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Building a Cello

Fixing the sound post

6/3/2021

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The second thing to fix was the sound post. It was too tight and not fitting too well. I started the refitting by watching a video by the Distinguished Violinmaker Edgar Russ on the topic, Ep. 28: Fitting the Soundpost. In the video he explains well how to do it with some good tips. I found especially good the idea of using a shorter post to get the angles and fit well. I don't have another sound post blank but next time I will definitely do that.

Fitting the sound post requires one to insert and extract the sound post many many times from the ff hole which is quite tricky and I kept dropping the sound post into the cello. But I think I managed to improve the fit a lot. The photos below show the fit before and after. After the adjustments the sound post fits nicely also on the other side.

I didn't play around with the position of the sound post now. I put it approximately the thickness of the front behind the bridge, sideways in the middle of the bridge foot. This is something Edgar said in his video but I also read it in Strobel's book Useful Measurements for Violin Makers.

My son is playing the cello as I write this. It does seem to sound a lot better now. Some how more open and balanced. It can well be that I am imagining this.

I will now take the cello to Guy at www.howviolins.fi and let him check at least the sound post and refit it if he thinks it is necessary. He said the bridge could be tweaked too.
1 Comment
violinist link
21/1/2023 17:49:09

Hector Berlioz: “Time is a great teacher, but unfortunately it kills all its pupils.”

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    My son is outgrowing his cello soon. Could there be a better reason to learn how to make one :).

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