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Corrections. 

Also, pulling "supersaw" until I've gotten something like consensus on the definition. Amusing, since it's what got me started on this glossary....
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Electric Keet 2023-09-04 22:11:20 -07:00
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doc/1-intro/glossary.md
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@ -28,15 +28,15 @@
**DAC**: digital analog converter. this converts a digital representation of sound into actual output.
**.DFI**: a DefleMask instrument file.
**.DFM**: a DefleMask song file.
**.DMF**: a DefleMask song file.
- _Furnace:_ DFM files may be read, and compatibility flags will be set to make them play as accurately as possible, but there may still be glitches.
- _Furnace:_ DFM files may be saved, but full compatibility isn't guaranteed and many features will be missing. this isn't recommended unless absolutely necessary.
**.DFW**: a DefleMask wavetable file.
**.DMP**: a DefleMask instrument file.
**DPCM**: differential pulse code modulation. this is a variety of PCM that stores each amplitude as its difference from the previous.
**.DMW**: a DefleMask wavetable file.
**DPCM**: differential/delta pulse code modulation. this is a variety of PCM that stores each amplitude as its difference from the previous.
**duty**: in a pulse wave, this represents the ratio of the "on" part of the wave.
- a square wave is a pulse wave with a duty of 50%.
@ -63,9 +63,9 @@
- analogous to image antialiasing.
- some sample-based chips can perform interpolation, but most cannot.
**ladder effect**: an inaccurate yet common term for the DAC distortion that affects the YM2612 chip.
**ladder effect**: an inaccurate yet common term for the DAC distortion that affects some Yamaha FM chips.
**LFO**: low frequency oscillator. this is slow, often subsonic oscillator used to alter other sounds.
**LFO**: low frequency oscillator. this is a slow, often subsonic oscillator used to alter other sounds.
**macro**: a sequence of values automatically applied while a note plays.
@ -76,8 +76,8 @@
**oscillator**: a sine wave or other basic waveform used as sound or to alter sound.
**PCM**: pulse code modulation. a stream of data that represents sound as a rapid sequence of amplitudes.
- CD tracks and WAV files are PCM.
- FLAC, OGG, and MP3 are compressed PCM. these must be uncompressed outside Furnace before they can be used as samples.
- CD tracks and .WAV files are PCM.
- .OGG and .MP3 are compressed differently from PCM. they must be converted to .WAV outside Furnace before they can be used as samples.
**period**: the length of a repeating waveform. as frequency rises, the period shortens.
@ -108,7 +108,7 @@
- if an imported raw sample sounds recognizable but heavily distorted, it's likely to be unsigned interpreted as signed or vice-versa.
**software mixing**: mixing multiple channels of sound down to a single stream to be sent to a PCM channel.
- this puts a heavy load on the sound chip or the host system, so it was rarely used in games.
- this puts a heavy load on the CPU of the host system, so it was rarely used in games.
- _Furnace:_ this is used for DualPCM and QuadTone.
**square wave**: a wave consisting of only two values, high and low, with equal durations within the wave's period.