у них на сайте есть гайд
о проблемах с интонацией упоминается именно применительно к 300 ямахам и 700 аулос. Например, про 500 аулос пишут, что инструменты стройные, но менее интересные тембрально. ASW их рекомендуют для выступлений в ансамбле. Позволю себе процитировать
Цитата:
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The Yamaha 300 series instruments are essentially middle-of-the-road modern recorders, suitable for both solo and ensemble playing. They have a full robust tone, especially in the lower register, and good high register response as well. Their intonation is considerably less than ideal, but our custom tuning procedures correct these intonation problems. The Aulos 500 series instruments feature much better intonation than the Yamaha instruments, but they are less interesting in tonal quality and not quite as full in the low register nor as responsive in the high register; we recommend them solely for ensemble use, where their unobtrusive tone quality can be an asset. The Aulos 700 series instruments, patterned after original 18th century recorders by the Dutch maker Richard Haka, are true baroque-style instruments with a complex, intense, reedy tone quality and sensitivity to articulation; they are best suited to 18th century solo literature. However, they require appreciably more experience and ability on the part of the player than the Yamaha 300 series and Aulos 500 series instruments; we do not usually recommend them for beginning players. There are some intonation flaws in the design and production of these instruments, but our custom-tuning procedures guarantee that each instrument purchased from our workshop will be well in tune.
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