Don Hills Posted November 5, 2017 Share Posted November 5, 2017 On 10/17/2017 at 10:57 PM, opus101 said: My guess is they employed the same trick Philips did in the SAA7220 - move the zero crossing point by adding an offset. Only a guess mind, I have no other idea how a hardware problem can be fixed in software. Your guess is correct - they added an offset in a digital filter. "People hear what they see." - Doris Day The forum would be a much better place if everyone were less convinced of how right they were. Link to comment
Popular Post Don Hills Posted November 6, 2017 Popular Post Share Posted November 6, 2017 3 hours ago, opus101 said: That's been confirmed by Mr Moffat himself? ... ''The secret to getting rid of a minute amount (-120db) of anomaly was a bit of offset added into our filter, which I had previously done at Theta Digital some thirty years prior to get rid of a significantly larger error. " - Mike Moffat opus101, Speed Racer and johndoe21ro 2 1 "People hear what they see." - Doris Day The forum would be a much better place if everyone were less convinced of how right they were. Link to comment
Don Hills Posted November 6, 2017 Share Posted November 6, 2017 Yes. So? "People hear what they see." - Doris Day The forum would be a much better place if everyone were less convinced of how right they were. Link to comment
Don Hills Posted November 7, 2017 Share Posted November 7, 2017 Yes. So? "People hear what they see." - Doris Day The forum would be a much better place if everyone were less convinced of how right they were. Link to comment
Don Hills Posted November 7, 2017 Share Posted November 7, 2017 Yes. So? I've been waiting for the other shoe to drop. Or was that it, simply an observation? If so, I apologise, I thought there was more to it. Anyway, Mike did what he said he did. Got rid of the glitch. If you repeat the measurement, you see the glitch isn't there any more. (I agree with Opus101, in theory it just got moved somewhere else, but good luck trying to find it by measurement.) opus101 1 "People hear what they see." - Doris Day The forum would be a much better place if everyone were less convinced of how right they were. Link to comment
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