After information is recorded, you assign the data or track to separate channels for playback. MIDI channels are synonymous with timbre. If you want separate timbres, then you must assign the tracks to separate channels. if you want all the same timbre then assign the tracks to the same channel.
At a single time, does a track hold just one signal, and does a channel hold just one signal?
Assuming a track can only hold one signal and no more, the quote seems to say that if I want several signals to be played with the same timbre, then I should assign them to the same channel. Does that mean that I should assign the multiple signals to the same channel at the same time (so the channel will hold multiple signals at the same time), or at different times (i.e. play the multiple signals one after the other, i.e. the channel holds the different signals at different time and hold one signal at only one time)?