'dedic' tuning

[Theo]

I don't know if anyone can detect any difference from the sound sample that I posted. But from my side, I will say this: I think there is a notable difference in using the Dedic/Bruneau/Viennese (Wish I just knew what to call it) tuning method.
  

What are you comparing it with?   To be a fair comparison it should be a similar reed configuration, similar tremolo etc.

[j.w.forrest]

What are you comparing it with?   To be a fair comparison it should be a similar reed configuration, similar tremolo etc.

I am comparing to the C row of my C/G 2 row pokerwork, tuned with similar beating interval with one reed at zero, one at 'plus'. It sounds sharper and a bit 'off' from the chords and basses. As for when it was tuned, this one is touched up routinely as needed.

[Theo]

That sounds like a very good basis for comparison.

[j.w.forrest]

That sounds like a very good basis for comparison.

 Yes, well it's as close as I can get, at any rate. I am not necessarily going to wave the flag and campaign that this is the only legitimate tuning, either. Tuning is an incredibly broad spectrum, and quite personal. And after listening to praise and skepticism from other parties, decided I would have to try this one myself, and I did.  I like it.........jwf

[acctech]

What is "Dedic tuning", this is a new one on me. I'm always interested in topics like this. Is this a definitive type of tuning? It's often my experience that many terms are subjective, so I'm just looking for clarification. Thanks 
Off topic: Love the accordion playing smiley, I never saw that before. LOL

[acctech]

Ahhhh, I read a little more. If I understand correctly the two middle reeds are "balanced" the same amount of cents sharp and flat from the standard pitch of the instrument. For example:

A tremolo on a "conventionally" tuned MM might have c1 tuned @ A440 for the first voice, and A440 +8 cents for the second voice.

The same amount of tremolo on a "dedic" tuned MM would have the first voice tuned to A440 -4 cents and the second voice at A440 +4 cents. It's still an 8 cent spread.

[Steve_freereeder]

Ahhhh, I read a little more. If I understand correctly the two middle reeds are "balanced" the same amount of cents sharp and flat from the standard pitch of the instrument. For example:

A tremolo on a "conventionally" tuned MM might have c1 tuned @ A440 for the first voice, and A440 +8 cents for the second voice.

The same amount of tremolo on a "dedic" tuned MM would have the first voice tuned to A440 -4 cents and the second voice at A440 +4 cents. It's still an 8 cent spread.

Yes, that's the idea. The only thing to be aware of is that your '8 cent spread' may only be true for one part of the range. Different tuners will adjust the beat rate (and hence the magnitude of the 'cent spread') according to the degree of tremolo required as you go up the range of the instrument. A constant cents difference across the range may well produce an unacceptably harsh and rapid tremolo towards the higher pitched end of the range. But I expect you knew that anyway. 

[Anahata]

A constant cents difference across the range may well produce an unacceptably harsh and rapid tremolo towards the higher pitched end of the range.

One of Ian's claimed advantages of +/- tremolo is that you can vary the offset (as measured in cents) in that way in order to keep the tremolo rate constant, and the octaves remain in tune, which they don't if you use the conventional "one on pitch and one sharp" method.