Assertion: stringed instrument's string | /r/Synonym | bourdon
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Source sentences:
text: Musicians originally used large bass lutes (c. 80+ cm string length) and a higher re-entrant tuning; but soon created neck extensions with secondary pegboxes to accommodate extra open (i.e. unfretted) longer bass strings, called diapasons or bourdons, for improvements in tonal clarity and an increased range of available notes.