As far as I know, the Wagner tuba does have a French Horn mouthpiece, therefore performed by French horn players. But it's not a big French Horn.
In scores of Wagner, Strauss, Bruckner, Janacek the instruments called Tenortubas, should be performed using a Wagner tuba.
I don't know this exactly for Holst.
Maybe German based composer mean with Tenortuba the Wagner tuba,
and english based composers the Euphonium?
To be honest, I don't know which instrument Andy used for the Tenortuba part. It's not so easy to detect this instrument.
I would have used automatically the Wagner Tuba because of my culture background.
best
Herb
In scores of Wagner, Strauss, Bruckner, Janacek the instruments called Tenortubas, should be performed using a Wagner tuba.
I don't know this exactly for Holst.
Maybe German based composer mean with Tenortuba the Wagner tuba,
and english based composers the Euphonium?
To be honest, I don't know which instrument Andy used for the Tenortuba part. It's not so easy to detect this instrument.
I would have used automatically the Wagner Tuba because of my culture background.
best
Herb