For information about the limitations of the audio hardware and suggestions for improving system efficiency and sound quality, refer to the Amiga Hardware Reference Manual. Once the data are entered, you can modify them with techniques described below. Then you can combine these waves for richer sound effects by adding the tables together. For instance, you can use trigonometric functions in your programs to create the more traditional sounds-sine waves, square waves, or triangle waves-by using tables that describe their shapes. On the Amiga you can create sound data in many other ways. The digital-to-analog converter converts the samples into voltages that can be played through amplifiers and loudspeakers, reproducing the sound. When the sound is played back by the Amiga, the table is fed by a DMA channel into one of the four digital-to-analog converters in the custom chips. A sampled sound is a table of numbers which represents a sound digitally. The Amiga computer uses a very general method of digital sound synthesis that is quite similar to the method used in digital hi-fi components and state-of-the-art keyboard and drum synthesizers.įor programs that can afford the memory, playing sampled sounds gives you a simple and very CPU-efficient method of sound synthesis. Most personal computers that produce sound have hardware designed for one specific synthesis technique. You can combine a right and a left channel for stereo sound, use a single channel, or play a different sound through each of the channels to create four-part harmony. The Amiga has four hardware audio channels-two of the channels produce audio output from the left audio connector, and two from the right. 10 Additional Information on the Audio Device.
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