Trumpet: Difference between revisions
m Rearranging; add fourth valve tubing lengths for quartertone and extended valve trumpets |
m →Intonation: since it's just a table, there's no need to use blockquote |
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| Line 12: | Line 12: | ||
In the article, Monzo explains that combining valves will change these ratios to more complex values. In summary, the combinations themselves: | In the article, Monzo explains that combining valves will change these ratios to more complex values. In summary, the combinations themselves: | ||
{| class="wikitable center-all" | {| class="wikitable center-all" | ||
|+Intonation of standard trumpet valve combinations | |+Intonation of standard trumpet valve combinations | ||
!Valves | ! Valves | ||
!ΔLength | ! ΔLength | ||
!Frequency<br>Ratio | ! Frequency<br>Ratio | ||
!Cents | ! Cents | ||
|- | |- | ||
| 2 | | 2 | ||
| +1/15 | | +1/15 | ||
|15/16 | | 15/16 | ||
| -112 | | -112 | ||
|- | |- | ||
|1 | | 1 | ||
| +1/8 | | +1/8 | ||
|8/9 | | 8/9 | ||
| -204 | | -204 | ||
|- | |- | ||
|12 | | 12 | ||
| +23/120 | | +23/120 | ||
| 120/143 | | 120/143 | ||
| -304 | | -304 | ||
|- | |- | ||
|3 | | 3 | ||
| +1/5 | | +1/5 | ||
|5/6 | | 5/6 | ||
| -316 | | -316 | ||
|- | |- | ||
|23 | | 23 | ||
| +4/15 | | +4/15 | ||
|15/19 | |15/19 | ||
| -409 | | -409 | ||
|- | |- | ||
|13 | | 13 | ||
| +13/40 | | +13/40 | ||
| 40/53 | | 40/53 | ||
| -487 | | -487 | ||
|- | |- | ||
|123 | | 123 | ||
| +47/120 | | +47/120 | ||
|120/167 | | 120/167 | ||
| -572 | | -572 | ||
|} | |} | ||
Observe that as valve combinations grow, the pitch sharpens from its target more and more (i.e. the valve combination 123 should target -600c but ends up 28 cents sharp). This is why, for large combinations like 13 and 123, it's advised in 12edo tuning to kick your third valve slide to accommodate this sharpening effect. | Observe that as valve combinations grow, the pitch sharpens from its target more and more (i.e. the valve combination 123 should target -600c but ends up 28 cents sharp). This is why, for large combinations like 13 and 123, it's advised in 12edo tuning to kick your third valve slide to accommodate this sharpening effect. | ||