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Docs: Glossary format tweak.

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Not strictly necessary, but file extensions benefit from having the `code` look.
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Electric Keet 2024-12-07 17:44:38 -08:00 committed by tildearrow
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doc/1-intro/glossary.md
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**bitmask**: a set of bits which represent individual single-bit toggles or groups representing small numbers. these are explained fully in the [hexadecimal primer](hex.md). **bitmask**: a set of bits which represent individual single-bit toggles or groups representing small numbers. these are explained fully in the [hexadecimal primer](hex.md).
**BRR**: a lossy sample format used by the SNES. it has a fixed compression ratio; groups of 32 bytes (16 samples) are encoded in 9 bytes each. **BRR**: a lossy sample format used by the SNES. it has a fixed compression ratio; groups of 32 bytes (16 samples) are encoded in 9 bytes each.
- usually stored in .brr files. - usually stored in `.brr` files.
**clipping**: when a sample or playback stream exceeds the maximum or minimum values. this can cause audible distortion. **clipping**: when a sample or playback stream exceeds the maximum or minimum values. this can cause audible distortion.
- this often occurs when a sample is amplified too much. - this often occurs when a sample is amplified too much.
@ -35,13 +35,13 @@
**DAC**: digital analog converter. this converts a digital representation of sound into actual output. **DAC**: digital analog converter. this converts a digital representation of sound into actual output.
**.dmf**: DefleMask Module File. **`.dmf`**: DefleMask Module File.
- _Furnace:_ .dmf 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:_ `.dmf` 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:_ .dmf files may be saved, but full compatibility isn't guaranteed and many features will be missing. this isn't recommended unless absolutely necessary. - _Furnace:_ `.dmf` files may be saved, but full compatibility isn't guaranteed and many features will be missing. this isn't recommended unless absolutely necessary.
**.dmp**: DefleMask Preset. an instrument file. **`.dmp`**: DefleMask Preset. an instrument file.
**.dmw**: DefleMask Wavetable. a wavetable file. **`.dmw`**: DefleMask Wavetable. a wavetable file.
**DPCM**: differential/delta pulse code modulation. this is a variety of PCM that stores each amplitude as its difference from the previous. **DPCM**: differential/delta pulse code modulation. this is a variety of PCM that stores each amplitude as its difference from the previous.
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**FM**: frequency modulation. this is a method of generating sound that uses one operator's amplitude to modify another operator's frequency. **FM**: frequency modulation. this is a method of generating sound that uses one operator's amplitude to modify another operator's frequency.
- the FM in Yamaha chips is more accurately called _phase modulation,_ which uses a different method of computation to achieve similar results. - the FM in Yamaha chips is more accurately called _phase modulation,_ which uses a different method of computation to achieve similar results.
**.ftm**: FamiTracker Module. **`.ftm`**: FamiTracker Module.
**.fui**: a Furnace instrument file. **`.fui`**: a Furnace instrument file.
**.fur**: a Furnace module file. **`.fur`**: a Furnace module file.
**.fuw**: a Furnace wavetable file. **`.fuw`**: a Furnace wavetable file.
**hard-pan**: sounds can only be panned to the center, 100% left, or 100% right. this often appears in the instrument editor's panning macro as on/off toggles for the left and right channels. **hard-pan**: sounds can only be panned to the center, 100% left, or 100% right. this often appears in the instrument editor's panning macro as on/off toggles for the left and right channels.
@ -68,7 +68,7 @@
**interpolate**: to fill in the area between two values with a smooth ramp of values in between. **interpolate**: to fill in the area between two values with a smooth ramp of values in between.
- some sample-based chips can interpolate, filtering out unwanted harmonics. - some sample-based chips can interpolate, filtering out unwanted harmonics.
**.it**: Impulse Tracker module. **`.it`**: Impulse Tracker module.
**ladder effect**: an inaccurate yet common term for the DAC distortion that affects some Yamaha FM chips. **ladder effect**: an inaccurate yet common term for the DAC distortion that affects some Yamaha FM chips.
@ -113,7 +113,7 @@
**register**: a memory location within a sound chip. "register view" shows all the relevant memory of all chips in use. **register**: a memory location within a sound chip. "register view" shows all the relevant memory of all chips in use.
**.s3m**: ScreamTracker 3 Module. **`.s3m`**: ScreamTracker 3 Module.
**sample** (1): a digitally recorded sound. usually stored as some variant of PCM. **sample** (1): a digitally recorded sound. usually stored as some variant of PCM.
- these can take up a lot of room depending on length and sample rate, thus older systems tend to use short, lower quality samples. - these can take up a lot of room depending on length and sample rate, thus older systems tend to use short, lower quality samples.
@ -140,8 +140,8 @@
**unsigned**: a digital representation of a number that can only be positive. **unsigned**: a digital representation of a number that can only be positive.
- if an imported raw sample sounds recognizable but heavily distorted, it's likely to be signed interpreted as unsigned or vice-versa. - if an imported raw sample sounds recognizable but heavily distorted, it's likely to be signed interpreted as unsigned or vice-versa.
**.vgm**: Video Game Music. a file containing the log of data sent to a sound chip during sound playback. **`.vgm`**: Video Game Music. a file containing the log of data sent to a sound chip during sound playback.
- saving to a .vgm file may be compared to "converting text to outlines" or similar irreversible processes. the results cannot be loaded back into the tracker. - saving to a `.vgm` file may be compared to "converting text to outlines" or similar irreversible processes. the results cannot be loaded back into the tracker.
- different versions of the VGM format have different capabilities, with trade-offs. older versions may lack chips or features; newer versions may not be compatible with some software. - different versions of the VGM format have different capabilities, with trade-offs. older versions may lack chips or features; newer versions may not be compatible with some software.
- samples are stored uncompressed. PCM streams (such as DualPCM) can quickly take up a huge amount of space. - samples are stored uncompressed. PCM streams (such as DualPCM) can quickly take up a huge amount of space.
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**wavetable** (2): an ordered group of wavetables(1) used in sequence within a single instrument. **wavetable** (2): an ordered group of wavetables(1) used in sequence within a single instrument.
**.xm**: eXtended Module. the file format of songs made with FastTracker 2. **`.xm`**: eXtended Module. the file format of songs made with FastTracker 2.
**.zsm**: ZSound Music. a VGM-like file meant specifically for the Commander X16 computer. **`.zsm`**: ZSound Music. a VGM-like file meant specifically for the Commander X16 computer.