Deviation Curves
If you select an interval in the left list, the right side shows the so-called deviation curves. They indicate how much the frequencies of the respective partials in the interval deviate from each other. The closer a curve is to the zero line, the less beating will be audible for the corresponding partial combination in this range. The deviations are always mapped to the lower tone of an interval in the curves.
In this example you can see that the 4:2 octaves are tuned almost pure in their central range, while the 8:4 octaves beat with about 1 Hz.
| As you change the weights of an interval, the deviation curves adjust live so that you can directly assess the effect. |
To display the deviation curves of several interval types at the same time, swipe to the left on the desired line in the interval list and select Show Deviations.
The interval name is then displayed in bold and the selected curves always remain visible, even if you switch to the level of other intervals. To hide the curves again, swipe to the left again and select Hide Deviations.
Show Tuning Curve
If you would like to see the tuning curve together with the deviation curves, select the item Show Tuning Curve from the menu.
Since the stretch of the tuning curve is much stronger than the deviations in the individual intervals, it has its own scale in this view. The orange scale applies to the tuning curve and the black scale to the deviation curves.
Relative / Absolute Weights
The blue tint of the deviation curves indicates how strong the selected weight of an interval is in the respective tone range. By default this is meant relative to the maximum of each curve. If you want to compare the weights of different curves graphically, you can also switch the coloring to absolute weights. To do this, select the item Absolute weights in the menu.
Deviation / Beat Frequency
By default, the curves show the deviation from pure intervals as beat rates. You can also switch them to show the deviation in cents. To switch, select the Deviation item in the menu.
