[sdiy] audio op amp replacement

[anthony]

Yeah I have never liked the action of any keboard unless it's fully weighted like a piano. I've been wanting to find a broken piano to use for the keys (and maybe the soundboard for a weird reverb). But the action is usually what goes on a piano. I suppose a usuable cluster of keys would remain though. But I have a piano in my house and I wouldn't want the action even from it. Too heavy...
  ----- Original Message ----- 
  From: phil macnutt 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Wednesday, February 08, 2006 9:41 AM
  Subject: [sdiy] audio op amp replacement


  Hi guys,

   

  Kinda OT, but I need a little help here.  My friend Adam and I are working with an old analog(ue) mixer in the studio that has bunches of NE5532 op amps installed.

  Adam caught wind that changing these out to OP275s would improve the sound quality.  I checked the data sheets and they are pin compatible, but I'm not smart enough to decipher the other specs to determine if another other changes in the glue components around the chip would need value changes when swapping these chips.

  So, is it really worth it to do the swap, and if so, any component changes needed?

   

  Also, 2 cents on the 1V controller thread:  

  <up on soapbox>

  beware that when using cheapo casio style keyboards, you are getting the worst action on the planet.  Often overlooked, I consider this to be very important for performance.  Now if you just make bleeps and helicopter sounds, or spend most of your time just looking at waveforms on the scope, then this does not matter, but If you gig and actually play leads and such, then I feel the extra money has to be spent for a better set of keys.  I wrote Roger asking him about the action on his sweet looking walnut cab controller, but I never heard anything.  I suspect though that it is very good.

  <down off soapbox>

   

  Phil

   
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