OPTIGAN T125 Diagnostic Test Disc Flexi LP RARE
  $   173

 


$ 173 Sold For
Feb 27, 2011 Sold Date
Feb 20, 2011 Start Date
$   30 Start price
15   Number Of Bids
  USA Country Of Seller
eBay Auctioned at
 
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Description

  • Up for auction is a very rare Test Disc for the Optigan Music Maker. The disc is T125 (Marked). This information regarding the disc and its purpose was found on www.optigan.com/content/info/optigan/merchandise-catalog/discs/test.

  • Test Discs

    All three test discs were distributed to Optigan service technicians. This makes them among the most rare of Optigan discs.

     

    T123 Test Disc

    This test disc features a sine wave tone on all 57 channels. It’s mostly useful for diagnosing volume discrepancies.

    • Known Revisions: —
    • Rarity: ER
     

    T125 Test Disc

    This test disc features a sine wave on all even numbered channels. It’s mostly useful for diagnosing crosstalk problems, because when you open a channel that’s supposed to be silent, you can hear exactly how much signal is bleeding through from the adjacent channels.

    • Known Revisions: We’re not sure if this counts, but some copies of the T125 disc are marked with a hand-scrawled “X1? just after the typeset “T125.” There is no noticeable difference in the sound of the disc, so it’s not clear what the “X1? indicates.
    • Rarity: ER
     

    T110 Test Disc

    This test disc (Brian Kehew’s personal favorite of ALL the Optigan discs!) actually features NO signal at all on any channels. It is used for diagnosing key-popping-type sounds, though we don’t see any reason why you can’t diagnose this problem by simply leaving the disc drive empty!

    • Known Revisions: —


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