Super Nintendo (SNES) Architecture: Old Hardware With Mind-Blowing Features by Rodrigo Copetti

Author:Rodrigo Copetti [Copetti, Rodrigo]
Language: eng
Format: epub
Tags: Nonfiction, Computers, Advanced Computing, Engineering, Computer Architecture, Application Software, Computer Graphics, Computer Science
ISBN: 9798201984861
Amazon: B0B8Y1ZYVP
Goodreads: 62157457
Published: 2019-06-27T16:30:00+00:00

6 Audio

Just like graphical abilities, the audio department of this console has gone through a significant revamp. I would say it even provides the most advanced synthesising techniques of its generation.

6.1 Architecture

Some companies partnered with Yamaha, others devised an in-house solution. Well, Nintendo partnered with Sony (the electronics conglomerate and authors of the Walkman) so they provide them with a sophisticated synthesiser. And so, Sony gave them two processors: a DSP that can sequence and mix samples; and a CPU that drives that DSP.

Hence, the resulting audio subsystem of this console is composed of:

The S-DSP: Plays ADPCM samples across eight different channels, they are mixed and sent through the audio output. The DSP is capable of manipulating samples with 16-bit resolution and a sampling rate of 32 kHz, it also provides: Stereo Panning: Distributes our channels to provide stereo sound.

ADSR envelope control: Sets how the volume changes at different times.

Delay: Simulates echo effects. It also includes a frequency filter to cut out some frequencies during the feedback. Don’t confuse this with Reverb!

Noise generator: Generates pseudo-random waveforms that sound like white static.

Pitch modulation: Allows some channels to distort others. Similar to FM synthesis (used by its competitor).

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