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Blüthner Model A upright pitch raise
#2851563 05/23/19 06:10 PM
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I am considering upgrading my piano from a Yamaha LU-201 upright to a Blüthener Model A upright (49"/124cm). The Blüthner is from 1984 so it is an "iron curtain" piano. I understand the quality of these can be a bit hit and miss. The piano is in mint condition and has Renner action but has been sitting unused and not been tuned in 20 years. Anything special I should look for?

The piano is about 35 cent flat. To evaluate the tone and the touch of the piano I want to tune it before I buy it. Should I do pitch raise in two passes since it has not been tuned in 20 years? I am just an amateur piano tuner mainly using software to tune the piano (Tunelab and Easy Piano Tuner). I have been tuning my own piano twice a year for 5 years so I have some basic knowledge about tuning and regulating the action.

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Re: Blüthner Model A upright pitch raise
opnordahl #2851641 05/24/19 03:06 AM
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Tunelab can handle a single pass 35c pitch raise in overpull mode. Start a new tuning, load the 'average' tuning file and enable overpull. This should be adequate to evaluate the tone.

For a more exacting tune, you can start a new tune, measuring the inharmonicity following the pitch raise.

Re: Blüthner Model A upright pitch raise
opnordahl #2851656 05/24/19 04:50 AM
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Also note that some apps measure each note and apply the over-pull accordingly while others apply a general overpull.

Re: Blüthner Model A upright pitch raise
opnordahl #2853417 05/29/19 06:50 AM
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I tune my own Blüthner Model A but it always has been kept at 440. If I were you and it was 35c low, I would bring it to pitch over three passes. Two coarse and one fine without using over-pull. Do you need to do it quicker? my reason is that this would let you see over time how stable it is. That might be more important than getting it quickly in tune as you will probably have to work on hammer voicing if that had not been done recently.

Ian


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2016 Blüthner Model A

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