Editing PC Engine SuperGrafx (section)

===Audio capacity===
Six [[Wavetable Synthesis]] audio channels, programmable through the [[Hudson Soft HuC6280|HuC6280A]] CPU.
Each channel had a [[frequency]] of 111.87&nbsp;kHz for single cycle of 32 samples (while not in D/A mode) with a [[Audio bit depth|bit depth]] of 5 bits.  Each channel also was allotted 20 bytes (32×5 bits) of RAM for sample data.
The [[waveform]]s were programmable so the composers were not limited to the standard selection of waveforms ([[Square wave (waveform)|square]], [[Sine wave|sine]], [[Sawtooth wave|sawtooth]], [[Triangle wave|triangle]], etc.). But the use of standard waveforms, and semi-standard forms, such as a 25% pulse wave were used fairly often.
The first two audio channels (1 and 2) were capable of [[Low frequency oscillation|LFO]] when channel #2 was used to modulate channel #1.

Optional software enabled Direct [[Digital-to-analog converter|D/A]] which allows for sampled sound to be streamed into any of the six PSG audio channels. When a channel is in D/A mode the frequency is as fast as the CPU can stream bytes to the port, though in practicality it is limited to 6.99&nbsp;kHz when using the TIMER interrupt with its smallest loop setting (1023 cpu cycles) or 15.7&nbsp;kHz using the scanline interrupt.
There is a method that combines two channels in DDA mode to play back 8-bit, 9-bit, or 10-bit samples.
The addition of the [[CD-ROM]] peripheral adds [[Compact Disc Digital Audio|CD-DA]] sound, and a single [[Adaptive differential pulse-code modulation|ADPCM]] channel to the existing sound capabilities of the PC Engine.