.
  • Roland MKS-80 Super Jupiter
    The infamous Supe Jupe rack’s filter had an agressive, high-resonance character (IR3109, same filter as the Jupiter-6).MKS-80 Super Jupiter with MPG-80 Programmer But Rev. 5 units (serial number 511800 and up) used Roland’s new IR3R05, the same silky smooth filter that would find its way into the JX-8P, Super JX, and MKS-70.