This aircraft demonstrates the use of two different Tone Generator blocks to control the amplitude and frequency of a single waveform simultaneously. It requires Tone Generator version 1.3 or above to work.

Part 1

By default, both blocks produce a waveform each, independent of each other.

• The back block (i.e., closer to the cockpit block) is a Variable Frequency block with a volume of 0.5 and the input 256 * (VTOL + 1).
• The front block is a Variable Amplitude block with a frequency of 256 Hz and an input of Trim.
• Both blocks have both their input and output channels set to -1, meaning that the receiving and transmission functions are disabled.

Use the VTOL and Trim controls and listen to the tones. While the tones are added to each other, each tone is only controlled by its respective VTOL or Trim input.

Part 2

Now set the channels to the following:

• On the Variable Frequency block, scroll to the bottom of the part settings, and set the Amplitude Input Channel to 0. This sets it up to look for amplitude controls on Amplitude Channel 0.
• On the Variable Amplitude block, set the Amplitude Output Channel to 0. This sets it up to control Variable Frequency blocks on Amplitude Channel 0.

Use the VTOL and Trim controls and listen. A single tone can be played using VTOL for frequency and Trim for amplitude. Remember the sounds.

Part 3

Now switch the Channels between -1 and 0. (If a Channel was previously set to -1, change it to 0, and vice versa.) Now, the Variable Frequency block controls the Variable Amplitude block on Channel 0.

Use the VTOL and Trim controls and listen. Again, use VTOL for frequency and Trim for amplitude. The result should be the same as in Part 2.

It is possible to use either block as the active source, and the other as a secondary Input Controller. In this case, the other sound settings of the source apply. With the Channel system, a single secondary Input Controller may also control multiple active sources. Make sure to stick to a standard when working with multiple amplitude/frequency control pairs.