The actual output that comes out the DOC is a 'time-domain multiplexed' sound output and five digital bits. Since 15 generators are left over, spec'ing the GS as having "15 voice sound capability" is a fair statement.
#ULTIMA III DOCS APPLE II GENERATOR#
Most software use one generator per voice. Generator 15 (oscillators 30 & 31) is reserved for system use (one oscillator is set to loop slowly at zero volume, to generate tempo I forget if the other is used by anything, it's probably used to play mono samples).
Both oscillators and generators are numbered from 0, so oscillators 0 & 1 are generator 0, oscillators 2 & 3 are generator 1, and so on. This is where the concept of 'generators' comes from - the 16 generators ARE operationally identical and that is why software prefers the generator concept. For the basic sample playing and looping they are, but for some more complex functions they must be paired. The oscillators are not all perfectly identical in operation. They can do so at variable speeds (automatically repeating or skipping sample values as necessary), they can loop on a power of two boundary, they can stop when they read a zero, they have independent volume settings, and various other things that aid in reproducing complex instruments without loading down the main CPU.īut when you come down to it, the DOC is capable of playing 32 sounds simultaneously and independent of each other, provided that all the sample data fits in the DOC RAM. Their basic function is to sweep through areas of the DOC memory reading samples and playing them. The DOC has 32 'oscillators' which are essentially smart DMA channels. All the sound samples have to be put in this RAM before they can be played. The DOC is a coprocessor with its own dedicated 64K of RAM. Oscillators are "smart voices" Generators are oscillator pairs that can generate extra effects with each other Channels are actual independent output lines like left and right speaker Not all are used for actual sound output. There are 32 oscillators (16 generators) and 16 channels. So how can I digitize fifteen different sounds Seen to me that it could only play eight different soundsĪt a time.
A fix?Ġ31- How can I create sounds and music on my 8-bit Apple II?Ġ32- Where can I get Mockingboard disks and music?Ġ01- If the GS only has eight output chanels, then it would What's the fix?Ġ27- Where can I find GS music and music creation programs?Ġ28- Does any Apple II emulator include Mockingboard support?Ġ29- Does anyone know what a "Supertalker" card is used for?Ġ30- My GS stereo board's sound output is very low and noisy. BNK files?Ġ22- How can I get more System Sounds for my GS?Ġ23- How can I run Music Studio 2.0 from hard disk?Ġ24- How can I record better sound samples on my IIgs?Ġ25- Squeals and other noises spoil my GS stereo board sound? A fix?Ġ26- My IIgs has no sound from the internal speaker. ?Ġ20- What is "old Apple" sound and how is it produced?Ġ21- What is a good source for. MockingBoard hardware and programming?Ġ10- How do I get my MockingBoard to work on my GS?Ġ11- How do I play Ultima IV/V with MockingBoard sound on my GS?Ġ12- How can I get 'regular Apple sound' to play through MB outputs?Ġ13- What GS programs will let me play MIDI files?Ġ14- Would FExt.NDA let you play thru Synthinit?Ġ16- What formats are used for audio files?Ġ17- How do I use my Echo speech synthesizer to produce speech?Ġ18- What types of sound files are used on the GS?Ġ19- Where can I find more info on cards, editing, digitizing.
#ULTIMA III DOCS APPLE II MAC#
The II Computing Apple II site, 1997-2010.Ĭsa2 FAQs file ref: Csa2SOUND.txt rev141 December 2009Ġ01- How does the GS produce so many simultaneous sounds?Ġ02- Is there a way to output quadraphonic sound on a IIgs?Ġ03- Do I get Stereo from my IIgs Sound Output jack?Ġ04- Why should I add a stereo board to my GS?Ġ05- How can I build my own GS stereo board?Ġ06- How can I transfer sound files created on a Mac to my GS?Ġ07- How do I program a Phasor Sound Card?Ġ08- What is required to build a Sound Input board for my IIgs?Ġ09- What's what re. The 2 Usenet newsgroup Apple II FAQs originate from See reader questions & answers on this topic! - Help others by sharing your knowledge
TheĬsa2 html FAQs are maintained on the II Computing site. The complete set of Csa2 text FAQs and Resource files is Users to ask questions, discuss issues, and share ideas. Subject: Apple II Csa2 FAQs: Sound & Music, Part 19/25Īpproved: 2 (Csa2) is concerned with the Apple II
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