Nebulon Posted June 22, 2018 Share Posted June 22, 2018 We all know about OctaMED's 8-channels and how StarDust takes two channels and mux's them together to make a total of 6-note polyphony. However, here's a novel way to get a 5th audio channel out of the Amiga by making good use of the (until now) useless composite port: http://jmp.no/blog/a-5th-audio-channel-on-the-amiga Additionally, I was doing some reading on the Amiga's audio circuitry and it's pretty interesting. Here's some of the neat things you do: - Make your own waveforms by drawing them using Audiomaster or some other tracker app. - Feed raw data into Paula to generate crazy waveforms. - Play two waveforms over one another to sum them to a single channel. - Modulate one audio channel with another. - Use DMA to handle the audio or switch it off and let the CPU take direct control. - Append one waveform with another in code. - Overlay all of the channels to create a 14-bit stereo sample playback unit. - Do AM and FM synthesis with an app like OctaMED. - Make use of Paula's four included state machines (and send data to them via the CPU or Agnus). - Increase the sample rate to 57.7 KHz if you have a SuperDenise chip. It's too bad they didn't up this same design to 16-bit for the release of the AGA machines. As 8-bit audio chips go though, the sound quality is pretty awesome. A good example of this is the real-time monitoring mode of the DSS8+ cartridge on a machine with a 68030. It almost sounds like a 16-bit stereo sampler. 2 Quote Link to comment Share on other sites More sharing options...
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