How many voice channels does the Nintendo Entertainment System support natively?

The Nintendo Entertainment System (NES) natively supports five voice channels. These channels include two pulse channels, a triangle channel, a noise channel, and a delta modulation channel. The pulse channels produce square wave tones of different frequencies, the triangle channel generates triangle wave tones, and the noise channel generates random noise. Lastly, the delta modulation channel allows for the playback of sampled sounds. Together, these five voice channels enable the NES to produce a wide range of audio effects and music in its games.