ETERNA PIANOS, OR YAMAHA?
Eterna upright pianos with a Yamaha action seems very strange to most piano technicians. This article tells this Japanese brand's history by consolidating pieces of information found all over the internet.
Eterna upright pianos with a Yamaha action seems very strange to most piano technicians. This article tells this Japanese brand's history by consolidating pieces of information found all over the internet.
One reason for piano to go out of tune is rapid change of relative humidity.